./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.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/safe004_power.opt_pso.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/safe004_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe004_power.opt_pso.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 15:33:10,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:33:10,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:33:10,378 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:33:10,378 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:33:10,405 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:33:10,406 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:33:10,406 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:33:10,407 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:33:10,410 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:33:10,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:33:10,411 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:33:10,412 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:33:10,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:33:10,413 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:33:10,414 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:33:10,414 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:33:10,414 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:33:10,414 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:33:10,415 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:33:10,416 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:33:10,416 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:33:10,416 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:33:10,417 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:33:10,417 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:33:10,417 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:33:10,417 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:33:10,417 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:33:10,417 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:33:10,418 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:33:10,418 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:33:10,418 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:33:10,418 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:33:10,418 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:33:10,418 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:33:10,419 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:33:10,419 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:33:10,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:33:10,419 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:33:10,419 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:33:10,419 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:33:10,420 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:33:10,420 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:33:10,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:33:10,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:33:10,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:33:10,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:33:10,745 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:33:10,746 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:33:10,747 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-04 15:33:12,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:33:12,253 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:33:12,253 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-04 15:33:12,272 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d1053b4a/d5c7bc2ae4ec423bb3d6241756fe1fa3/FLAGcc549b8da [2024-06-04 15:33:12,292 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d1053b4a/d5c7bc2ae4ec423bb3d6241756fe1fa3 [2024-06-04 15:33:12,295 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:33:12,295 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:33:12,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-04 15:33:12,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:33:12,468 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:33:12,469 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:33:12,469 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:33:12,481 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:33:12,482 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:33:12" (1/2) ... [2024-06-04 15:33:12,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d64b206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:33:12, skipping insertion in model container [2024-06-04 15:33:12,483 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:33:12" (1/2) ... [2024-06-04 15:33:12,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7e3a00c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:33:12, skipping insertion in model container [2024-06-04 15:33:12,488 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:33:12" (2/2) ... [2024-06-04 15:33:12,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d64b206 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:12, skipping insertion in model container [2024-06-04 15:33:12,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:33:12" (2/2) ... [2024-06-04 15:33:12,489 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:33:12,584 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:33:12,585 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-04 15:33:12,585 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-04 15:33:12,586 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-04 15:33:12,586 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:33:12,586 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-04 15:33:12,633 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:33:13,018 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:33:13,029 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:33:13,166 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:33:13,206 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:33:13,207 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13 WrapperNode [2024-06-04 15:33:13,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:33:13,209 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:33:13,209 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:33:13,209 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:33:13,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,292 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-04 15:33:13,292 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:33:13,293 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:33:13,293 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:33:13,293 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:33:13,307 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,310 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,336 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 15:33:13,338 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,355 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,357 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:33:13,361 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:33:13,361 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:33:13,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:33:13,362 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (1/1) ... [2024-06-04 15:33:13,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:33:13,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:33:13,434 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 15:33:13,461 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 15:33:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:33:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:33:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:33:13,497 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:33:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:33:13,498 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:33:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:33:13,499 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:33:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:33:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:33:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:33:13,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:33:13,501 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 15:33:13,616 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:33:13,618 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:33:14,023 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:33:14,025 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:33:14,212 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:33:14,212 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:33:14,213 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:33:14 BoogieIcfgContainer [2024-06-04 15:33:14,213 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:33:14,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:33:14,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:33:14,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:33:14,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:33:12" (1/4) ... [2024-06-04 15:33:14,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720bb48a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:33:14, skipping insertion in model container [2024-06-04 15:33:14,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:33:12" (2/4) ... [2024-06-04 15:33:14,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720bb48a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:33:14, skipping insertion in model container [2024-06-04 15:33:14,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:33:13" (3/4) ... [2024-06-04 15:33:14,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720bb48a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:33:14, skipping insertion in model container [2024-06-04 15:33:14,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:33:14" (4/4) ... [2024-06-04 15:33:14,222 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_power.opt_pso.opt_rmo.opt.i [2024-06-04 15:33:14,238 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:33:14,239 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:33:14,239 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:33:14,288 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:33:14,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 15:33:14,369 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 15:33:14,370 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:33:14,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:33:14,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 15:33:14,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 15:33:14,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:33:14,388 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;@79a41edf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:33:14,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:33:14,393 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:33:14,393 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:33:14,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:33:14,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:14,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:33:14,394 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 15:33:14,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1456369184, now seen corresponding path program 1 times [2024-06-04 15:33:14,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:14,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128739152] [2024-06-04 15:33:14,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:14,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:15,608 INFO 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 15:33:15,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:15,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128739152] [2024-06-04 15:33:15,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128739152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:15,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:15,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:33:15,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970830164] [2024-06-04 15:33:15,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:15,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:33:15,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:15,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:33:15,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:33:15,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-04 15:33:15,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:15,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:15,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-04 15:33:15,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:16,096 INFO L124 PetriNetUnfolderBase]: 1152/1756 cut-off events. [2024-06-04 15:33:16,097 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-04 15:33:16,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3598 conditions, 1756 events. 1152/1756 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8194 event pairs, 693 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-04 15:33:16,114 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 15:33:16,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 177 flow [2024-06-04 15:33:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:33:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:33:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-04 15:33:16,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 15:33:16,129 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 71 transitions. [2024-06-04 15:33:16,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 177 flow [2024-06-04 15:33:16,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:16,135 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 15:33:16,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-04 15:33:16,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 15:33:16,140 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 15:33:16,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:16,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:16,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:16,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:33:16,141 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 15:33:16,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash 588573823, now seen corresponding path program 1 times [2024-06-04 15:33:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:16,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072084016] [2024-06-04 15:33:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:16,968 INFO 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 15:33:16,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:16,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072084016] [2024-06-04 15:33:16,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072084016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:16,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:16,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:33:16,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156692575] [2024-06-04 15:33:16,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:16,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:33:16,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:33:16,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:33:17,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:33:17,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:17,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:17,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:33:17,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:17,405 INFO L124 PetriNetUnfolderBase]: 1644/2457 cut-off events. [2024-06-04 15:33:17,405 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2024-06-04 15:33:17,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 2457 events. 1644/2457 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11113 event pairs, 1035 based on Foata normal form. 3/2458 useless extension candidates. Maximal degree in co-relation 5625. Up to 2429 conditions per place. [2024-06-04 15:33:17,420 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 45 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 15:33:17,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 260 flow [2024-06-04 15:33:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:33:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:33:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-04 15:33:17,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 15:33:17,422 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 84 transitions. [2024-06-04 15:33:17,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 260 flow [2024-06-04 15:33:17,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:33:17,425 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-04 15:33:17,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-04 15:33:17,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-04 15:33:17,426 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-04 15:33:17,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:17,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:17,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:17,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:33:17,427 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 15:33:17,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:17,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1065920051, now seen corresponding path program 1 times [2024-06-04 15:33:17,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:17,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637072287] [2024-06-04 15:33:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:17,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:18,238 INFO 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 15:33:18,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:18,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637072287] [2024-06-04 15:33:18,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637072287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:18,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:18,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:33:18,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195115778] [2024-06-04 15:33:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:33:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:33:18,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:33:18,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:33:18,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:18,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:18,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:33:18,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:18,709 INFO L124 PetriNetUnfolderBase]: 1632/2439 cut-off events. [2024-06-04 15:33:18,710 INFO L125 PetriNetUnfolderBase]: For 1217/1217 co-relation queries the response was YES. [2024-06-04 15:33:18,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6215 conditions, 2439 events. 1632/2439 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11020 event pairs, 743 based on Foata normal form. 6/2443 useless extension candidates. Maximal degree in co-relation 6197. Up to 2381 conditions per place. [2024-06-04 15:33:18,728 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-04 15:33:18,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 346 flow [2024-06-04 15:33:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:33:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:33:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-04 15:33:18,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-04 15:33:18,730 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 103 transitions. [2024-06-04 15:33:18,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 346 flow [2024-06-04 15:33:18,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 344 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 15:33:18,733 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 198 flow [2024-06-04 15:33:18,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-04 15:33:18,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-04 15:33:18,734 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 198 flow [2024-06-04 15:33:18,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:18,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:18,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:18,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:33:18,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:18,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2146976690, now seen corresponding path program 1 times [2024-06-04 15:33:18,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:18,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745677566] [2024-06-04 15:33:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:18,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:20,099 INFO 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 15:33:20,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:20,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745677566] [2024-06-04 15:33:20,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745677566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:20,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:20,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:20,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164554498] [2024-06-04 15:33:20,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:20,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:20,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:20,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:20,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:33:20,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:20,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:20,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:33:20,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:20,664 INFO L124 PetriNetUnfolderBase]: 1623/2424 cut-off events. [2024-06-04 15:33:20,664 INFO L125 PetriNetUnfolderBase]: For 2223/2223 co-relation queries the response was YES. [2024-06-04 15:33:20,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6782 conditions, 2424 events. 1623/2424 cut-off events. For 2223/2223 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10903 event pairs, 579 based on Foata normal form. 6/2428 useless extension candidates. Maximal degree in co-relation 6761. Up to 2336 conditions per place. [2024-06-04 15:33:20,681 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 57 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-04 15:33:20,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 410 flow [2024-06-04 15:33:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-04 15:33:20,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-04 15:33:20,684 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 198 flow. Second operand 6 states and 117 transitions. [2024-06-04 15:33:20,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 410 flow [2024-06-04 15:33:20,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 388 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:20,688 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 217 flow [2024-06-04 15:33:20,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=217, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-04 15:33:20,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-04 15:33:20,689 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 217 flow [2024-06-04 15:33:20,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:20,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:20,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:20,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:33:20,690 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 15:33:20,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1906018500, now seen corresponding path program 1 times [2024-06-04 15:33:20,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:20,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861158574] [2024-06-04 15:33:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:20,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:21,496 INFO 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 15:33:21,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:21,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861158574] [2024-06-04 15:33:21,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861158574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:21,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:21,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:33:21,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114541915] [2024-06-04 15:33:21,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:21,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:33:21,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:21,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:33:21,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:33:21,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:33:21,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:21,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:21,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:33:21,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:21,974 INFO L124 PetriNetUnfolderBase]: 1245/1944 cut-off events. [2024-06-04 15:33:21,975 INFO L125 PetriNetUnfolderBase]: For 2900/2936 co-relation queries the response was YES. [2024-06-04 15:33:21,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5724 conditions, 1944 events. 1245/1944 cut-off events. For 2900/2936 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9317 event pairs, 585 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 5702. Up to 1826 conditions per place. [2024-06-04 15:33:21,990 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2024-06-04 15:33:21,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 379 flow [2024-06-04 15:33:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:33:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:33:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-04 15:33:21,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-04 15:33:21,994 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 217 flow. Second operand 5 states and 91 transitions. [2024-06-04 15:33:21,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 379 flow [2024-06-04 15:33:21,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 348 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:22,002 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 257 flow [2024-06-04 15:33:22,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-04 15:33:22,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-04 15:33:22,006 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 257 flow [2024-06-04 15:33:22,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:22,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:22,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:22,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:33:22,011 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 15:33:22,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1081397346, now seen corresponding path program 1 times [2024-06-04 15:33:22,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:22,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862460628] [2024-06-04 15:33:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:22,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:22,905 INFO 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 15:33:22,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:22,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862460628] [2024-06-04 15:33:22,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862460628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:22,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:22,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:22,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585098534] [2024-06-04 15:33:22,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:22,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:22,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:22,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:22,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:22,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:22,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:22,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:22,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:22,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:23,378 INFO L124 PetriNetUnfolderBase]: 1626/2432 cut-off events. [2024-06-04 15:33:23,378 INFO L125 PetriNetUnfolderBase]: For 4631/4641 co-relation queries the response was YES. [2024-06-04 15:33:23,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7868 conditions, 2432 events. 1626/2432 cut-off events. For 4631/4641 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10910 event pairs, 734 based on Foata normal form. 12/2441 useless extension candidates. Maximal degree in co-relation 7843. Up to 2346 conditions per place. [2024-06-04 15:33:23,399 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-04 15:33:23,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 519 flow [2024-06-04 15:33:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 15:33:23,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:33:23,401 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 257 flow. Second operand 6 states and 102 transitions. [2024-06-04 15:33:23,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 519 flow [2024-06-04 15:33:23,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 502 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 15:33:23,409 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 348 flow [2024-06-04 15:33:23,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-06-04 15:33:23,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-04 15:33:23,412 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 348 flow [2024-06-04 15:33:23,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:23,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:23,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:23,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:33:23,413 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 15:33:23,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2129436313, now seen corresponding path program 1 times [2024-06-04 15:33:23,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:23,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644432048] [2024-06-04 15:33:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:23,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:24,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:24,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644432048] [2024-06-04 15:33:24,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644432048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:24,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:24,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:24,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179885299] [2024-06-04 15:33:24,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:24,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:24,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:24,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:24,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 348 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:24,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:24,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:24,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:24,822 INFO L124 PetriNetUnfolderBase]: 1649/2466 cut-off events. [2024-06-04 15:33:24,822 INFO L125 PetriNetUnfolderBase]: For 6739/6739 co-relation queries the response was YES. [2024-06-04 15:33:24,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8893 conditions, 2466 events. 1649/2466 cut-off events. For 6739/6739 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11011 event pairs, 758 based on Foata normal form. 2/2466 useless extension candidates. Maximal degree in co-relation 8865. Up to 2422 conditions per place. [2024-06-04 15:33:24,847 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 70 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2024-06-04 15:33:24,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 630 flow [2024-06-04 15:33:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 15:33:24,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-04 15:33:24,850 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 348 flow. Second operand 7 states and 114 transitions. [2024-06-04 15:33:24,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 630 flow [2024-06-04 15:33:24,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 601 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-04 15:33:24,859 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 429 flow [2024-06-04 15:33:24,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-04 15:33:24,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-04 15:33:24,860 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 429 flow [2024-06-04 15:33:24,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:24,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:24,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:24,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:33:24,861 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 15:33:24,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:24,862 INFO L85 PathProgramCache]: Analyzing trace with hash 830700505, now seen corresponding path program 2 times [2024-06-04 15:33:24,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:24,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307501194] [2024-06-04 15:33:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:24,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:25,699 INFO 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 15:33:25,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:25,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307501194] [2024-06-04 15:33:25,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307501194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:25,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:25,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:25,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230072379] [2024-06-04 15:33:25,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:25,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:25,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:25,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:25,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:25,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:25,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:25,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:26,338 INFO L124 PetriNetUnfolderBase]: 1660/2482 cut-off events. [2024-06-04 15:33:26,338 INFO L125 PetriNetUnfolderBase]: For 8271/8271 co-relation queries the response was YES. [2024-06-04 15:33:26,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9215 conditions, 2482 events. 1660/2482 cut-off events. For 8271/8271 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11094 event pairs, 754 based on Foata normal form. 2/2482 useless extension candidates. Maximal degree in co-relation 9184. Up to 2429 conditions per place. [2024-06-04 15:33:26,356 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 68 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2024-06-04 15:33:26,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 681 flow [2024-06-04 15:33:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-04 15:33:26,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:33:26,361 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 429 flow. Second operand 6 states and 99 transitions. [2024-06-04 15:33:26,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 681 flow [2024-06-04 15:33:26,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 640 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:26,372 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 470 flow [2024-06-04 15:33:26,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2024-06-04 15:33:26,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-04 15:33:26,374 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 470 flow [2024-06-04 15:33:26,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:26,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:26,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:26,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:33:26,375 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 15:33:26,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:26,375 INFO L85 PathProgramCache]: Analyzing trace with hash -807277655, now seen corresponding path program 3 times [2024-06-04 15:33:26,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:26,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914200309] [2024-06-04 15:33:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:26,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:27,228 INFO 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 15:33:27,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914200309] [2024-06-04 15:33:27,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914200309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:27,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:27,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:27,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246165971] [2024-06-04 15:33:27,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:27,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:27,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:27,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:27,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:27,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:27,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:27,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:27,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:27,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:27,773 INFO L124 PetriNetUnfolderBase]: 1647/2465 cut-off events. [2024-06-04 15:33:27,773 INFO L125 PetriNetUnfolderBase]: For 9962/9972 co-relation queries the response was YES. [2024-06-04 15:33:27,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9378 conditions, 2465 events. 1647/2465 cut-off events. For 9962/9972 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11068 event pairs, 759 based on Foata normal form. 12/2473 useless extension candidates. Maximal degree in co-relation 9347. Up to 2355 conditions per place. [2024-06-04 15:33:27,789 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 61 selfloop transitions, 24 changer transitions 0/88 dead transitions. [2024-06-04 15:33:27,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 703 flow [2024-06-04 15:33:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-04 15:33:27,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-04 15:33:27,793 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 470 flow. Second operand 6 states and 100 transitions. [2024-06-04 15:33:27,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 703 flow [2024-06-04 15:33:27,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 647 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 15:33:27,806 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 505 flow [2024-06-04 15:33:27,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=505, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-04 15:33:27,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-04 15:33:27,808 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 505 flow [2024-06-04 15:33:27,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:27,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:27,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:27,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:33:27,809 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:27,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:27,809 INFO L85 PathProgramCache]: Analyzing trace with hash 836422361, now seen corresponding path program 1 times [2024-06-04 15:33:27,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:27,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680122541] [2024-06-04 15:33:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:27,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:28,909 INFO 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 15:33:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:28,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680122541] [2024-06-04 15:33:28,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680122541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:28,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:28,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:28,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130271462] [2024-06-04 15:33:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:28,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:28,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:28,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:28,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 505 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:28,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:28,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:28,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:29,552 INFO L124 PetriNetUnfolderBase]: 1713/2565 cut-off events. [2024-06-04 15:33:29,553 INFO L125 PetriNetUnfolderBase]: For 10181/10185 co-relation queries the response was YES. [2024-06-04 15:33:29,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9744 conditions, 2565 events. 1713/2565 cut-off events. For 10181/10185 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11545 event pairs, 506 based on Foata normal form. 12/2572 useless extension candidates. Maximal degree in co-relation 9711. Up to 2263 conditions per place. [2024-06-04 15:33:29,570 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 74 selfloop transitions, 35 changer transitions 0/112 dead transitions. [2024-06-04 15:33:29,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 927 flow [2024-06-04 15:33:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:33:29,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-04 15:33:29,573 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 505 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:33:29,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 927 flow [2024-06-04 15:33:29,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 112 transitions, 891 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:29,585 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 648 flow [2024-06-04 15:33:29,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=648, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-06-04 15:33:29,586 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-04 15:33:29,586 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 648 flow [2024-06-04 15:33:29,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:29,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:29,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:29,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:33:29,587 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 15:33:29,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:29,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2009442793, now seen corresponding path program 1 times [2024-06-04 15:33:29,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:29,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975419331] [2024-06-04 15:33:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:29,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:30,422 INFO 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 15:33:30,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:30,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975419331] [2024-06-04 15:33:30,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975419331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:30,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:30,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:30,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179134840] [2024-06-04 15:33:30,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:30,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:30,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:30,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:30,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:30,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:30,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 648 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:30,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:30,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:30,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:31,055 INFO L124 PetriNetUnfolderBase]: 1747/2612 cut-off events. [2024-06-04 15:33:31,055 INFO L125 PetriNetUnfolderBase]: For 13418/13418 co-relation queries the response was YES. [2024-06-04 15:33:31,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11144 conditions, 2612 events. 1747/2612 cut-off events. For 13418/13418 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11775 event pairs, 503 based on Foata normal form. 4/2614 useless extension candidates. Maximal degree in co-relation 11109. Up to 2510 conditions per place. [2024-06-04 15:33:31,078 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 97 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-04 15:33:31,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 1045 flow [2024-06-04 15:33:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:31,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 15:33:31,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-04 15:33:31,080 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 648 flow. Second operand 8 states and 133 transitions. [2024-06-04 15:33:31,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 1045 flow [2024-06-04 15:33:31,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 125 transitions, 1011 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-04 15:33:31,098 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 763 flow [2024-06-04 15:33:31,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=763, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2024-06-04 15:33:31,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-04 15:33:31,099 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 763 flow [2024-06-04 15:33:31,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:31,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:31,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:31,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:33:31,100 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 15:33:31,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash 739436373, now seen corresponding path program 2 times [2024-06-04 15:33:31,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:31,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583064377] [2024-06-04 15:33:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:31,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583064377] [2024-06-04 15:33:31,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583064377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:31,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:31,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:31,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029081586] [2024-06-04 15:33:31,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:31,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:32,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:32,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 763 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:32,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:32,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:32,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:32,615 INFO L124 PetriNetUnfolderBase]: 1769/2644 cut-off events. [2024-06-04 15:33:32,616 INFO L125 PetriNetUnfolderBase]: For 16332/16332 co-relation queries the response was YES. [2024-06-04 15:33:32,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12025 conditions, 2644 events. 1769/2644 cut-off events. For 16332/16332 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11901 event pairs, 500 based on Foata normal form. 4/2646 useless extension candidates. Maximal degree in co-relation 11986. Up to 2524 conditions per place. [2024-06-04 15:33:32,637 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 26 changer transitions 0/124 dead transitions. [2024-06-04 15:33:32,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 1130 flow [2024-06-04 15:33:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 15:33:32,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-04 15:33:32,640 INFO L175 Difference]: Start difference. First operand has 83 places, 96 transitions, 763 flow. Second operand 7 states and 118 transitions. [2024-06-04 15:33:32,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 1130 flow [2024-06-04 15:33:32,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 1092 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:32,658 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 828 flow [2024-06-04 15:33:32,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=828, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-04 15:33:32,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-04 15:33:32,659 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 828 flow [2024-06-04 15:33:32,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:32,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:32,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:32,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:33:32,660 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 15:33:32,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:32,661 INFO L85 PathProgramCache]: Analyzing trace with hash 739556343, now seen corresponding path program 3 times [2024-06-04 15:33:32,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:32,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543641352] [2024-06-04 15:33:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:32,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:33,489 INFO 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 15:33:33,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:33,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543641352] [2024-06-04 15:33:33,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543641352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:33,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:33,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:33,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152507591] [2024-06-04 15:33:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:33,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:33,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:33,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:33,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:33,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 828 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:33,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:33,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:33,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:34,101 INFO L124 PetriNetUnfolderBase]: 1807/2699 cut-off events. [2024-06-04 15:33:34,101 INFO L125 PetriNetUnfolderBase]: For 19456/19456 co-relation queries the response was YES. [2024-06-04 15:33:34,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12719 conditions, 2699 events. 1807/2699 cut-off events. For 19456/19456 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12149 event pairs, 499 based on Foata normal form. 4/2701 useless extension candidates. Maximal degree in co-relation 12679. Up to 2527 conditions per place. [2024-06-04 15:33:34,122 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-04 15:33:34,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 131 transitions, 1302 flow [2024-06-04 15:33:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:34,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 15:33:34,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-04 15:33:34,124 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 828 flow. Second operand 7 states and 120 transitions. [2024-06-04 15:33:34,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 131 transitions, 1302 flow [2024-06-04 15:33:34,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 131 transitions, 1220 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:34,150 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 911 flow [2024-06-04 15:33:34,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-04 15:33:34,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-04 15:33:34,152 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 911 flow [2024-06-04 15:33:34,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:34,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:34,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:34,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:33:34,153 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:34,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 159044901, now seen corresponding path program 4 times [2024-06-04 15:33:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:34,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97496919] [2024-06-04 15:33:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:35,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:35,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97496919] [2024-06-04 15:33:35,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97496919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:35,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:35,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:35,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302491075] [2024-06-04 15:33:35,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:35,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:35,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:35,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:35,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:35,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:35,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 911 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:35,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:35,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:35,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:35,612 INFO L124 PetriNetUnfolderBase]: 1847/2764 cut-off events. [2024-06-04 15:33:35,613 INFO L125 PetriNetUnfolderBase]: For 20161/20174 co-relation queries the response was YES. [2024-06-04 15:33:35,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12845 conditions, 2764 events. 1847/2764 cut-off events. For 20161/20174 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12593 event pairs, 506 based on Foata normal form. 18/2776 useless extension candidates. Maximal degree in co-relation 12804. Up to 2287 conditions per place. [2024-06-04 15:33:35,633 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 86 selfloop transitions, 52 changer transitions 0/141 dead transitions. [2024-06-04 15:33:35,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 1437 flow [2024-06-04 15:33:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 15:33:35,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-04 15:33:35,635 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 911 flow. Second operand 7 states and 129 transitions. [2024-06-04 15:33:35,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 1437 flow [2024-06-04 15:33:35,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 141 transitions, 1401 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:35,665 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 1079 flow [2024-06-04 15:33:35,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1079, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-04 15:33:35,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-04 15:33:35,666 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 1079 flow [2024-06-04 15:33:35,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:35,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:35,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:35,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:33:35,667 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 15:33:35,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:35,668 INFO L85 PathProgramCache]: Analyzing trace with hash 159291165, now seen corresponding path program 1 times [2024-06-04 15:33:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:35,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345957419] [2024-06-04 15:33:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:36,706 INFO 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 15:33:36,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:36,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345957419] [2024-06-04 15:33:36,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345957419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:36,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:36,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:36,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732885035] [2024-06-04 15:33:36,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:36,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:36,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:36,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:36,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 1079 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:36,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:36,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:36,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:37,351 INFO L124 PetriNetUnfolderBase]: 1947/2940 cut-off events. [2024-06-04 15:33:37,352 INFO L125 PetriNetUnfolderBase]: For 25122/25135 co-relation queries the response was YES. [2024-06-04 15:33:37,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14460 conditions, 2940 events. 1947/2940 cut-off events. For 25122/25135 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13703 event pairs, 446 based on Foata normal form. 34/2968 useless extension candidates. Maximal degree in co-relation 14416. Up to 2366 conditions per place. [2024-06-04 15:33:37,374 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 96 selfloop transitions, 54 changer transitions 0/153 dead transitions. [2024-06-04 15:33:37,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 153 transitions, 1639 flow [2024-06-04 15:33:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:33:37,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-04 15:33:37,376 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 1079 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:33:37,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 153 transitions, 1639 flow [2024-06-04 15:33:37,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 1562 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:37,417 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 1157 flow [2024-06-04 15:33:37,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1157, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2024-06-04 15:33:37,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-04 15:33:37,418 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 1157 flow [2024-06-04 15:33:37,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:37,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:37,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:33:37,418 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 15:33:37,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash -821612956, now seen corresponding path program 1 times [2024-06-04 15:33:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:37,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972166675] [2024-06-04 15:33:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:38,466 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 15:33:38,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:38,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972166675] [2024-06-04 15:33:38,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972166675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:38,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:38,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583160035] [2024-06-04 15:33:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:38,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:38,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:38,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:38,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:38,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 1157 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:38,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:38,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:38,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:39,128 INFO L124 PetriNetUnfolderBase]: 1970/2971 cut-off events. [2024-06-04 15:33:39,128 INFO L125 PetriNetUnfolderBase]: For 26814/26814 co-relation queries the response was YES. [2024-06-04 15:33:39,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15263 conditions, 2971 events. 1970/2971 cut-off events. For 26814/26814 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13920 event pairs, 525 based on Foata normal form. 2/2971 useless extension candidates. Maximal degree in co-relation 15218. Up to 2853 conditions per place. [2024-06-04 15:33:39,149 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 120 selfloop transitions, 31 changer transitions 0/154 dead transitions. [2024-06-04 15:33:39,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 154 transitions, 1646 flow [2024-06-04 15:33:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:33:39,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-04 15:33:39,153 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 1157 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:33:39,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 154 transitions, 1646 flow [2024-06-04 15:33:39,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 154 transitions, 1515 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:39,199 INFO L231 Difference]: Finished difference. Result has 102 places, 126 transitions, 1210 flow [2024-06-04 15:33:39,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1210, PETRI_PLACES=102, PETRI_TRANSITIONS=126} [2024-06-04 15:33:39,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-04 15:33:39,200 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 126 transitions, 1210 flow [2024-06-04 15:33:39,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:39,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:39,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:39,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:33:39,202 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 15:33:39,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash -564492936, now seen corresponding path program 2 times [2024-06-04 15:33:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:39,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825119967] [2024-06-04 15:33:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:40,221 INFO 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 15:33:40,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:40,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825119967] [2024-06-04 15:33:40,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825119967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:40,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:40,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:40,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422556301] [2024-06-04 15:33:40,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:40,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:40,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:40,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:40,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:40,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:40,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 1210 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:40,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:40,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:40,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:40,862 INFO L124 PetriNetUnfolderBase]: 1965/2964 cut-off events. [2024-06-04 15:33:40,862 INFO L125 PetriNetUnfolderBase]: For 29237/29237 co-relation queries the response was YES. [2024-06-04 15:33:40,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15197 conditions, 2964 events. 1965/2964 cut-off events. For 29237/29237 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13869 event pairs, 522 based on Foata normal form. 2/2964 useless extension candidates. Maximal degree in co-relation 15150. Up to 2819 conditions per place. [2024-06-04 15:33:40,879 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 114 selfloop transitions, 33 changer transitions 0/150 dead transitions. [2024-06-04 15:33:40,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 150 transitions, 1600 flow [2024-06-04 15:33:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 15:33:40,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-04 15:33:40,881 INFO L175 Difference]: Start difference. First operand has 102 places, 126 transitions, 1210 flow. Second operand 7 states and 118 transitions. [2024-06-04 15:33:40,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 150 transitions, 1600 flow [2024-06-04 15:33:40,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 150 transitions, 1530 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:40,925 INFO L231 Difference]: Finished difference. Result has 104 places, 126 transitions, 1226 flow [2024-06-04 15:33:40,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=104, PETRI_TRANSITIONS=126} [2024-06-04 15:33:40,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-04 15:33:40,926 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 126 transitions, 1226 flow [2024-06-04 15:33:40,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:40,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:40,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:40,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:33:40,928 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 15:33:40,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1447692771, now seen corresponding path program 1 times [2024-06-04 15:33:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:40,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273843503] [2024-06-04 15:33:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:40,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:41,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:41,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273843503] [2024-06-04 15:33:41,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273843503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:41,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:41,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:41,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819166706] [2024-06-04 15:33:41,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:41,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:41,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:41,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:41,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:41,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:41,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 126 transitions, 1226 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:41,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:41,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:41,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:42,319 INFO L124 PetriNetUnfolderBase]: 1987/2999 cut-off events. [2024-06-04 15:33:42,319 INFO L125 PetriNetUnfolderBase]: For 33100/33117 co-relation queries the response was YES. [2024-06-04 15:33:42,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15627 conditions, 2999 events. 1987/2999 cut-off events. For 33100/33117 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14096 event pairs, 528 based on Foata normal form. 18/3012 useless extension candidates. Maximal degree in co-relation 15579. Up to 2836 conditions per place. [2024-06-04 15:33:42,338 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 118 selfloop transitions, 31 changer transitions 0/152 dead transitions. [2024-06-04 15:33:42,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1647 flow [2024-06-04 15:33:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:33:42,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-04 15:33:42,339 INFO L175 Difference]: Start difference. First operand has 104 places, 126 transitions, 1226 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:33:42,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1647 flow [2024-06-04 15:33:42,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 152 transitions, 1561 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:42,368 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1244 flow [2024-06-04 15:33:42,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1244, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-04 15:33:42,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-04 15:33:42,369 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1244 flow [2024-06-04 15:33:42,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:42,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:42,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:42,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:33:42,370 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 15:33:42,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:42,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1009631325, now seen corresponding path program 2 times [2024-06-04 15:33:42,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:42,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675788483] [2024-06-04 15:33:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:42,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:43,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:43,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675788483] [2024-06-04 15:33:43,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675788483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:43,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:43,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:43,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338814438] [2024-06-04 15:33:43,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:43,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:43,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:43,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:43,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:43,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:43,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1244 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:43,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:43,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:43,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:43,782 INFO L124 PetriNetUnfolderBase]: 2025/3055 cut-off events. [2024-06-04 15:33:43,782 INFO L125 PetriNetUnfolderBase]: For 30803/30816 co-relation queries the response was YES. [2024-06-04 15:33:43,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 3055 events. 2025/3055 cut-off events. For 30803/30816 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14376 event pairs, 528 based on Foata normal form. 10/3059 useless extension candidates. Maximal degree in co-relation 15693. Up to 2503 conditions per place. [2024-06-04 15:33:43,796 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 92 selfloop transitions, 66 changer transitions 0/161 dead transitions. [2024-06-04 15:33:43,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 161 transitions, 1842 flow [2024-06-04 15:33:43,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 15:33:43,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:33:43,797 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1244 flow. Second operand 7 states and 126 transitions. [2024-06-04 15:33:43,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 161 transitions, 1842 flow [2024-06-04 15:33:43,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1775 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:43,820 INFO L231 Difference]: Finished difference. Result has 107 places, 135 transitions, 1386 flow [2024-06-04 15:33:43,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1386, PETRI_PLACES=107, PETRI_TRANSITIONS=135} [2024-06-04 15:33:43,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-04 15:33:43,821 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 135 transitions, 1386 flow [2024-06-04 15:33:43,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:43,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:43,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:43,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:33:43,822 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 15:33:43,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:43,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1009636905, now seen corresponding path program 3 times [2024-06-04 15:33:43,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:43,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29593767] [2024-06-04 15:33:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:43,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:44,579 INFO 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 15:33:44,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:44,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29593767] [2024-06-04 15:33:44,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29593767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:44,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:44,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:44,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442316080] [2024-06-04 15:33:44,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:44,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:44,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:44,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:44,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:44,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:44,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 135 transitions, 1386 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:44,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:44,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:44,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:45,162 INFO L124 PetriNetUnfolderBase]: 1998/3014 cut-off events. [2024-06-04 15:33:45,162 INFO L125 PetriNetUnfolderBase]: For 33577/33590 co-relation queries the response was YES. [2024-06-04 15:33:45,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15921 conditions, 3014 events. 1998/3014 cut-off events. For 33577/33590 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14099 event pairs, 530 based on Foata normal form. 14/3022 useless extension candidates. Maximal degree in co-relation 15871. Up to 2480 conditions per place. [2024-06-04 15:33:45,180 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 88 selfloop transitions, 70 changer transitions 0/161 dead transitions. [2024-06-04 15:33:45,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1926 flow [2024-06-04 15:33:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-04 15:33:45,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-04 15:33:45,183 INFO L175 Difference]: Start difference. First operand has 107 places, 135 transitions, 1386 flow. Second operand 7 states and 128 transitions. [2024-06-04 15:33:45,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1926 flow [2024-06-04 15:33:45,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1818 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-04 15:33:45,226 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1430 flow [2024-06-04 15:33:45,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1430, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-04 15:33:45,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-04 15:33:45,227 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1430 flow [2024-06-04 15:33:45,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:45,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:45,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:45,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:33:45,228 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:45,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:45,228 INFO L85 PathProgramCache]: Analyzing trace with hash 635641370, now seen corresponding path program 1 times [2024-06-04 15:33:45,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:45,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003451643] [2024-06-04 15:33:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:45,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:46,086 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 15:33:46,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:46,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003451643] [2024-06-04 15:33:46,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003451643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:46,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:46,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:33:46,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550532075] [2024-06-04 15:33:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:46,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:33:46,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:33:46,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:33:46,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:46,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1430 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:46,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:46,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:46,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:46,649 INFO L124 PetriNetUnfolderBase]: 1987/2996 cut-off events. [2024-06-04 15:33:46,649 INFO L125 PetriNetUnfolderBase]: For 36470/36483 co-relation queries the response was YES. [2024-06-04 15:33:46,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16065 conditions, 2996 events. 1987/2996 cut-off events. For 36470/36483 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14055 event pairs, 543 based on Foata normal form. 12/3004 useless extension candidates. Maximal degree in co-relation 16014. Up to 2849 conditions per place. [2024-06-04 15:33:46,669 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 128 selfloop transitions, 31 changer transitions 0/162 dead transitions. [2024-06-04 15:33:46,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 162 transitions, 1890 flow [2024-06-04 15:33:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:33:46,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-04 15:33:46,670 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1430 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:33:46,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 162 transitions, 1890 flow [2024-06-04 15:33:46,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 162 transitions, 1713 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:46,729 INFO L231 Difference]: Finished difference. Result has 114 places, 139 transitions, 1385 flow [2024-06-04 15:33:46,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1385, PETRI_PLACES=114, PETRI_TRANSITIONS=139} [2024-06-04 15:33:46,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-04 15:33:46,730 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 139 transitions, 1385 flow [2024-06-04 15:33:46,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:46,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:46,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:46,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:33:46,731 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 15:33:46,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1456217790, now seen corresponding path program 1 times [2024-06-04 15:33:46,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:46,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462898797] [2024-06-04 15:33:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:46,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:47,835 INFO 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 15:33:47,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462898797] [2024-06-04 15:33:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462898797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:47,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:47,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789226838] [2024-06-04 15:33:47,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:47,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:47,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:47,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:47,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 139 transitions, 1385 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 15:33:47,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:47,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:47,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:48,547 INFO L124 PetriNetUnfolderBase]: 2004/3022 cut-off events. [2024-06-04 15:33:48,547 INFO L125 PetriNetUnfolderBase]: For 39310/39310 co-relation queries the response was YES. [2024-06-04 15:33:48,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16232 conditions, 3022 events. 2004/3022 cut-off events. For 39310/39310 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14184 event pairs, 368 based on Foata normal form. 4/3024 useless extension candidates. Maximal degree in co-relation 16179. Up to 2870 conditions per place. [2024-06-04 15:33:48,565 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-04 15:33:48,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1851 flow [2024-06-04 15:33:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:33:48,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-04 15:33:48,566 INFO L175 Difference]: Start difference. First operand has 114 places, 139 transitions, 1385 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:33:48,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1851 flow [2024-06-04 15:33:48,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 170 transitions, 1783 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 15:33:48,605 INFO L231 Difference]: Finished difference. Result has 117 places, 141 transitions, 1400 flow [2024-06-04 15:33:48,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=117, PETRI_TRANSITIONS=141} [2024-06-04 15:33:48,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-04 15:33:48,606 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 141 transitions, 1400 flow [2024-06-04 15:33:48,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 15:33:48,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:48,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:48,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:33:48,606 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 15:33:48,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:48,606 INFO L85 PathProgramCache]: Analyzing trace with hash -319410268, now seen corresponding path program 2 times [2024-06-04 15:33:48,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:48,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054041349] [2024-06-04 15:33:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:48,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:49,706 INFO 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 15:33:49,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:49,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054041349] [2024-06-04 15:33:49,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054041349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:49,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:49,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:49,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082651428] [2024-06-04 15:33:49,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:49,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:49,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:49,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:49,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:49,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 141 transitions, 1400 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 15:33:49,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:49,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:49,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:50,448 INFO L124 PetriNetUnfolderBase]: 2021/3047 cut-off events. [2024-06-04 15:33:50,449 INFO L125 PetriNetUnfolderBase]: For 43413/43413 co-relation queries the response was YES. [2024-06-04 15:33:50,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16701 conditions, 3047 events. 2021/3047 cut-off events. For 43413/43413 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14330 event pairs, 483 based on Foata normal form. 4/3049 useless extension candidates. Maximal degree in co-relation 16647. Up to 2869 conditions per place. [2024-06-04 15:33:50,468 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 35 changer transitions 0/172 dead transitions. [2024-06-04 15:33:50,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 172 transitions, 1878 flow [2024-06-04 15:33:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 15:33:50,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:33:50,470 INFO L175 Difference]: Start difference. First operand has 117 places, 141 transitions, 1400 flow. Second operand 8 states and 132 transitions. [2024-06-04 15:33:50,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 172 transitions, 1878 flow [2024-06-04 15:33:50,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 172 transitions, 1813 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:50,517 INFO L231 Difference]: Finished difference. Result has 119 places, 143 transitions, 1445 flow [2024-06-04 15:33:50,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1445, PETRI_PLACES=119, PETRI_TRANSITIONS=143} [2024-06-04 15:33:50,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-04 15:33:50,518 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 143 transitions, 1445 flow [2024-06-04 15:33:50,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 15:33:50,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:50,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:50,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:33:50,519 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 15:33:50,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:50,520 INFO L85 PathProgramCache]: Analyzing trace with hash -319410144, now seen corresponding path program 1 times [2024-06-04 15:33:50,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:50,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219945838] [2024-06-04 15:33:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:50,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:51,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:51,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219945838] [2024-06-04 15:33:51,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219945838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:51,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:51,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:51,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255347002] [2024-06-04 15:33:51,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:51,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:51,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:51,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 143 transitions, 1445 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 15:33:51,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:51,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:51,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:52,091 INFO L124 PetriNetUnfolderBase]: 2001/3009 cut-off events. [2024-06-04 15:33:52,091 INFO L125 PetriNetUnfolderBase]: For 47591/47604 co-relation queries the response was YES. [2024-06-04 15:33:52,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16867 conditions, 3009 events. 2001/3009 cut-off events. For 47591/47604 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14030 event pairs, 480 based on Foata normal form. 12/3017 useless extension candidates. Maximal degree in co-relation 16812. Up to 2815 conditions per place. [2024-06-04 15:33:52,108 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 125 selfloop transitions, 38 changer transitions 0/166 dead transitions. [2024-06-04 15:33:52,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 166 transitions, 1867 flow [2024-06-04 15:33:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:33:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:33:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:33:52,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-04 15:33:52,110 INFO L175 Difference]: Start difference. First operand has 119 places, 143 transitions, 1445 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:33:52,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 166 transitions, 1867 flow [2024-06-04 15:33:52,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 166 transitions, 1775 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:52,151 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1443 flow [2024-06-04 15:33:52,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1443, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-04 15:33:52,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-04 15:33:52,151 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1443 flow [2024-06-04 15:33:52,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 15:33:52,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:52,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:52,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:33:52,152 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 15:33:52,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:52,153 INFO L85 PathProgramCache]: Analyzing trace with hash -333737722, now seen corresponding path program 3 times [2024-06-04 15:33:52,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:52,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763380063] [2024-06-04 15:33:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:52,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:53,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:53,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763380063] [2024-06-04 15:33:53,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763380063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:53,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:53,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:53,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235607034] [2024-06-04 15:33:53,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:53,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:53,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:53,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:53,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1443 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 15:33:53,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:53,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:53,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:54,019 INFO L124 PetriNetUnfolderBase]: 2018/3034 cut-off events. [2024-06-04 15:33:54,019 INFO L125 PetriNetUnfolderBase]: For 52020/52020 co-relation queries the response was YES. [2024-06-04 15:33:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17206 conditions, 3034 events. 2018/3034 cut-off events. For 52020/52020 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14159 event pairs, 470 based on Foata normal form. 4/3036 useless extension candidates. Maximal degree in co-relation 17150. Up to 2830 conditions per place. [2024-06-04 15:33:54,038 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 128 selfloop transitions, 42 changer transitions 0/173 dead transitions. [2024-06-04 15:33:54,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 173 transitions, 1927 flow [2024-06-04 15:33:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 15:33:54,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:33:54,039 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1443 flow. Second operand 8 states and 132 transitions. [2024-06-04 15:33:54,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 173 transitions, 1927 flow [2024-06-04 15:33:54,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 173 transitions, 1781 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 15:33:54,083 INFO L231 Difference]: Finished difference. Result has 121 places, 145 transitions, 1422 flow [2024-06-04 15:33:54,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1422, PETRI_PLACES=121, PETRI_TRANSITIONS=145} [2024-06-04 15:33:54,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-04 15:33:54,084 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 145 transitions, 1422 flow [2024-06-04 15:33:54,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 15:33:54,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:54,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:54,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:33:54,085 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:33:54,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash 209305566, now seen corresponding path program 1 times [2024-06-04 15:33:54,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:54,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510620301] [2024-06-04 15:33:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:54,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:54,868 INFO 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 15:33:54,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:54,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510620301] [2024-06-04 15:33:54,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510620301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:54,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:54,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:33:54,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902234453] [2024-06-04 15:33:54,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:54,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:33:54,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:33:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:33:54,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:54,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 145 transitions, 1422 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:54,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:54,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:54,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:55,455 INFO L124 PetriNetUnfolderBase]: 2023/3042 cut-off events. [2024-06-04 15:33:55,455 INFO L125 PetriNetUnfolderBase]: For 51773/51773 co-relation queries the response was YES. [2024-06-04 15:33:55,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17293 conditions, 3042 events. 2023/3042 cut-off events. For 51773/51773 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14224 event pairs, 489 based on Foata normal form. 1/3041 useless extension candidates. Maximal degree in co-relation 17236. Up to 2990 conditions per place. [2024-06-04 15:33:55,475 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 147 selfloop transitions, 19 changer transitions 0/169 dead transitions. [2024-06-04 15:33:55,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 169 transitions, 1918 flow [2024-06-04 15:33:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:33:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:33:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-04 15:33:55,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-04 15:33:55,477 INFO L175 Difference]: Start difference. First operand has 121 places, 145 transitions, 1422 flow. Second operand 6 states and 98 transitions. [2024-06-04 15:33:55,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 169 transitions, 1918 flow [2024-06-04 15:33:55,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1811 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:55,529 INFO L231 Difference]: Finished difference. Result has 122 places, 154 transitions, 1444 flow [2024-06-04 15:33:55,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=122, PETRI_TRANSITIONS=154} [2024-06-04 15:33:55,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-04 15:33:55,529 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 154 transitions, 1444 flow [2024-06-04 15:33:55,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:33:55,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:55,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:55,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:33:55,530 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 15:33:55,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:55,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1776623708, now seen corresponding path program 4 times [2024-06-04 15:33:55,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:55,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904374553] [2024-06-04 15:33:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:55,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:33:56,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:56,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904374553] [2024-06-04 15:33:56,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904374553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:56,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:56,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:33:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137977800] [2024-06-04 15:33:56,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:56,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:33:56,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:33:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:33:56,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:56,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 154 transitions, 1444 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 15:33:56,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:56,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:56,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:57,326 INFO L124 PetriNetUnfolderBase]: 2032/3060 cut-off events. [2024-06-04 15:33:57,326 INFO L125 PetriNetUnfolderBase]: For 56687/56703 co-relation queries the response was YES. [2024-06-04 15:33:57,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17567 conditions, 3060 events. 2032/3060 cut-off events. For 56687/56703 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14254 event pairs, 485 based on Foata normal form. 15/3069 useless extension candidates. Maximal degree in co-relation 17508. Up to 2645 conditions per place. [2024-06-04 15:33:57,344 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 122 selfloop transitions, 58 changer transitions 0/183 dead transitions. [2024-06-04 15:33:57,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 183 transitions, 1952 flow [2024-06-04 15:33:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:33:57,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-04 15:33:57,345 INFO L175 Difference]: Start difference. First operand has 122 places, 154 transitions, 1444 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:33:57,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 183 transitions, 1952 flow [2024-06-04 15:33:57,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 183 transitions, 1930 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-04 15:33:57,397 INFO L231 Difference]: Finished difference. Result has 129 places, 157 transitions, 1592 flow [2024-06-04 15:33:57,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1592, PETRI_PLACES=129, PETRI_TRANSITIONS=157} [2024-06-04 15:33:57,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-04 15:33:57,397 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 157 transitions, 1592 flow [2024-06-04 15:33:57,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 15:33:57,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:57,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:57,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:33:57,398 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 15:33:57,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:57,398 INFO L85 PathProgramCache]: Analyzing trace with hash 417172692, now seen corresponding path program 1 times [2024-06-04 15:33:57,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:57,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373013319] [2024-06-04 15:33:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:58,199 INFO 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 15:33:58,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373013319] [2024-06-04 15:33:58,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373013319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:58,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:58,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:58,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438956752] [2024-06-04 15:33:58,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:58,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:58,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:58,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:33:58,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:33:58,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 157 transitions, 1592 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 15:33:58,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:33:58,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:33:58,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:33:58,883 INFO L124 PetriNetUnfolderBase]: 2060/3103 cut-off events. [2024-06-04 15:33:58,883 INFO L125 PetriNetUnfolderBase]: For 62225/62241 co-relation queries the response was YES. [2024-06-04 15:33:58,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18544 conditions, 3103 events. 2060/3103 cut-off events. For 62225/62241 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14488 event pairs, 485 based on Foata normal form. 11/3108 useless extension candidates. Maximal degree in co-relation 18482. Up to 2593 conditions per place. [2024-06-04 15:33:58,906 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 119 selfloop transitions, 68 changer transitions 0/190 dead transitions. [2024-06-04 15:33:58,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 190 transitions, 2222 flow [2024-06-04 15:33:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:33:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:33:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 15:33:58,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:33:58,907 INFO L175 Difference]: Start difference. First operand has 129 places, 157 transitions, 1592 flow. Second operand 8 states and 136 transitions. [2024-06-04 15:33:58,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 190 transitions, 2222 flow [2024-06-04 15:33:58,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 190 transitions, 2045 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:33:58,966 INFO L231 Difference]: Finished difference. Result has 131 places, 162 transitions, 1620 flow [2024-06-04 15:33:58,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1620, PETRI_PLACES=131, PETRI_TRANSITIONS=162} [2024-06-04 15:33:58,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-04 15:33:58,967 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 162 transitions, 1620 flow [2024-06-04 15:33:58,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 15:33:58,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:33:58,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:33:58,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:33:58,967 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 15:33:58,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:33:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash 408891724, now seen corresponding path program 1 times [2024-06-04 15:33:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:33:58,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138630736] [2024-06-04 15:33:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:33:58,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:33:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:33:59,964 INFO 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 15:33:59,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:33:59,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138630736] [2024-06-04 15:33:59,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138630736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:33:59,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:33:59,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:33:59,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576602000] [2024-06-04 15:33:59,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:33:59,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:33:59,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:33:59,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:33:59,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:00,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:00,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 162 transitions, 1620 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 15:34:00,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:00,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:00,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:00,648 INFO L124 PetriNetUnfolderBase]: 2050/3089 cut-off events. [2024-06-04 15:34:00,648 INFO L125 PetriNetUnfolderBase]: For 65509/65525 co-relation queries the response was YES. [2024-06-04 15:34:00,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18614 conditions, 3089 events. 2050/3089 cut-off events. For 65509/65525 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14408 event pairs, 490 based on Foata normal form. 11/3094 useless extension candidates. Maximal degree in co-relation 18551. Up to 2562 conditions per place. [2024-06-04 15:34:00,669 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 115 selfloop transitions, 70 changer transitions 0/188 dead transitions. [2024-06-04 15:34:00,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 188 transitions, 2102 flow [2024-06-04 15:34:00,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:34:00,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-04 15:34:00,671 INFO L175 Difference]: Start difference. First operand has 131 places, 162 transitions, 1620 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:34:00,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 188 transitions, 2102 flow [2024-06-04 15:34:00,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 188 transitions, 1951 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:00,733 INFO L231 Difference]: Finished difference. Result has 135 places, 162 transitions, 1617 flow [2024-06-04 15:34:00,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1617, PETRI_PLACES=135, PETRI_TRANSITIONS=162} [2024-06-04 15:34:00,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-04 15:34:00,735 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 162 transitions, 1617 flow [2024-06-04 15:34:00,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 15:34:00,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:00,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:00,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:34:00,735 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:00,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash 339890280, now seen corresponding path program 2 times [2024-06-04 15:34:00,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:00,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940443605] [2024-06-04 15:34:00,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:00,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:01,738 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 15:34:01,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:01,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940443605] [2024-06-04 15:34:01,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940443605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:01,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:01,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:01,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493357456] [2024-06-04 15:34:01,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:01,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:01,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:01,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:01,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:01,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 162 transitions, 1617 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 15:34:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:01,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:02,288 INFO L124 PetriNetUnfolderBase]: 2067/3115 cut-off events. [2024-06-04 15:34:02,288 INFO L125 PetriNetUnfolderBase]: For 70485/70501 co-relation queries the response was YES. [2024-06-04 15:34:02,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18961 conditions, 3115 events. 2067/3115 cut-off events. For 70485/70501 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14632 event pairs, 445 based on Foata normal form. 16/3127 useless extension candidates. Maximal degree in co-relation 18897. Up to 2863 conditions per place. [2024-06-04 15:34:02,311 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 39 changer transitions 0/194 dead transitions. [2024-06-04 15:34:02,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 194 transitions, 2285 flow [2024-06-04 15:34:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:34:02,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-04 15:34:02,312 INFO L175 Difference]: Start difference. First operand has 135 places, 162 transitions, 1617 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:34:02,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 194 transitions, 2285 flow [2024-06-04 15:34:02,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 194 transitions, 2125 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:02,377 INFO L231 Difference]: Finished difference. Result has 137 places, 167 transitions, 1648 flow [2024-06-04 15:34:02,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1648, PETRI_PLACES=137, PETRI_TRANSITIONS=167} [2024-06-04 15:34:02,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-04 15:34:02,378 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 167 transitions, 1648 flow [2024-06-04 15:34:02,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 15:34:02,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:02,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:02,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:34:02,379 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:02,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:02,379 INFO L85 PathProgramCache]: Analyzing trace with hash 408898482, now seen corresponding path program 3 times [2024-06-04 15:34:02,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:02,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817854551] [2024-06-04 15:34:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:02,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:03,267 INFO 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 15:34:03,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:03,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817854551] [2024-06-04 15:34:03,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817854551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:03,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:03,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:03,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408397884] [2024-06-04 15:34:03,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:03,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:03,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:03,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:03,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:03,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 167 transitions, 1648 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 15:34:03,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:03,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:03,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:03,891 INFO L124 PetriNetUnfolderBase]: 2059/3103 cut-off events. [2024-06-04 15:34:03,891 INFO L125 PetriNetUnfolderBase]: For 74984/75000 co-relation queries the response was YES. [2024-06-04 15:34:03,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19037 conditions, 3103 events. 2059/3103 cut-off events. For 74984/75000 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14522 event pairs, 492 based on Foata normal form. 16/3115 useless extension candidates. Maximal degree in co-relation 18971. Up to 2961 conditions per place. [2024-06-04 15:34:03,909 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 29 changer transitions 0/191 dead transitions. [2024-06-04 15:34:03,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 191 transitions, 2120 flow [2024-06-04 15:34:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:34:03,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:34:03,910 INFO L175 Difference]: Start difference. First operand has 137 places, 167 transitions, 1648 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:34:03,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 191 transitions, 2120 flow [2024-06-04 15:34:03,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 191 transitions, 2010 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:03,982 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1603 flow [2024-06-04 15:34:03,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1603, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-04 15:34:03,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-04 15:34:03,983 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1603 flow [2024-06-04 15:34:03,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 15:34:03,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:03,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:03,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:34:03,983 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 15:34:03,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:03,984 INFO L85 PathProgramCache]: Analyzing trace with hash 209633856, now seen corresponding path program 2 times [2024-06-04 15:34:03,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:03,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776729230] [2024-06-04 15:34:03,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:03,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:04,594 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 15:34:04,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776729230] [2024-06-04 15:34:04,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776729230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:04,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:04,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:34:04,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052105695] [2024-06-04 15:34:04,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:04,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:34:04,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:34:04,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:34:04,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:04,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1603 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:04,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:04,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:04,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:05,195 INFO L124 PetriNetUnfolderBase]: 2066/3111 cut-off events. [2024-06-04 15:34:05,195 INFO L125 PetriNetUnfolderBase]: For 78552/78552 co-relation queries the response was YES. [2024-06-04 15:34:05,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19147 conditions, 3111 events. 2066/3111 cut-off events. For 78552/78552 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14624 event pairs, 490 based on Foata normal form. 3/3112 useless extension candidates. Maximal degree in co-relation 19079. Up to 3051 conditions per place. [2024-06-04 15:34:05,214 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-06-04 15:34:05,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 184 transitions, 2057 flow [2024-06-04 15:34:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:34:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:34:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-04 15:34:05,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:34:05,215 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1603 flow. Second operand 5 states and 90 transitions. [2024-06-04 15:34:05,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 184 transitions, 2057 flow [2024-06-04 15:34:05,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 184 transitions, 1960 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:05,285 INFO L231 Difference]: Finished difference. Result has 139 places, 170 transitions, 1612 flow [2024-06-04 15:34:05,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1612, PETRI_PLACES=139, PETRI_TRANSITIONS=170} [2024-06-04 15:34:05,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-04 15:34:05,286 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 170 transitions, 1612 flow [2024-06-04 15:34:05,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:05,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:05,286 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 15:34:05,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:34:05,286 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 15:34:05,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:05,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1313655978, now seen corresponding path program 1 times [2024-06-04 15:34:05,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:05,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926981331] [2024-06-04 15:34:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:05,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:06,208 INFO 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 15:34:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:06,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926981331] [2024-06-04 15:34:06,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926981331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:06,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:06,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:06,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112937541] [2024-06-04 15:34:06,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:06,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:06,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:06,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 170 transitions, 1612 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:06,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:06,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:06,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:06,860 INFO L124 PetriNetUnfolderBase]: 2083/3141 cut-off events. [2024-06-04 15:34:06,860 INFO L125 PetriNetUnfolderBase]: For 84386/84405 co-relation queries the response was YES. [2024-06-04 15:34:06,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19636 conditions, 3141 events. 2083/3141 cut-off events. For 84386/84405 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14789 event pairs, 329 based on Foata normal form. 18/3155 useless extension candidates. Maximal degree in co-relation 19567. Up to 2964 conditions per place. [2024-06-04 15:34:06,885 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 26 changer transitions 0/200 dead transitions. [2024-06-04 15:34:06,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 200 transitions, 2146 flow [2024-06-04 15:34:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:34:06,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-04 15:34:06,886 INFO L175 Difference]: Start difference. First operand has 139 places, 170 transitions, 1612 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:34:06,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 200 transitions, 2146 flow [2024-06-04 15:34:06,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 200 transitions, 2098 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:06,961 INFO L231 Difference]: Finished difference. Result has 144 places, 172 transitions, 1661 flow [2024-06-04 15:34:06,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1661, PETRI_PLACES=144, PETRI_TRANSITIONS=172} [2024-06-04 15:34:06,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-04 15:34:06,962 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 172 transitions, 1661 flow [2024-06-04 15:34:06,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:06,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:06,963 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 15:34:06,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:34:06,963 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 15:34:06,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:06,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1121680166, now seen corresponding path program 2 times [2024-06-04 15:34:06,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:06,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166235073] [2024-06-04 15:34:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:08,039 INFO 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 15:34:08,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:08,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166235073] [2024-06-04 15:34:08,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166235073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:08,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:08,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:08,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410991536] [2024-06-04 15:34:08,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:08,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:08,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:08,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:08,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:08,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 172 transitions, 1661 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:08,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:08,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:08,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:08,727 INFO L124 PetriNetUnfolderBase]: 2100/3166 cut-off events. [2024-06-04 15:34:08,727 INFO L125 PetriNetUnfolderBase]: For 90465/90484 co-relation queries the response was YES. [2024-06-04 15:34:08,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20173 conditions, 3166 events. 2100/3166 cut-off events. For 90465/90484 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14962 event pairs, 447 based on Foata normal form. 18/3180 useless extension candidates. Maximal degree in co-relation 20103. Up to 2949 conditions per place. [2024-06-04 15:34:08,752 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 40 changer transitions 0/202 dead transitions. [2024-06-04 15:34:08,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 202 transitions, 2211 flow [2024-06-04 15:34:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:34:08,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-04 15:34:08,754 INFO L175 Difference]: Start difference. First operand has 144 places, 172 transitions, 1661 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:34:08,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 202 transitions, 2211 flow [2024-06-04 15:34:08,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 202 transitions, 2132 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:08,845 INFO L231 Difference]: Finished difference. Result has 146 places, 174 transitions, 1712 flow [2024-06-04 15:34:08,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1712, PETRI_PLACES=146, PETRI_TRANSITIONS=174} [2024-06-04 15:34:08,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-04 15:34:08,846 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 174 transitions, 1712 flow [2024-06-04 15:34:08,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:08,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:08,846 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 15:34:08,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:34:08,846 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 15:34:08,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:08,846 INFO L85 PathProgramCache]: Analyzing trace with hash -549107424, now seen corresponding path program 3 times [2024-06-04 15:34:08,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:08,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520258375] [2024-06-04 15:34:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:08,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:09,800 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 15:34:09,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:09,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520258375] [2024-06-04 15:34:09,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520258375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:09,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:09,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215451225] [2024-06-04 15:34:09,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:09,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:09,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:09,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 174 transitions, 1712 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:09,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:09,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:09,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:10,503 INFO L124 PetriNetUnfolderBase]: 2117/3193 cut-off events. [2024-06-04 15:34:10,503 INFO L125 PetriNetUnfolderBase]: For 97880/97899 co-relation queries the response was YES. [2024-06-04 15:34:10,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20693 conditions, 3193 events. 2117/3193 cut-off events. For 97880/97899 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15099 event pairs, 447 based on Foata normal form. 18/3207 useless extension candidates. Maximal degree in co-relation 20622. Up to 2920 conditions per place. [2024-06-04 15:34:10,526 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 161 selfloop transitions, 40 changer transitions 0/204 dead transitions. [2024-06-04 15:34:10,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 204 transitions, 2266 flow [2024-06-04 15:34:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 15:34:10,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:34:10,528 INFO L175 Difference]: Start difference. First operand has 146 places, 174 transitions, 1712 flow. Second operand 8 states and 132 transitions. [2024-06-04 15:34:10,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 204 transitions, 2266 flow [2024-06-04 15:34:10,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 204 transitions, 2156 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:10,613 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1735 flow [2024-06-04 15:34:10,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1735, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-04 15:34:10,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-04 15:34:10,613 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1735 flow [2024-06-04 15:34:10,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:10,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:10,614 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 15:34:10,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:34:10,614 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:10,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:10,614 INFO L85 PathProgramCache]: Analyzing trace with hash -272460318, now seen corresponding path program 1 times [2024-06-04 15:34:10,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:10,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833631364] [2024-06-04 15:34:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:10,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:11,270 INFO 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 15:34:11,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:11,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833631364] [2024-06-04 15:34:11,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833631364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:11,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:11,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:11,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609502902] [2024-06-04 15:34:11,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:11,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:11,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:11,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:11,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:11,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:11,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1735 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:11,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:11,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:12,088 INFO L124 PetriNetUnfolderBase]: 2127/3207 cut-off events. [2024-06-04 15:34:12,088 INFO L125 PetriNetUnfolderBase]: For 102768/102768 co-relation queries the response was YES. [2024-06-04 15:34:12,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21028 conditions, 3207 events. 2127/3207 cut-off events. For 102768/102768 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15178 event pairs, 450 based on Foata normal form. 2/3207 useless extension candidates. Maximal degree in co-relation 20956. Up to 3080 conditions per place. [2024-06-04 15:34:12,114 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 33 changer transitions 0/205 dead transitions. [2024-06-04 15:34:12,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 205 transitions, 2341 flow [2024-06-04 15:34:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 15:34:12,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-04 15:34:12,115 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1735 flow. Second operand 7 states and 118 transitions. [2024-06-04 15:34:12,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 205 transitions, 2341 flow [2024-06-04 15:34:12,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 205 transitions, 2226 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:12,212 INFO L231 Difference]: Finished difference. Result has 149 places, 182 transitions, 1753 flow [2024-06-04 15:34:12,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1753, PETRI_PLACES=149, PETRI_TRANSITIONS=182} [2024-06-04 15:34:12,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-04 15:34:12,213 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 182 transitions, 1753 flow [2024-06-04 15:34:12,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:12,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:12,213 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 15:34:12,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:34:12,213 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 15:34:12,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1051965330, now seen corresponding path program 1 times [2024-06-04 15:34:12,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:12,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399644303] [2024-06-04 15:34:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:12,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:13,177 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 15:34:13,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:13,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399644303] [2024-06-04 15:34:13,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399644303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:13,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:13,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:13,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775732668] [2024-06-04 15:34:13,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:13,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:13,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:13,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:13,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:13,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:13,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 182 transitions, 1753 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:13,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:13,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:13,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:13,951 INFO L124 PetriNetUnfolderBase]: 2321/3527 cut-off events. [2024-06-04 15:34:13,951 INFO L125 PetriNetUnfolderBase]: For 130352/130371 co-relation queries the response was YES. [2024-06-04 15:34:13,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23829 conditions, 3527 events. 2321/3527 cut-off events. For 130352/130371 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17193 event pairs, 421 based on Foata normal form. 24/3545 useless extension candidates. Maximal degree in co-relation 23756. Up to 2574 conditions per place. [2024-06-04 15:34:13,981 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 77 changer transitions 0/226 dead transitions. [2024-06-04 15:34:13,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 226 transitions, 2573 flow [2024-06-04 15:34:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 15:34:13,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-04 15:34:13,982 INFO L175 Difference]: Start difference. First operand has 149 places, 182 transitions, 1753 flow. Second operand 9 states and 161 transitions. [2024-06-04 15:34:13,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 226 transitions, 2573 flow [2024-06-04 15:34:14,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 226 transitions, 2529 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:14,089 INFO L231 Difference]: Finished difference. Result has 155 places, 184 transitions, 1935 flow [2024-06-04 15:34:14,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1935, PETRI_PLACES=155, PETRI_TRANSITIONS=184} [2024-06-04 15:34:14,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-04 15:34:14,089 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 184 transitions, 1935 flow [2024-06-04 15:34:14,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:14,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:14,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:14,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:34:14,090 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:14,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:14,090 INFO L85 PathProgramCache]: Analyzing trace with hash -401286342, now seen corresponding path program 2 times [2024-06-04 15:34:14,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:14,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183311122] [2024-06-04 15:34:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:14,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:14,853 INFO 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 15:34:14,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:14,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183311122] [2024-06-04 15:34:14,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183311122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:14,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:14,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:14,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415643289] [2024-06-04 15:34:14,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:14,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:14,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:14,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:14,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:14,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:14,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 184 transitions, 1935 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:14,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:14,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:14,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:15,575 INFO L124 PetriNetUnfolderBase]: 2363/3601 cut-off events. [2024-06-04 15:34:15,575 INFO L125 PetriNetUnfolderBase]: For 140920/140939 co-relation queries the response was YES. [2024-06-04 15:34:15,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24707 conditions, 3601 events. 2363/3601 cut-off events. For 140920/140939 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17769 event pairs, 503 based on Foata normal form. 32/3627 useless extension candidates. Maximal degree in co-relation 24632. Up to 2936 conditions per place. [2024-06-04 15:34:15,607 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 136 selfloop transitions, 78 changer transitions 0/217 dead transitions. [2024-06-04 15:34:15,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 217 transitions, 2549 flow [2024-06-04 15:34:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:34:15,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-04 15:34:15,608 INFO L175 Difference]: Start difference. First operand has 155 places, 184 transitions, 1935 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:34:15,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 217 transitions, 2549 flow [2024-06-04 15:34:15,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 217 transitions, 2445 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:15,727 INFO L231 Difference]: Finished difference. Result has 159 places, 186 transitions, 2048 flow [2024-06-04 15:34:15,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2048, PETRI_PLACES=159, PETRI_TRANSITIONS=186} [2024-06-04 15:34:15,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-04 15:34:15,728 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 186 transitions, 2048 flow [2024-06-04 15:34:15,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:15,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:15,728 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 15:34:15,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:34:15,728 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 15:34:15,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:15,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1469518908, now seen corresponding path program 4 times [2024-06-04 15:34:15,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:15,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266710584] [2024-06-04 15:34:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:15,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:16,699 INFO 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 15:34:16,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:16,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266710584] [2024-06-04 15:34:16,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266710584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:16,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:16,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:16,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76601052] [2024-06-04 15:34:16,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:16,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:16,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:16,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:16,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:16,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 186 transitions, 2048 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:16,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:16,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:16,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:17,499 INFO L124 PetriNetUnfolderBase]: 2355/3589 cut-off events. [2024-06-04 15:34:17,500 INFO L125 PetriNetUnfolderBase]: For 136238/136257 co-relation queries the response was YES. [2024-06-04 15:34:17,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24993 conditions, 3589 events. 2355/3589 cut-off events. For 136238/136257 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17730 event pairs, 501 based on Foata normal form. 12/3595 useless extension candidates. Maximal degree in co-relation 24916. Up to 3044 conditions per place. [2024-06-04 15:34:17,530 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 137 selfloop transitions, 75 changer transitions 0/215 dead transitions. [2024-06-04 15:34:17,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 215 transitions, 2638 flow [2024-06-04 15:34:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:17,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 15:34:17,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:34:17,532 INFO L175 Difference]: Start difference. First operand has 159 places, 186 transitions, 2048 flow. Second operand 8 states and 136 transitions. [2024-06-04 15:34:17,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 215 transitions, 2638 flow [2024-06-04 15:34:17,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 215 transitions, 2453 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:17,649 INFO L231 Difference]: Finished difference. Result has 161 places, 188 transitions, 2076 flow [2024-06-04 15:34:17,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2076, PETRI_PLACES=161, PETRI_TRANSITIONS=188} [2024-06-04 15:34:17,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-04 15:34:17,650 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 188 transitions, 2076 flow [2024-06-04 15:34:17,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:17,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:17,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:17,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:34:17,650 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 15:34:17,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1469515188, now seen corresponding path program 5 times [2024-06-04 15:34:17,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:17,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551333456] [2024-06-04 15:34:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:17,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:18,614 INFO 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 15:34:18,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:18,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551333456] [2024-06-04 15:34:18,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551333456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:18,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:18,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:34:18,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586591462] [2024-06-04 15:34:18,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:18,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:34:18,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:18,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:34:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:34:18,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:18,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 188 transitions, 2076 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:18,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:18,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:18,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:19,456 INFO L124 PetriNetUnfolderBase]: 2458/3758 cut-off events. [2024-06-04 15:34:19,456 INFO L125 PetriNetUnfolderBase]: For 152295/152314 co-relation queries the response was YES. [2024-06-04 15:34:19,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26428 conditions, 3758 events. 2458/3758 cut-off events. For 152295/152314 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18854 event pairs, 541 based on Foata normal form. 12/3764 useless extension candidates. Maximal degree in co-relation 26350. Up to 2822 conditions per place. [2024-06-04 15:34:19,483 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 138 selfloop transitions, 83 changer transitions 0/224 dead transitions. [2024-06-04 15:34:19,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 224 transitions, 2872 flow [2024-06-04 15:34:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:34:19,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-04 15:34:19,484 INFO L175 Difference]: Start difference. First operand has 161 places, 188 transitions, 2076 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:34:19,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 224 transitions, 2872 flow [2024-06-04 15:34:19,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 224 transitions, 2679 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 15:34:19,595 INFO L231 Difference]: Finished difference. Result has 163 places, 191 transitions, 2147 flow [2024-06-04 15:34:19,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2147, PETRI_PLACES=163, PETRI_TRANSITIONS=191} [2024-06-04 15:34:19,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-04 15:34:19,596 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 191 transitions, 2147 flow [2024-06-04 15:34:19,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:19,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:19,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:19,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:34:19,596 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:19,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:19,596 INFO L85 PathProgramCache]: Analyzing trace with hash 949392718, now seen corresponding path program 2 times [2024-06-04 15:34:19,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:19,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199266724] [2024-06-04 15:34:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:19,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:20,252 INFO 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 15:34:20,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:20,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199266724] [2024-06-04 15:34:20,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199266724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:20,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:20,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:20,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076663569] [2024-06-04 15:34:20,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:20,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:20,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:20,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:20,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:20,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:20,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 191 transitions, 2147 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:20,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:20,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:20,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:21,142 INFO L124 PetriNetUnfolderBase]: 2468/3768 cut-off events. [2024-06-04 15:34:21,142 INFO L125 PetriNetUnfolderBase]: For 159190/159190 co-relation queries the response was YES. [2024-06-04 15:34:21,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26824 conditions, 3768 events. 2468/3768 cut-off events. For 159190/159190 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18941 event pairs, 561 based on Foata normal form. 2/3768 useless extension candidates. Maximal degree in co-relation 26745. Up to 3639 conditions per place. [2024-06-04 15:34:21,171 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 175 selfloop transitions, 35 changer transitions 0/213 dead transitions. [2024-06-04 15:34:21,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 213 transitions, 2741 flow [2024-06-04 15:34:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 15:34:21,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-04 15:34:21,173 INFO L175 Difference]: Start difference. First operand has 163 places, 191 transitions, 2147 flow. Second operand 7 states and 114 transitions. [2024-06-04 15:34:21,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 213 transitions, 2741 flow [2024-06-04 15:34:21,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 213 transitions, 2598 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:21,295 INFO L231 Difference]: Finished difference. Result has 166 places, 194 transitions, 2108 flow [2024-06-04 15:34:21,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2108, PETRI_PLACES=166, PETRI_TRANSITIONS=194} [2024-06-04 15:34:21,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-04 15:34:21,296 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 194 transitions, 2108 flow [2024-06-04 15:34:21,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:21,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:21,296 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 15:34:21,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:34:21,297 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:21,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:21,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2101461192, now seen corresponding path program 1 times [2024-06-04 15:34:21,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:21,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522830071] [2024-06-04 15:34:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:21,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:22,009 INFO 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 15:34:22,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:22,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522830071] [2024-06-04 15:34:22,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522830071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:22,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:22,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:22,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991387137] [2024-06-04 15:34:22,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:22,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:22,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:22,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:22,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 194 transitions, 2108 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:22,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:22,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:22,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:22,941 INFO L124 PetriNetUnfolderBase]: 2478/3783 cut-off events. [2024-06-04 15:34:22,941 INFO L125 PetriNetUnfolderBase]: For 164415/164415 co-relation queries the response was YES. [2024-06-04 15:34:22,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26930 conditions, 3783 events. 2478/3783 cut-off events. For 164415/164415 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18992 event pairs, 571 based on Foata normal form. 2/3783 useless extension candidates. Maximal degree in co-relation 26849. Up to 3703 conditions per place. [2024-06-04 15:34:22,982 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 184 selfloop transitions, 31 changer transitions 0/218 dead transitions. [2024-06-04 15:34:22,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 218 transitions, 2764 flow [2024-06-04 15:34:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 15:34:22,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-04 15:34:22,983 INFO L175 Difference]: Start difference. First operand has 166 places, 194 transitions, 2108 flow. Second operand 7 states and 114 transitions. [2024-06-04 15:34:22,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 218 transitions, 2764 flow [2024-06-04 15:34:23,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 2703 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:23,109 INFO L231 Difference]: Finished difference. Result has 169 places, 200 transitions, 2209 flow [2024-06-04 15:34:23,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2209, PETRI_PLACES=169, PETRI_TRANSITIONS=200} [2024-06-04 15:34:23,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-04 15:34:23,110 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 200 transitions, 2209 flow [2024-06-04 15:34:23,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:23,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:23,110 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 15:34:23,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:34:23,111 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 15:34:23,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:23,111 INFO L85 PathProgramCache]: Analyzing trace with hash 47445626, now seen corresponding path program 3 times [2024-06-04 15:34:23,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:23,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142173074] [2024-06-04 15:34:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:23,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:23,889 INFO 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 15:34:23,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:23,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142173074] [2024-06-04 15:34:23,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142173074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:23,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:23,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:23,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970419028] [2024-06-04 15:34:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:23,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:23,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:23,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:23,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:23,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 200 transitions, 2209 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:23,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:23,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:23,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:24,652 INFO L124 PetriNetUnfolderBase]: 2442/3730 cut-off events. [2024-06-04 15:34:24,653 INFO L125 PetriNetUnfolderBase]: For 171843/171862 co-relation queries the response was YES. [2024-06-04 15:34:24,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26375 conditions, 3730 events. 2442/3730 cut-off events. For 171843/171862 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18668 event pairs, 527 based on Foata normal form. 28/3752 useless extension candidates. Maximal degree in co-relation 26293. Up to 3047 conditions per place. [2024-06-04 15:34:24,683 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 154 selfloop transitions, 74 changer transitions 0/231 dead transitions. [2024-06-04 15:34:24,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 231 transitions, 2803 flow [2024-06-04 15:34:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:34:24,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:34:24,684 INFO L175 Difference]: Start difference. First operand has 169 places, 200 transitions, 2209 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:34:24,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 231 transitions, 2803 flow [2024-06-04 15:34:24,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 231 transitions, 2730 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:24,850 INFO L231 Difference]: Finished difference. Result has 174 places, 200 transitions, 2295 flow [2024-06-04 15:34:24,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2295, PETRI_PLACES=174, PETRI_TRANSITIONS=200} [2024-06-04 15:34:24,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-04 15:34:24,851 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 200 transitions, 2295 flow [2024-06-04 15:34:24,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:24,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:24,851 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 15:34:24,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:34:24,851 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 15:34:24,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash 966056290, now seen corresponding path program 4 times [2024-06-04 15:34:24,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:24,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357460654] [2024-06-04 15:34:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:25,595 INFO 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 15:34:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357460654] [2024-06-04 15:34:25,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357460654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:25,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:25,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519727919] [2024-06-04 15:34:25,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:25,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:25,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:25,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 200 transitions, 2295 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:25,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:25,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:25,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:26,483 INFO L124 PetriNetUnfolderBase]: 2611/4009 cut-off events. [2024-06-04 15:34:26,483 INFO L125 PetriNetUnfolderBase]: For 194785/194804 co-relation queries the response was YES. [2024-06-04 15:34:26,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29085 conditions, 4009 events. 2611/4009 cut-off events. For 194785/194804 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20587 event pairs, 560 based on Foata normal form. 24/4027 useless extension candidates. Maximal degree in co-relation 29001. Up to 3012 conditions per place. [2024-06-04 15:34:26,518 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 75 changer transitions 0/238 dead transitions. [2024-06-04 15:34:26,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 238 transitions, 3135 flow [2024-06-04 15:34:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:34:26,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-04 15:34:26,519 INFO L175 Difference]: Start difference. First operand has 174 places, 200 transitions, 2295 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:34:26,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 238 transitions, 3135 flow [2024-06-04 15:34:26,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 238 transitions, 2972 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:26,713 INFO L231 Difference]: Finished difference. Result has 175 places, 202 transitions, 2363 flow [2024-06-04 15:34:26,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2363, PETRI_PLACES=175, PETRI_TRANSITIONS=202} [2024-06-04 15:34:26,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 15:34:26,714 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 202 transitions, 2363 flow [2024-06-04 15:34:26,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:26,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:26,714 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 15:34:26,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:34:26,714 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 15:34:26,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:26,715 INFO L85 PathProgramCache]: Analyzing trace with hash 56649836, now seen corresponding path program 5 times [2024-06-04 15:34:26,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:26,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628348488] [2024-06-04 15:34:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:26,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:27,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:27,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628348488] [2024-06-04 15:34:27,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628348488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:27,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:27,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:27,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362701131] [2024-06-04 15:34:27,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:27,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:27,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:27,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:27,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 202 transitions, 2363 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:27,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:27,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:27,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:28,266 INFO L124 PetriNetUnfolderBase]: 2680/4132 cut-off events. [2024-06-04 15:34:28,266 INFO L125 PetriNetUnfolderBase]: For 210587/210606 co-relation queries the response was YES. [2024-06-04 15:34:28,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30164 conditions, 4132 events. 2680/4132 cut-off events. For 210587/210606 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21513 event pairs, 526 based on Foata normal form. 24/4150 useless extension candidates. Maximal degree in co-relation 30079. Up to 2266 conditions per place. [2024-06-04 15:34:28,302 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 154 selfloop transitions, 83 changer transitions 0/240 dead transitions. [2024-06-04 15:34:28,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 240 transitions, 3211 flow [2024-06-04 15:34:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 15:34:28,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-04 15:34:28,305 INFO L175 Difference]: Start difference. First operand has 175 places, 202 transitions, 2363 flow. Second operand 8 states and 143 transitions. [2024-06-04 15:34:28,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 240 transitions, 3211 flow [2024-06-04 15:34:28,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 240 transitions, 3100 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:28,534 INFO L231 Difference]: Finished difference. Result has 179 places, 204 transitions, 2502 flow [2024-06-04 15:34:28,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2502, PETRI_PLACES=179, PETRI_TRANSITIONS=204} [2024-06-04 15:34:28,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-04 15:34:28,535 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 204 transitions, 2502 flow [2024-06-04 15:34:28,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:28,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:28,535 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 15:34:28,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:34:28,536 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:28,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:28,536 INFO L85 PathProgramCache]: Analyzing trace with hash -760241152, now seen corresponding path program 6 times [2024-06-04 15:34:28,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:28,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433014336] [2024-06-04 15:34:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:28,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433014336] [2024-06-04 15:34:29,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433014336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:29,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:29,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:29,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254800614] [2024-06-04 15:34:29,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:29,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:29,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:29,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:29,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:29,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 204 transitions, 2502 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:29,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:29,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:29,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:30,212 INFO L124 PetriNetUnfolderBase]: 2705/4179 cut-off events. [2024-06-04 15:34:30,212 INFO L125 PetriNetUnfolderBase]: For 216934/216953 co-relation queries the response was YES. [2024-06-04 15:34:30,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30561 conditions, 4179 events. 2705/4179 cut-off events. For 216934/216953 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21929 event pairs, 637 based on Foata normal form. 28/4201 useless extension candidates. Maximal degree in co-relation 30474. Up to 3630 conditions per place. [2024-06-04 15:34:30,249 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 170 selfloop transitions, 63 changer transitions 0/236 dead transitions. [2024-06-04 15:34:30,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 236 transitions, 3142 flow [2024-06-04 15:34:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:34:30,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-04 15:34:30,250 INFO L175 Difference]: Start difference. First operand has 179 places, 204 transitions, 2502 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:34:30,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 236 transitions, 3142 flow [2024-06-04 15:34:30,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 236 transitions, 3032 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:30,517 INFO L231 Difference]: Finished difference. Result has 183 places, 205 transitions, 2566 flow [2024-06-04 15:34:30,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2566, PETRI_PLACES=183, PETRI_TRANSITIONS=205} [2024-06-04 15:34:30,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-04 15:34:30,517 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 205 transitions, 2566 flow [2024-06-04 15:34:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:30,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:30,518 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 15:34:30,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:34:30,518 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 15:34:30,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1747198524, now seen corresponding path program 3 times [2024-06-04 15:34:30,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:30,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749147743] [2024-06-04 15:34:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:30,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:31,180 INFO 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 15:34:31,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:31,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749147743] [2024-06-04 15:34:31,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749147743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:31,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:31,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:31,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940472417] [2024-06-04 15:34:31,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:31,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:31,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:31,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:31,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:31,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 205 transitions, 2566 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:31,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:31,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:31,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:32,019 INFO L124 PetriNetUnfolderBase]: 2719/4197 cut-off events. [2024-06-04 15:34:32,019 INFO L125 PetriNetUnfolderBase]: For 211434/211434 co-relation queries the response was YES. [2024-06-04 15:34:32,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30844 conditions, 4197 events. 2719/4197 cut-off events. For 211434/211434 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22097 event pairs, 642 based on Foata normal form. 6/4201 useless extension candidates. Maximal degree in co-relation 30755. Up to 4062 conditions per place. [2024-06-04 15:34:32,058 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 39 changer transitions 0/230 dead transitions. [2024-06-04 15:34:32,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 230 transitions, 3146 flow [2024-06-04 15:34:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:34:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:34:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-04 15:34:32,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-04 15:34:32,059 INFO L175 Difference]: Start difference. First operand has 183 places, 205 transitions, 2566 flow. Second operand 6 states and 111 transitions. [2024-06-04 15:34:32,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 230 transitions, 3146 flow [2024-06-04 15:34:32,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 230 transitions, 2989 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:32,300 INFO L231 Difference]: Finished difference. Result has 182 places, 208 transitions, 2553 flow [2024-06-04 15:34:32,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2553, PETRI_PLACES=182, PETRI_TRANSITIONS=208} [2024-06-04 15:34:32,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-04 15:34:32,300 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 208 transitions, 2553 flow [2024-06-04 15:34:32,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:32,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:32,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:34:32,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:34:32,301 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 15:34:32,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:32,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2043715990, now seen corresponding path program 2 times [2024-06-04 15:34:32,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:32,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671860781] [2024-06-04 15:34:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:32,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:33,069 INFO 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 15:34:33,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:33,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671860781] [2024-06-04 15:34:33,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671860781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:33,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:33,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:33,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787351950] [2024-06-04 15:34:33,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:33,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:33,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:33,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:33,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:33,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:33,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 208 transitions, 2553 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:33,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:33,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:33,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:33,906 INFO L124 PetriNetUnfolderBase]: 2713/4188 cut-off events. [2024-06-04 15:34:33,906 INFO L125 PetriNetUnfolderBase]: For 202890/202890 co-relation queries the response was YES. [2024-06-04 15:34:33,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30664 conditions, 4188 events. 2713/4188 cut-off events. For 202890/202890 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22057 event pairs, 647 based on Foata normal form. 2/4188 useless extension candidates. Maximal degree in co-relation 30575. Up to 4122 conditions per place. [2024-06-04 15:34:33,942 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 195 selfloop transitions, 26 changer transitions 0/224 dead transitions. [2024-06-04 15:34:33,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 224 transitions, 3057 flow [2024-06-04 15:34:33,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:34:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:34:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 15:34:33,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:34:33,943 INFO L175 Difference]: Start difference. First operand has 182 places, 208 transitions, 2553 flow. Second operand 6 states and 102 transitions. [2024-06-04 15:34:33,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 224 transitions, 3057 flow [2024-06-04 15:34:34,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 224 transitions, 2963 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:34,213 INFO L231 Difference]: Finished difference. Result has 184 places, 208 transitions, 2517 flow [2024-06-04 15:34:34,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2517, PETRI_PLACES=184, PETRI_TRANSITIONS=208} [2024-06-04 15:34:34,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-04 15:34:34,214 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 208 transitions, 2517 flow [2024-06-04 15:34:34,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:34,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:34,214 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 15:34:34,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:34:34,214 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 15:34:34,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:34,214 INFO L85 PathProgramCache]: Analyzing trace with hash -846974204, now seen corresponding path program 1 times [2024-06-04 15:34:34,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:34,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748358806] [2024-06-04 15:34:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:34,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:34,892 INFO 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 15:34:34,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:34,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748358806] [2024-06-04 15:34:34,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748358806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:34,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:34,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:34,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276767429] [2024-06-04 15:34:34,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:34,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:34,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:34,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:34,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:34,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:34,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 208 transitions, 2517 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:34,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:34,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:34,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:35,634 INFO L124 PetriNetUnfolderBase]: 2731/4215 cut-off events. [2024-06-04 15:34:35,634 INFO L125 PetriNetUnfolderBase]: For 210806/210825 co-relation queries the response was YES. [2024-06-04 15:34:35,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30970 conditions, 4215 events. 2731/4215 cut-off events. For 210806/210825 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22120 event pairs, 649 based on Foata normal form. 16/4227 useless extension candidates. Maximal degree in co-relation 30880. Up to 4046 conditions per place. [2024-06-04 15:34:35,670 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 197 selfloop transitions, 40 changer transitions 0/240 dead transitions. [2024-06-04 15:34:35,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 240 transitions, 3423 flow [2024-06-04 15:34:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 15:34:35,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-04 15:34:35,672 INFO L175 Difference]: Start difference. First operand has 184 places, 208 transitions, 2517 flow. Second operand 7 states and 116 transitions. [2024-06-04 15:34:35,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 240 transitions, 3423 flow [2024-06-04 15:34:35,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 240 transitions, 3337 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:35,954 INFO L231 Difference]: Finished difference. Result has 187 places, 221 transitions, 2742 flow [2024-06-04 15:34:35,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2742, PETRI_PLACES=187, PETRI_TRANSITIONS=221} [2024-06-04 15:34:35,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-04 15:34:35,954 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 221 transitions, 2742 flow [2024-06-04 15:34:35,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:35,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:35,954 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 15:34:35,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:34:35,955 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 15:34:35,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1843531816, now seen corresponding path program 2 times [2024-06-04 15:34:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:35,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137673387] [2024-06-04 15:34:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:35,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:36,669 INFO 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 15:34:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:36,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137673387] [2024-06-04 15:34:36,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137673387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:36,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:36,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:36,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905412302] [2024-06-04 15:34:36,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:36,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:36,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:36,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:36,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:36,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:36,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 221 transitions, 2742 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:36,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:36,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:36,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:37,554 INFO L124 PetriNetUnfolderBase]: 2830/4351 cut-off events. [2024-06-04 15:34:37,554 INFO L125 PetriNetUnfolderBase]: For 232515/232515 co-relation queries the response was YES. [2024-06-04 15:34:37,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33019 conditions, 4351 events. 2830/4351 cut-off events. For 232515/232515 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22950 event pairs, 648 based on Foata normal form. 6/4355 useless extension candidates. Maximal degree in co-relation 32927. Up to 4240 conditions per place. [2024-06-04 15:34:37,592 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 223 selfloop transitions, 36 changer transitions 0/262 dead transitions. [2024-06-04 15:34:37,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 262 transitions, 3754 flow [2024-06-04 15:34:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:34:37,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:34:37,593 INFO L175 Difference]: Start difference. First operand has 187 places, 221 transitions, 2742 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:34:37,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 262 transitions, 3754 flow [2024-06-04 15:34:37,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 262 transitions, 3634 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-04 15:34:37,886 INFO L231 Difference]: Finished difference. Result has 194 places, 241 transitions, 3073 flow [2024-06-04 15:34:37,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3073, PETRI_PLACES=194, PETRI_TRANSITIONS=241} [2024-06-04 15:34:37,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-04 15:34:37,887 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 241 transitions, 3073 flow [2024-06-04 15:34:37,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:37,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:37,887 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 15:34:37,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:34:37,888 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 15:34:37,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 388453606, now seen corresponding path program 3 times [2024-06-04 15:34:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:37,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842777521] [2024-06-04 15:34:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:37,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:38,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:38,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842777521] [2024-06-04 15:34:38,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842777521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:38,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:38,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:38,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598859736] [2024-06-04 15:34:38,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:38,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:38,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:38,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:38,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:38,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 241 transitions, 3073 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:38,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:38,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:38,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:39,588 INFO L124 PetriNetUnfolderBase]: 2916/4471 cut-off events. [2024-06-04 15:34:39,588 INFO L125 PetriNetUnfolderBase]: For 248319/248319 co-relation queries the response was YES. [2024-06-04 15:34:39,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34882 conditions, 4471 events. 2916/4471 cut-off events. For 248319/248319 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23545 event pairs, 660 based on Foata normal form. 6/4475 useless extension candidates. Maximal degree in co-relation 34787. Up to 4277 conditions per place. [2024-06-04 15:34:39,632 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 56 changer transitions 0/286 dead transitions. [2024-06-04 15:34:39,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 286 transitions, 4159 flow [2024-06-04 15:34:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 15:34:39,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:34:39,634 INFO L175 Difference]: Start difference. First operand has 194 places, 241 transitions, 3073 flow. Second operand 7 states and 126 transitions. [2024-06-04 15:34:39,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 286 transitions, 4159 flow [2024-06-04 15:34:39,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 286 transitions, 3995 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:39,997 INFO L231 Difference]: Finished difference. Result has 200 places, 261 transitions, 3456 flow [2024-06-04 15:34:39,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3456, PETRI_PLACES=200, PETRI_TRANSITIONS=261} [2024-06-04 15:34:39,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-04 15:34:39,998 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 261 transitions, 3456 flow [2024-06-04 15:34:39,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:39,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:39,999 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 15:34:39,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:34:39,999 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 15:34:39,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2044146580, now seen corresponding path program 1 times [2024-06-04 15:34:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:40,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875332682] [2024-06-04 15:34:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:40,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:41,135 INFO 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 15:34:41,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:41,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875332682] [2024-06-04 15:34:41,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875332682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:41,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:41,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:41,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495516981] [2024-06-04 15:34:41,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:41,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:41,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:41,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:41,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:41,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 261 transitions, 3456 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:41,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:41,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:41,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:42,014 INFO L124 PetriNetUnfolderBase]: 2911/4464 cut-off events. [2024-06-04 15:34:42,014 INFO L125 PetriNetUnfolderBase]: For 255603/255603 co-relation queries the response was YES. [2024-06-04 15:34:42,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35595 conditions, 4464 events. 2911/4464 cut-off events. For 255603/255603 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23509 event pairs, 670 based on Foata normal form. 2/4464 useless extension candidates. Maximal degree in co-relation 35496. Up to 4429 conditions per place. [2024-06-04 15:34:42,057 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 256 selfloop transitions, 13 changer transitions 0/272 dead transitions. [2024-06-04 15:34:42,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 272 transitions, 4066 flow [2024-06-04 15:34:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:34:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:34:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-04 15:34:42,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-04 15:34:42,058 INFO L175 Difference]: Start difference. First operand has 200 places, 261 transitions, 3456 flow. Second operand 5 states and 81 transitions. [2024-06-04 15:34:42,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 272 transitions, 4066 flow [2024-06-04 15:34:42,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 272 transitions, 3940 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-04 15:34:42,352 INFO L231 Difference]: Finished difference. Result has 203 places, 263 transitions, 3403 flow [2024-06-04 15:34:42,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3403, PETRI_PLACES=203, PETRI_TRANSITIONS=263} [2024-06-04 15:34:42,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-04 15:34:42,353 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 263 transitions, 3403 flow [2024-06-04 15:34:42,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:42,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:42,354 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 15:34:42,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:34:42,354 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:42,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:42,355 INFO L85 PathProgramCache]: Analyzing trace with hash -299877389, now seen corresponding path program 1 times [2024-06-04 15:34:42,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:42,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738800448] [2024-06-04 15:34:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:42,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:43,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:43,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738800448] [2024-06-04 15:34:43,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738800448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:43,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:43,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:43,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515960686] [2024-06-04 15:34:43,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:43,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:43,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:43,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:43,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:43,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:43,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 263 transitions, 3403 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:43,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:43,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:43,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:44,317 INFO L124 PetriNetUnfolderBase]: 2891/4435 cut-off events. [2024-06-04 15:34:44,317 INFO L125 PetriNetUnfolderBase]: For 262461/262483 co-relation queries the response was YES. [2024-06-04 15:34:44,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35001 conditions, 4435 events. 2891/4435 cut-off events. For 262461/262483 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23183 event pairs, 501 based on Foata normal form. 21/4450 useless extension candidates. Maximal degree in co-relation 34900. Up to 4189 conditions per place. [2024-06-04 15:34:44,360 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 25 changer transitions 0/292 dead transitions. [2024-06-04 15:34:44,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 292 transitions, 4091 flow [2024-06-04 15:34:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:34:44,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:34:44,361 INFO L175 Difference]: Start difference. First operand has 203 places, 263 transitions, 3403 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:34:44,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 292 transitions, 4091 flow [2024-06-04 15:34:44,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 292 transitions, 4034 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:44,699 INFO L231 Difference]: Finished difference. Result has 208 places, 263 transitions, 3402 flow [2024-06-04 15:34:44,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3346, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3402, PETRI_PLACES=208, PETRI_TRANSITIONS=263} [2024-06-04 15:34:44,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-04 15:34:44,700 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 263 transitions, 3402 flow [2024-06-04 15:34:44,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:44,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:44,701 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 15:34:44,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:34:44,701 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 15:34:44,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1433718709, now seen corresponding path program 2 times [2024-06-04 15:34:44,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:44,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594814913] [2024-06-04 15:34:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:44,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:46,114 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 15:34:46,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:46,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594814913] [2024-06-04 15:34:46,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594814913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:46,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:46,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:34:46,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948325025] [2024-06-04 15:34:46,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:46,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:34:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:34:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:34:46,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:46,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 263 transitions, 3402 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:46,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:46,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:46,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:47,149 INFO L124 PetriNetUnfolderBase]: 2932/4504 cut-off events. [2024-06-04 15:34:47,149 INFO L125 PetriNetUnfolderBase]: For 273179/273201 co-relation queries the response was YES. [2024-06-04 15:34:47,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35652 conditions, 4504 events. 2932/4504 cut-off events. For 273179/273201 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23806 event pairs, 633 based on Foata normal form. 28/4528 useless extension candidates. Maximal degree in co-relation 35550. Up to 4218 conditions per place. [2024-06-04 15:34:47,196 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 41 changer transitions 0/299 dead transitions. [2024-06-04 15:34:47,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 299 transitions, 4172 flow [2024-06-04 15:34:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-04 15:34:47,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-04 15:34:47,198 INFO L175 Difference]: Start difference. First operand has 208 places, 263 transitions, 3402 flow. Second operand 9 states and 146 transitions. [2024-06-04 15:34:47,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 299 transitions, 4172 flow [2024-06-04 15:34:47,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 299 transitions, 4040 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:47,524 INFO L231 Difference]: Finished difference. Result has 210 places, 264 transitions, 3398 flow [2024-06-04 15:34:47,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3398, PETRI_PLACES=210, PETRI_TRANSITIONS=264} [2024-06-04 15:34:47,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-04 15:34:47,525 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 264 transitions, 3398 flow [2024-06-04 15:34:47,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:47,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:47,525 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 15:34:47,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:34:47,525 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 15:34:47,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:47,526 INFO L85 PathProgramCache]: Analyzing trace with hash -412460379, now seen corresponding path program 3 times [2024-06-04 15:34:47,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:47,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237715970] [2024-06-04 15:34:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:47,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:34:48,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:48,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237715970] [2024-06-04 15:34:48,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237715970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:48,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:48,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:34:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224304870] [2024-06-04 15:34:48,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:48,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:34:48,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:34:48,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:34:48,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:48,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 264 transitions, 3398 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:48,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:48,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:48,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:49,852 INFO L124 PetriNetUnfolderBase]: 2973/4575 cut-off events. [2024-06-04 15:34:49,852 INFO L125 PetriNetUnfolderBase]: For 287497/287519 co-relation queries the response was YES. [2024-06-04 15:34:49,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35849 conditions, 4575 events. 2973/4575 cut-off events. For 287497/287519 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24316 event pairs, 643 based on Foata normal form. 28/4599 useless extension candidates. Maximal degree in co-relation 35747. Up to 4233 conditions per place. [2024-06-04 15:34:49,901 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 41 changer transitions 0/300 dead transitions. [2024-06-04 15:34:49,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 300 transitions, 4165 flow [2024-06-04 15:34:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 15:34:49,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-04 15:34:49,903 INFO L175 Difference]: Start difference. First operand has 210 places, 264 transitions, 3398 flow. Second operand 9 states and 147 transitions. [2024-06-04 15:34:49,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 300 transitions, 4165 flow [2024-06-04 15:34:50,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 300 transitions, 4055 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:50,334 INFO L231 Difference]: Finished difference. Result has 212 places, 265 transitions, 3415 flow [2024-06-04 15:34:50,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3415, PETRI_PLACES=212, PETRI_TRANSITIONS=265} [2024-06-04 15:34:50,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-04 15:34:50,335 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 265 transitions, 3415 flow [2024-06-04 15:34:50,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:50,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:50,336 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 15:34:50,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:34:50,336 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:50,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash 143665588, now seen corresponding path program 1 times [2024-06-04 15:34:50,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:50,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873959958] [2024-06-04 15:34:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:50,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:51,056 INFO 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 15:34:51,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:51,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873959958] [2024-06-04 15:34:51,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873959958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:51,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:51,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:34:51,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293475685] [2024-06-04 15:34:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:51,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:34:51,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:34:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:34:51,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:51,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 265 transitions, 3415 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:51,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:51,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:51,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:52,123 INFO L124 PetriNetUnfolderBase]: 2993/4603 cut-off events. [2024-06-04 15:34:52,123 INFO L125 PetriNetUnfolderBase]: For 289924/289924 co-relation queries the response was YES. [2024-06-04 15:34:52,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36124 conditions, 4603 events. 2993/4603 cut-off events. For 289924/289924 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24494 event pairs, 667 based on Foata normal form. 4/4605 useless extension candidates. Maximal degree in co-relation 36021. Up to 4381 conditions per place. [2024-06-04 15:34:52,168 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 56 changer transitions 0/299 dead transitions. [2024-06-04 15:34:52,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 299 transitions, 4321 flow [2024-06-04 15:34:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:34:52,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:34:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:34:52,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-04 15:34:52,169 INFO L175 Difference]: Start difference. First operand has 212 places, 265 transitions, 3415 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:34:52,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 299 transitions, 4321 flow [2024-06-04 15:34:52,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 299 transitions, 4209 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 15:34:52,493 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 3527 flow [2024-06-04 15:34:52,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3527, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-04 15:34:52,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-04 15:34:52,493 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 3527 flow [2024-06-04 15:34:52,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:52,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:52,494 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 15:34:52,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:34:52,494 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:52,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:52,494 INFO L85 PathProgramCache]: Analyzing trace with hash -726508483, now seen corresponding path program 1 times [2024-06-04 15:34:52,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:52,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630972420] [2024-06-04 15:34:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:52,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:53,155 INFO 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 15:34:53,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630972420] [2024-06-04 15:34:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630972420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:53,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:53,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:53,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692698328] [2024-06-04 15:34:53,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:53,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:53,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:53,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:53,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 3527 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:53,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:53,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:53,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:54,015 INFO L124 PetriNetUnfolderBase]: 3014/4631 cut-off events. [2024-06-04 15:34:54,015 INFO L125 PetriNetUnfolderBase]: For 298757/298757 co-relation queries the response was YES. [2024-06-04 15:34:54,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36835 conditions, 4631 events. 3014/4631 cut-off events. For 298757/298757 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24644 event pairs, 677 based on Foata normal form. 1/4630 useless extension candidates. Maximal degree in co-relation 36731. Up to 4549 conditions per place. [2024-06-04 15:34:54,063 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 32 changer transitions 0/299 dead transitions. [2024-06-04 15:34:54,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 299 transitions, 4456 flow [2024-06-04 15:34:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 15:34:54,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-04 15:34:54,064 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 3527 flow. Second operand 7 states and 113 transitions. [2024-06-04 15:34:54,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 299 transitions, 4456 flow [2024-06-04 15:34:54,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 299 transitions, 4360 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 15:34:54,430 INFO L231 Difference]: Finished difference. Result has 217 places, 280 transitions, 3695 flow [2024-06-04 15:34:54,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3695, PETRI_PLACES=217, PETRI_TRANSITIONS=280} [2024-06-04 15:34:54,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-04 15:34:54,430 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 280 transitions, 3695 flow [2024-06-04 15:34:54,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:54,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:54,430 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 15:34:54,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:34:54,431 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:54,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:54,431 INFO L85 PathProgramCache]: Analyzing trace with hash 75619665, now seen corresponding path program 2 times [2024-06-04 15:34:54,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:54,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076951948] [2024-06-04 15:34:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:54,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:55,051 INFO 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 15:34:55,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:55,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076951948] [2024-06-04 15:34:55,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076951948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:55,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:55,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:34:55,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573606020] [2024-06-04 15:34:55,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:55,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:34:55,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:55,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:34:55,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:34:55,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:55,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 280 transitions, 3695 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:55,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:55,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:55,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:56,042 INFO L124 PetriNetUnfolderBase]: 3011/4627 cut-off events. [2024-06-04 15:34:56,042 INFO L125 PetriNetUnfolderBase]: For 307215/307215 co-relation queries the response was YES. [2024-06-04 15:34:56,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36940 conditions, 4627 events. 3011/4627 cut-off events. For 307215/307215 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24653 event pairs, 675 based on Foata normal form. 1/4626 useless extension candidates. Maximal degree in co-relation 36833. Up to 4573 conditions per place. [2024-06-04 15:34:56,087 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 270 selfloop transitions, 22 changer transitions 0/295 dead transitions. [2024-06-04 15:34:56,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 295 transitions, 4335 flow [2024-06-04 15:34:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:34:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:34:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-04 15:34:56,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-04 15:34:56,088 INFO L175 Difference]: Start difference. First operand has 217 places, 280 transitions, 3695 flow. Second operand 7 states and 108 transitions. [2024-06-04 15:34:56,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 295 transitions, 4335 flow [2024-06-04 15:34:56,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 295 transitions, 4265 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 15:34:56,491 INFO L231 Difference]: Finished difference. Result has 221 places, 280 transitions, 3675 flow [2024-06-04 15:34:56,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3675, PETRI_PLACES=221, PETRI_TRANSITIONS=280} [2024-06-04 15:34:56,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-04 15:34:56,492 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 280 transitions, 3675 flow [2024-06-04 15:34:56,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:56,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:56,492 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 15:34:56,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:34:56,492 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:56,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash -197309381, now seen corresponding path program 4 times [2024-06-04 15:34:56,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:56,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974707314] [2024-06-04 15:34:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:56,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:34:57,823 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 15:34:57,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:34:57,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974707314] [2024-06-04 15:34:57,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974707314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:34:57,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:34:57,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:34:57,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15475959] [2024-06-04 15:34:57,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:34:57,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:34:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:34:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:34:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:34:57,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:34:57,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 280 transitions, 3675 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:57,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:34:57,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:34:57,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:34:59,131 INFO L124 PetriNetUnfolderBase]: 3052/4701 cut-off events. [2024-06-04 15:34:59,131 INFO L125 PetriNetUnfolderBase]: For 331405/331425 co-relation queries the response was YES. [2024-06-04 15:34:59,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37562 conditions, 4701 events. 3052/4701 cut-off events. For 331405/331425 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25155 event pairs, 660 based on Foata normal form. 19/4714 useless extension candidates. Maximal degree in co-relation 37453. Up to 4235 conditions per place. [2024-06-04 15:34:59,182 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 253 selfloop transitions, 59 changer transitions 0/315 dead transitions. [2024-06-04 15:34:59,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 315 transitions, 4478 flow [2024-06-04 15:34:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:34:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:34:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 15:34:59,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-04 15:34:59,184 INFO L175 Difference]: Start difference. First operand has 221 places, 280 transitions, 3675 flow. Second operand 9 states and 149 transitions. [2024-06-04 15:34:59,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 315 transitions, 4478 flow [2024-06-04 15:34:59,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 315 transitions, 4406 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 15:34:59,679 INFO L231 Difference]: Finished difference. Result has 225 places, 281 transitions, 3768 flow [2024-06-04 15:34:59,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3603, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3768, PETRI_PLACES=225, PETRI_TRANSITIONS=281} [2024-06-04 15:34:59,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-04 15:34:59,680 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 281 transitions, 3768 flow [2024-06-04 15:34:59,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:34:59,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:34:59,680 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 15:34:59,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:34:59,680 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:34:59,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:34:59,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1689667709, now seen corresponding path program 5 times [2024-06-04 15:34:59,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:34:59,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049332311] [2024-06-04 15:34:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:34:59,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:34:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:00,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:00,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049332311] [2024-06-04 15:35:00,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049332311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:00,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:00,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037059823] [2024-06-04 15:35:00,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:00,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:00,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:00,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:00,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:00,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:00,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 281 transitions, 3768 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:00,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:00,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:00,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:01,817 INFO L124 PetriNetUnfolderBase]: 3032/4669 cut-off events. [2024-06-04 15:35:01,818 INFO L125 PetriNetUnfolderBase]: For 331351/331371 co-relation queries the response was YES. [2024-06-04 15:35:01,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37284 conditions, 4669 events. 3032/4669 cut-off events. For 331351/331371 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24984 event pairs, 606 based on Foata normal form. 19/4682 useless extension candidates. Maximal degree in co-relation 37174. Up to 3950 conditions per place. [2024-06-04 15:35:01,864 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 239 selfloop transitions, 69 changer transitions 0/311 dead transitions. [2024-06-04 15:35:01,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 311 transitions, 4512 flow [2024-06-04 15:35:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 15:35:01,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-04 15:35:01,866 INFO L175 Difference]: Start difference. First operand has 225 places, 281 transitions, 3768 flow. Second operand 8 states and 133 transitions. [2024-06-04 15:35:01,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 311 transitions, 4512 flow [2024-06-04 15:35:02,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 311 transitions, 4378 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:02,280 INFO L231 Difference]: Finished difference. Result has 228 places, 282 transitions, 3819 flow [2024-06-04 15:35:02,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3819, PETRI_PLACES=228, PETRI_TRANSITIONS=282} [2024-06-04 15:35:02,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-04 15:35:02,282 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 282 transitions, 3819 flow [2024-06-04 15:35:02,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:02,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:02,282 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 15:35:02,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:35:02,282 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:02,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:02,282 INFO L85 PathProgramCache]: Analyzing trace with hash 438586383, now seen corresponding path program 6 times [2024-06-04 15:35:02,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:02,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918473923] [2024-06-04 15:35:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:03,492 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 15:35:03,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:03,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918473923] [2024-06-04 15:35:03,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918473923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:03,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:03,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:35:03,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679920797] [2024-06-04 15:35:03,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:03,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:35:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:03,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:35:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:35:03,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:03,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 282 transitions, 3819 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:03,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:03,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:03,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:04,590 INFO L124 PetriNetUnfolderBase]: 3012/4637 cut-off events. [2024-06-04 15:35:04,590 INFO L125 PetriNetUnfolderBase]: For 327077/327097 co-relation queries the response was YES. [2024-06-04 15:35:04,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36805 conditions, 4637 events. 3012/4637 cut-off events. For 327077/327097 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24684 event pairs, 612 based on Foata normal form. 19/4650 useless extension candidates. Maximal degree in co-relation 36693. Up to 3903 conditions per place. [2024-06-04 15:35:04,635 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 237 selfloop transitions, 80 changer transitions 0/320 dead transitions. [2024-06-04 15:35:04,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 320 transitions, 4621 flow [2024-06-04 15:35:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:35:04,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-04 15:35:04,637 INFO L175 Difference]: Start difference. First operand has 228 places, 282 transitions, 3819 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:35:04,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 320 transitions, 4621 flow [2024-06-04 15:35:05,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 320 transitions, 4303 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-04 15:35:05,190 INFO L231 Difference]: Finished difference. Result has 229 places, 282 transitions, 3667 flow [2024-06-04 15:35:05,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3667, PETRI_PLACES=229, PETRI_TRANSITIONS=282} [2024-06-04 15:35:05,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-04 15:35:05,191 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 282 transitions, 3667 flow [2024-06-04 15:35:05,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:05,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:05,191 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 15:35:05,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:35:05,191 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:05,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:05,192 INFO L85 PathProgramCache]: Analyzing trace with hash 152931178, now seen corresponding path program 2 times [2024-06-04 15:35:05,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:05,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766469438] [2024-06-04 15:35:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:05,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:05,957 INFO 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 15:35:05,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:05,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766469438] [2024-06-04 15:35:05,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766469438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:05,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:05,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:05,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628320531] [2024-06-04 15:35:05,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:05,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:05,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:05,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:05,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:06,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:06,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 282 transitions, 3667 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:06,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:06,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:06,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:07,186 INFO L124 PetriNetUnfolderBase]: 3064/4705 cut-off events. [2024-06-04 15:35:07,186 INFO L125 PetriNetUnfolderBase]: For 320974/320974 co-relation queries the response was YES. [2024-06-04 15:35:07,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36614 conditions, 4705 events. 3064/4705 cut-off events. For 320974/320974 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25064 event pairs, 657 based on Foata normal form. 4/4707 useless extension candidates. Maximal degree in co-relation 36503. Up to 4453 conditions per place. [2024-06-04 15:35:07,229 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 251 selfloop transitions, 59 changer transitions 0/313 dead transitions. [2024-06-04 15:35:07,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 4699 flow [2024-06-04 15:35:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:35:07,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-04 15:35:07,231 INFO L175 Difference]: Start difference. First operand has 229 places, 282 transitions, 3667 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:35:07,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 4699 flow [2024-06-04 15:35:07,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 313 transitions, 4503 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 15:35:07,708 INFO L231 Difference]: Finished difference. Result has 229 places, 288 transitions, 3687 flow [2024-06-04 15:35:07,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3687, PETRI_PLACES=229, PETRI_TRANSITIONS=288} [2024-06-04 15:35:07,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-04 15:35:07,708 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 288 transitions, 3687 flow [2024-06-04 15:35:07,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:07,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:07,709 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 15:35:07,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:35:07,709 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 15:35:07,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:07,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1902242030, now seen corresponding path program 3 times [2024-06-04 15:35:07,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:07,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46532940] [2024-06-04 15:35:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:07,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:08,455 INFO 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 15:35:08,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:08,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46532940] [2024-06-04 15:35:08,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46532940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:08,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:08,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:08,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482993172] [2024-06-04 15:35:08,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:08,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:08,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:08,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:08,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:08,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:08,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 288 transitions, 3687 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:08,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:08,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:08,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:09,573 INFO L124 PetriNetUnfolderBase]: 3052/4689 cut-off events. [2024-06-04 15:35:09,574 INFO L125 PetriNetUnfolderBase]: For 324336/324336 co-relation queries the response was YES. [2024-06-04 15:35:09,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36151 conditions, 4689 events. 3052/4689 cut-off events. For 324336/324336 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24989 event pairs, 657 based on Foata normal form. 4/4691 useless extension candidates. Maximal degree in co-relation 36039. Up to 4445 conditions per place. [2024-06-04 15:35:09,625 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 58 changer transitions 0/313 dead transitions. [2024-06-04 15:35:09,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 4525 flow [2024-06-04 15:35:09,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:35:09,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-04 15:35:09,626 INFO L175 Difference]: Start difference. First operand has 229 places, 288 transitions, 3687 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:35:09,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 4525 flow [2024-06-04 15:35:10,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 313 transitions, 4387 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:10,006 INFO L231 Difference]: Finished difference. Result has 233 places, 288 transitions, 3671 flow [2024-06-04 15:35:10,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3549, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3671, PETRI_PLACES=233, PETRI_TRANSITIONS=288} [2024-06-04 15:35:10,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-04 15:35:10,007 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 288 transitions, 3671 flow [2024-06-04 15:35:10,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:10,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:10,008 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 15:35:10,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:35:10,008 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 15:35:10,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:10,009 INFO L85 PathProgramCache]: Analyzing trace with hash -494112555, now seen corresponding path program 3 times [2024-06-04 15:35:10,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:10,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207723743] [2024-06-04 15:35:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:10,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:10,697 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 15:35:10,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:10,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207723743] [2024-06-04 15:35:10,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207723743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:10,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:10,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:10,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638607659] [2024-06-04 15:35:10,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:10,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:10,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:10,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:10,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:10,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:10,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 288 transitions, 3671 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:10,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:10,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:10,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:11,572 INFO L124 PetriNetUnfolderBase]: 3054/4695 cut-off events. [2024-06-04 15:35:11,573 INFO L125 PetriNetUnfolderBase]: For 330885/330907 co-relation queries the response was YES. [2024-06-04 15:35:11,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36165 conditions, 4695 events. 3054/4695 cut-off events. For 330885/330907 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25064 event pairs, 677 based on Foata normal form. 18/4709 useless extension candidates. Maximal degree in co-relation 36052. Up to 4494 conditions per place. [2024-06-04 15:35:11,621 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 65 changer transitions 0/313 dead transitions. [2024-06-04 15:35:11,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 313 transitions, 4682 flow [2024-06-04 15:35:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 15:35:11,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-04 15:35:11,623 INFO L175 Difference]: Start difference. First operand has 233 places, 288 transitions, 3671 flow. Second operand 7 states and 116 transitions. [2024-06-04 15:35:11,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 313 transitions, 4682 flow [2024-06-04 15:35:12,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 313 transitions, 4558 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 15:35:12,149 INFO L231 Difference]: Finished difference. Result has 234 places, 295 transitions, 3828 flow [2024-06-04 15:35:12,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3828, PETRI_PLACES=234, PETRI_TRANSITIONS=295} [2024-06-04 15:35:12,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-04 15:35:12,149 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 295 transitions, 3828 flow [2024-06-04 15:35:12,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:12,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:12,150 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 15:35:12,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:35:12,150 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 15:35:12,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:12,151 INFO L85 PathProgramCache]: Analyzing trace with hash -493784265, now seen corresponding path program 4 times [2024-06-04 15:35:12,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:12,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411338173] [2024-06-04 15:35:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:12,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:12,947 INFO 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 15:35:12,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:12,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411338173] [2024-06-04 15:35:12,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411338173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:12,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:12,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:12,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463507751] [2024-06-04 15:35:12,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:12,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:12,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:12,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:13,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:13,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 295 transitions, 3828 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:13,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:13,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:13,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:13,900 INFO L124 PetriNetUnfolderBase]: 3030/4660 cut-off events. [2024-06-04 15:35:13,900 INFO L125 PetriNetUnfolderBase]: For 337360/337360 co-relation queries the response was YES. [2024-06-04 15:35:13,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35915 conditions, 4660 events. 3030/4660 cut-off events. For 337360/337360 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24884 event pairs, 661 based on Foata normal form. 6/4664 useless extension candidates. Maximal degree in co-relation 35800. Up to 4557 conditions per place. [2024-06-04 15:35:13,955 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 270 selfloop transitions, 40 changer transitions 0/313 dead transitions. [2024-06-04 15:35:13,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 313 transitions, 4524 flow [2024-06-04 15:35:13,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 15:35:13,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-04 15:35:13,956 INFO L175 Difference]: Start difference. First operand has 234 places, 295 transitions, 3828 flow. Second operand 8 states and 127 transitions. [2024-06-04 15:35:13,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 313 transitions, 4524 flow [2024-06-04 15:35:14,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 313 transitions, 4304 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:14,511 INFO L231 Difference]: Finished difference. Result has 239 places, 295 transitions, 3702 flow [2024-06-04 15:35:14,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3702, PETRI_PLACES=239, PETRI_TRANSITIONS=295} [2024-06-04 15:35:14,512 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-04 15:35:14,512 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 295 transitions, 3702 flow [2024-06-04 15:35:14,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:14,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:14,513 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 15:35:14,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:35:14,513 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 15:35:14,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:14,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1069320801, now seen corresponding path program 5 times [2024-06-04 15:35:14,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:14,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065806837] [2024-06-04 15:35:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:14,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:15,249 INFO 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 15:35:15,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065806837] [2024-06-04 15:35:15,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065806837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:15,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:15,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:15,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665542600] [2024-06-04 15:35:15,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:15,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:15,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:15,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:15,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:15,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:15,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 295 transitions, 3702 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:15,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:15,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:15,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:16,246 INFO L124 PetriNetUnfolderBase]: 3037/4670 cut-off events. [2024-06-04 15:35:16,246 INFO L125 PetriNetUnfolderBase]: For 340435/340435 co-relation queries the response was YES. [2024-06-04 15:35:16,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35852 conditions, 4670 events. 3037/4670 cut-off events. For 340435/340435 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24950 event pairs, 668 based on Foata normal form. 3/4671 useless extension candidates. Maximal degree in co-relation 35736. Up to 4591 conditions per place. [2024-06-04 15:35:16,293 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 33 changer transitions 0/316 dead transitions. [2024-06-04 15:35:16,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 316 transitions, 4462 flow [2024-06-04 15:35:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:35:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:35:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 15:35:16,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-04 15:35:16,295 INFO L175 Difference]: Start difference. First operand has 239 places, 295 transitions, 3702 flow. Second operand 6 states and 105 transitions. [2024-06-04 15:35:16,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 316 transitions, 4462 flow [2024-06-04 15:35:16,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 316 transitions, 4362 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 15:35:16,832 INFO L231 Difference]: Finished difference. Result has 238 places, 298 transitions, 3752 flow [2024-06-04 15:35:16,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3752, PETRI_PLACES=238, PETRI_TRANSITIONS=298} [2024-06-04 15:35:16,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-04 15:35:16,833 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 298 transitions, 3752 flow [2024-06-04 15:35:16,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:16,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:16,833 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 15:35:16,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:35:16,834 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 15:35:16,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:16,834 INFO L85 PathProgramCache]: Analyzing trace with hash -38498571, now seen corresponding path program 6 times [2024-06-04 15:35:16,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:16,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333895178] [2024-06-04 15:35:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:16,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:17,506 INFO 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 15:35:17,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:17,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333895178] [2024-06-04 15:35:17,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333895178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:17,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:17,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:17,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091128682] [2024-06-04 15:35:17,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:17,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:17,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:17,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:17,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:17,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:17,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 298 transitions, 3752 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:17,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:17,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:17,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:18,455 INFO L124 PetriNetUnfolderBase]: 3013/4637 cut-off events. [2024-06-04 15:35:18,455 INFO L125 PetriNetUnfolderBase]: For 346011/346011 co-relation queries the response was YES. [2024-06-04 15:35:18,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35407 conditions, 4637 events. 3013/4637 cut-off events. For 346011/346011 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24755 event pairs, 665 based on Foata normal form. 6/4641 useless extension candidates. Maximal degree in co-relation 35290. Up to 4444 conditions per place. [2024-06-04 15:35:18,507 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 260 selfloop transitions, 59 changer transitions 0/322 dead transitions. [2024-06-04 15:35:18,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 322 transitions, 4493 flow [2024-06-04 15:35:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 15:35:18,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-04 15:35:18,508 INFO L175 Difference]: Start difference. First operand has 238 places, 298 transitions, 3752 flow. Second operand 7 states and 125 transitions. [2024-06-04 15:35:18,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 322 transitions, 4493 flow [2024-06-04 15:35:19,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 322 transitions, 4339 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:19,166 INFO L231 Difference]: Finished difference. Result has 242 places, 299 transitions, 3781 flow [2024-06-04 15:35:19,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3781, PETRI_PLACES=242, PETRI_TRANSITIONS=299} [2024-06-04 15:35:19,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-04 15:35:19,167 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 299 transitions, 3781 flow [2024-06-04 15:35:19,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:19,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:19,167 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 15:35:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:35:19,167 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:19,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:19,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2102794285, now seen corresponding path program 7 times [2024-06-04 15:35:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:19,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912075369] [2024-06-04 15:35:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:19,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:20,415 INFO 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 15:35:20,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:20,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912075369] [2024-06-04 15:35:20,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912075369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:20,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:20,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:20,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961799001] [2024-06-04 15:35:20,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:20,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:20,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:20,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:20,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:20,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:20,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 299 transitions, 3781 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:20,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:20,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:20,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:21,498 INFO L124 PetriNetUnfolderBase]: 2993/4608 cut-off events. [2024-06-04 15:35:21,498 INFO L125 PetriNetUnfolderBase]: For 346253/346273 co-relation queries the response was YES. [2024-06-04 15:35:21,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34905 conditions, 4608 events. 2993/4608 cut-off events. For 346253/346273 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24546 event pairs, 629 based on Foata normal form. 19/4621 useless extension candidates. Maximal degree in co-relation 34786. Up to 4124 conditions per place. [2024-06-04 15:35:21,550 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 58 changer transitions 0/327 dead transitions. [2024-06-04 15:35:21,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 327 transitions, 4465 flow [2024-06-04 15:35:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:35:21,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-04 15:35:21,552 INFO L175 Difference]: Start difference. First operand has 242 places, 299 transitions, 3781 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:35:21,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 327 transitions, 4465 flow [2024-06-04 15:35:22,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 327 transitions, 4333 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:22,089 INFO L231 Difference]: Finished difference. Result has 243 places, 298 transitions, 3687 flow [2024-06-04 15:35:22,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3687, PETRI_PLACES=243, PETRI_TRANSITIONS=298} [2024-06-04 15:35:22,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-04 15:35:22,089 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 298 transitions, 3687 flow [2024-06-04 15:35:22,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:22,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:22,090 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 15:35:22,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:35:22,090 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 15:35:22,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash -205086924, now seen corresponding path program 4 times [2024-06-04 15:35:22,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:22,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354088477] [2024-06-04 15:35:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:22,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:22,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:22,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354088477] [2024-06-04 15:35:22,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354088477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:22,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:22,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285587759] [2024-06-04 15:35:22,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:22,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:22,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:22,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:22,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:22,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 298 transitions, 3687 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:22,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:22,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:22,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:23,934 INFO L124 PetriNetUnfolderBase]: 3013/4632 cut-off events. [2024-06-04 15:35:23,934 INFO L125 PetriNetUnfolderBase]: For 305861/305861 co-relation queries the response was YES. [2024-06-04 15:35:23,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34333 conditions, 4632 events. 3013/4632 cut-off events. For 305861/305861 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24662 event pairs, 639 based on Foata normal form. 4/4634 useless extension candidates. Maximal degree in co-relation 34215. Up to 4453 conditions per place. [2024-06-04 15:35:23,989 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 275 selfloop transitions, 45 changer transitions 0/323 dead transitions. [2024-06-04 15:35:23,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 323 transitions, 4582 flow [2024-06-04 15:35:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 15:35:23,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:35:23,990 INFO L175 Difference]: Start difference. First operand has 243 places, 298 transitions, 3687 flow. Second operand 7 states and 119 transitions. [2024-06-04 15:35:23,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 323 transitions, 4582 flow [2024-06-04 15:35:24,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 323 transitions, 4372 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 15:35:24,496 INFO L231 Difference]: Finished difference. Result has 242 places, 301 transitions, 3620 flow [2024-06-04 15:35:24,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3477, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3620, PETRI_PLACES=242, PETRI_TRANSITIONS=301} [2024-06-04 15:35:24,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-04 15:35:24,497 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 301 transitions, 3620 flow [2024-06-04 15:35:24,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:24,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:24,497 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 15:35:24,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:35:24,497 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 15:35:24,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:24,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1069324428, now seen corresponding path program 5 times [2024-06-04 15:35:24,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:24,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110275923] [2024-06-04 15:35:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:24,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:25,237 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 15:35:25,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:25,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110275923] [2024-06-04 15:35:25,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110275923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:25,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:25,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:25,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666892937] [2024-06-04 15:35:25,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:25,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:25,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:25,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:25,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:25,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:25,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 301 transitions, 3620 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:25,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:25,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:25,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:26,237 INFO L124 PetriNetUnfolderBase]: 3001/4618 cut-off events. [2024-06-04 15:35:26,237 INFO L125 PetriNetUnfolderBase]: For 307913/307913 co-relation queries the response was YES. [2024-06-04 15:35:26,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33634 conditions, 4618 events. 3001/4618 cut-off events. For 307913/307913 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24609 event pairs, 640 based on Foata normal form. 4/4620 useless extension candidates. Maximal degree in co-relation 33516. Up to 4445 conditions per place. [2024-06-04 15:35:26,290 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 274 selfloop transitions, 49 changer transitions 0/326 dead transitions. [2024-06-04 15:35:26,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 326 transitions, 4372 flow [2024-06-04 15:35:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 15:35:26,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:35:26,291 INFO L175 Difference]: Start difference. First operand has 242 places, 301 transitions, 3620 flow. Second operand 7 states and 123 transitions. [2024-06-04 15:35:26,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 326 transitions, 4372 flow [2024-06-04 15:35:26,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 326 transitions, 4195 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 15:35:26,749 INFO L231 Difference]: Finished difference. Result has 244 places, 301 transitions, 3547 flow [2024-06-04 15:35:26,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3547, PETRI_PLACES=244, PETRI_TRANSITIONS=301} [2024-06-04 15:35:26,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-04 15:35:26,749 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 301 transitions, 3547 flow [2024-06-04 15:35:26,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:26,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:26,750 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 15:35:26,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:35:26,750 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 15:35:26,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:26,750 INFO L85 PathProgramCache]: Analyzing trace with hash -486486059, now seen corresponding path program 1 times [2024-06-04 15:35:26,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:26,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990038142] [2024-06-04 15:35:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:27,701 INFO 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 15:35:27,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990038142] [2024-06-04 15:35:27,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990038142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:27,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:27,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:27,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269554550] [2024-06-04 15:35:27,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:27,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:27,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:27,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:27,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 301 transitions, 3547 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:27,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:27,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:27,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:28,707 INFO L124 PetriNetUnfolderBase]: 3019/4644 cut-off events. [2024-06-04 15:35:28,707 INFO L125 PetriNetUnfolderBase]: For 314867/314889 co-relation queries the response was YES. [2024-06-04 15:35:28,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33865 conditions, 4644 events. 3019/4644 cut-off events. For 314867/314889 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 24748 event pairs, 657 based on Foata normal form. 18/4658 useless extension candidates. Maximal degree in co-relation 33746. Up to 4408 conditions per place. [2024-06-04 15:35:28,758 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 248 selfloop transitions, 82 changer transitions 0/333 dead transitions. [2024-06-04 15:35:28,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 333 transitions, 4765 flow [2024-06-04 15:35:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 15:35:28,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:35:28,759 INFO L175 Difference]: Start difference. First operand has 244 places, 301 transitions, 3547 flow. Second operand 9 states and 144 transitions. [2024-06-04 15:35:28,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 333 transitions, 4765 flow [2024-06-04 15:35:29,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 333 transitions, 4626 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 15:35:29,340 INFO L231 Difference]: Finished difference. Result has 246 places, 309 transitions, 3704 flow [2024-06-04 15:35:29,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3704, PETRI_PLACES=246, PETRI_TRANSITIONS=309} [2024-06-04 15:35:29,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-04 15:35:29,341 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 309 transitions, 3704 flow [2024-06-04 15:35:29,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:29,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:29,342 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 15:35:29,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:35:29,342 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 15:35:29,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:29,343 INFO L85 PathProgramCache]: Analyzing trace with hash -486395694, now seen corresponding path program 1 times [2024-06-04 15:35:29,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:29,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344028850] [2024-06-04 15:35:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:29,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:30,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:30,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344028850] [2024-06-04 15:35:30,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344028850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:30,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:30,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:30,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153507658] [2024-06-04 15:35:30,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:30,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:30,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:30,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:30,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:30,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 309 transitions, 3704 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:30,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:30,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:30,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:31,152 INFO L124 PetriNetUnfolderBase]: 3079/4727 cut-off events. [2024-06-04 15:35:31,152 INFO L125 PetriNetUnfolderBase]: For 339992/340014 co-relation queries the response was YES. [2024-06-04 15:35:31,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35677 conditions, 4727 events. 3079/4727 cut-off events. For 339992/340014 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25213 event pairs, 646 based on Foata normal form. 20/4743 useless extension candidates. Maximal degree in co-relation 35557. Up to 4330 conditions per place. [2024-06-04 15:35:31,195 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 243 selfloop transitions, 102 changer transitions 0/348 dead transitions. [2024-06-04 15:35:31,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 348 transitions, 5030 flow [2024-06-04 15:35:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 15:35:31,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-04 15:35:31,197 INFO L175 Difference]: Start difference. First operand has 246 places, 309 transitions, 3704 flow. Second operand 8 states and 133 transitions. [2024-06-04 15:35:31,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 348 transitions, 5030 flow [2024-06-04 15:35:31,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 348 transitions, 4891 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:31,947 INFO L231 Difference]: Finished difference. Result has 252 places, 326 transitions, 4191 flow [2024-06-04 15:35:31,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4191, PETRI_PLACES=252, PETRI_TRANSITIONS=326} [2024-06-04 15:35:31,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-04 15:35:31,947 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 326 transitions, 4191 flow [2024-06-04 15:35:31,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:31,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:31,948 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 15:35:31,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:35:31,948 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 15:35:31,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash 481037117, now seen corresponding path program 2 times [2024-06-04 15:35:31,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039162501] [2024-06-04 15:35:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:31,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:32,850 INFO 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 15:35:32,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:32,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039162501] [2024-06-04 15:35:32,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039162501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:32,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:32,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:32,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053353672] [2024-06-04 15:35:32,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:32,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:32,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:32,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:32,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 326 transitions, 4191 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:32,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:32,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:32,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:33,988 INFO L124 PetriNetUnfolderBase]: 3295/5025 cut-off events. [2024-06-04 15:35:33,989 INFO L125 PetriNetUnfolderBase]: For 405600/405600 co-relation queries the response was YES. [2024-06-04 15:35:34,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40199 conditions, 5025 events. 3295/5025 cut-off events. For 405600/405600 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26860 event pairs, 643 based on Foata normal form. 12/5035 useless extension candidates. Maximal degree in co-relation 40075. Up to 4737 conditions per place. [2024-06-04 15:35:34,049 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 310 selfloop transitions, 61 changer transitions 0/374 dead transitions. [2024-06-04 15:35:34,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 374 transitions, 5795 flow [2024-06-04 15:35:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 15:35:34,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-04 15:35:34,050 INFO L175 Difference]: Start difference. First operand has 252 places, 326 transitions, 4191 flow. Second operand 9 states and 150 transitions. [2024-06-04 15:35:34,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 374 transitions, 5795 flow [2024-06-04 15:35:34,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 374 transitions, 5628 flow, removed 80 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:34,823 INFO L231 Difference]: Finished difference. Result has 259 places, 348 transitions, 4563 flow [2024-06-04 15:35:34,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4563, PETRI_PLACES=259, PETRI_TRANSITIONS=348} [2024-06-04 15:35:34,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-04 15:35:34,824 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 348 transitions, 4563 flow [2024-06-04 15:35:34,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:34,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:34,824 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 15:35:34,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:35:34,824 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 15:35:34,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:34,825 INFO L85 PathProgramCache]: Analyzing trace with hash -482676624, now seen corresponding path program 2 times [2024-06-04 15:35:34,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:34,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959304684] [2024-06-04 15:35:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:34,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:35,729 INFO 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 15:35:35,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:35,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959304684] [2024-06-04 15:35:35,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959304684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:35,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:35,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:35,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786028751] [2024-06-04 15:35:35,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:35,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:35,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:35,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:35,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:35,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 348 transitions, 4563 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:35,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:35,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:35,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:36,919 INFO L124 PetriNetUnfolderBase]: 3363/5119 cut-off events. [2024-06-04 15:35:36,919 INFO L125 PetriNetUnfolderBase]: For 415079/415079 co-relation queries the response was YES. [2024-06-04 15:35:36,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41737 conditions, 5119 events. 3363/5119 cut-off events. For 415079/415079 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27359 event pairs, 668 based on Foata normal form. 4/5121 useless extension candidates. Maximal degree in co-relation 41610. Up to 4969 conditions per place. [2024-06-04 15:35:36,980 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 327 selfloop transitions, 51 changer transitions 0/381 dead transitions. [2024-06-04 15:35:36,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 5920 flow [2024-06-04 15:35:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:35:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:35:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-04 15:35:36,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-04 15:35:36,981 INFO L175 Difference]: Start difference. First operand has 259 places, 348 transitions, 4563 flow. Second operand 9 states and 141 transitions. [2024-06-04 15:35:36,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 5920 flow [2024-06-04 15:35:37,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 381 transitions, 5752 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:37,717 INFO L231 Difference]: Finished difference. Result has 266 places, 359 transitions, 4791 flow [2024-06-04 15:35:37,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4395, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4791, PETRI_PLACES=266, PETRI_TRANSITIONS=359} [2024-06-04 15:35:37,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-04 15:35:37,718 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 359 transitions, 4791 flow [2024-06-04 15:35:37,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:37,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:37,719 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 15:35:37,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:35:37,719 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 15:35:37,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:37,719 INFO L85 PathProgramCache]: Analyzing trace with hash -38490480, now seen corresponding path program 3 times [2024-06-04 15:35:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:37,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757397080] [2024-06-04 15:35:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:37,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:38,557 INFO 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 15:35:38,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:38,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757397080] [2024-06-04 15:35:38,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757397080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:38,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:38,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:38,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538553872] [2024-06-04 15:35:38,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:38,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:38,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:38,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:38,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:38,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:38,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 359 transitions, 4791 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:38,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:38,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:38,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:39,615 INFO L124 PetriNetUnfolderBase]: 3431/5213 cut-off events. [2024-06-04 15:35:39,615 INFO L125 PetriNetUnfolderBase]: For 439182/439182 co-relation queries the response was YES. [2024-06-04 15:35:39,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43090 conditions, 5213 events. 3431/5213 cut-off events. For 439182/439182 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27859 event pairs, 710 based on Foata normal form. 4/5215 useless extension candidates. Maximal degree in co-relation 42960. Up to 4939 conditions per place. [2024-06-04 15:35:39,680 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 319 selfloop transitions, 76 changer transitions 0/398 dead transitions. [2024-06-04 15:35:39,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 398 transitions, 6233 flow [2024-06-04 15:35:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:35:39,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-04 15:35:39,684 INFO L175 Difference]: Start difference. First operand has 266 places, 359 transitions, 4791 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:35:39,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 398 transitions, 6233 flow [2024-06-04 15:35:40,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 398 transitions, 6095 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:40,469 INFO L231 Difference]: Finished difference. Result has 272 places, 371 transitions, 5177 flow [2024-06-04 15:35:40,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4653, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5177, PETRI_PLACES=272, PETRI_TRANSITIONS=371} [2024-06-04 15:35:40,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-04 15:35:40,470 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 371 transitions, 5177 flow [2024-06-04 15:35:40,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:40,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:40,470 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 15:35:40,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:35:40,471 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 15:35:40,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1063598945, now seen corresponding path program 3 times [2024-06-04 15:35:40,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:40,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054181888] [2024-06-04 15:35:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:41,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:41,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054181888] [2024-06-04 15:35:41,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054181888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:41,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:41,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:41,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534334044] [2024-06-04 15:35:41,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:41,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:41,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:41,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:41,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:41,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:41,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 371 transitions, 5177 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:41,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:41,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:41,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:42,717 INFO L124 PetriNetUnfolderBase]: 3667/5540 cut-off events. [2024-06-04 15:35:42,717 INFO L125 PetriNetUnfolderBase]: For 509313/509313 co-relation queries the response was YES. [2024-06-04 15:35:42,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47336 conditions, 5540 events. 3667/5540 cut-off events. For 509313/509313 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29756 event pairs, 692 based on Foata normal form. 12/5550 useless extension candidates. Maximal degree in co-relation 47202. Up to 4752 conditions per place. [2024-06-04 15:35:42,783 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 296 selfloop transitions, 128 changer transitions 0/427 dead transitions. [2024-06-04 15:35:42,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 427 transitions, 6823 flow [2024-06-04 15:35:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:35:42,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-04 15:35:42,785 INFO L175 Difference]: Start difference. First operand has 272 places, 371 transitions, 5177 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:35:42,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 427 transitions, 6823 flow [2024-06-04 15:35:43,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 427 transitions, 6707 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:43,645 INFO L231 Difference]: Finished difference. Result has 279 places, 390 transitions, 5760 flow [2024-06-04 15:35:43,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5760, PETRI_PLACES=279, PETRI_TRANSITIONS=390} [2024-06-04 15:35:43,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-04 15:35:43,646 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 390 transitions, 5760 flow [2024-06-04 15:35:43,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:43,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:43,646 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 15:35:43,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:35:43,646 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 15:35:43,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:43,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1055974433, now seen corresponding path program 1 times [2024-06-04 15:35:43,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:43,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498229498] [2024-06-04 15:35:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:43,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:44,809 INFO 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 15:35:44,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:44,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498229498] [2024-06-04 15:35:44,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498229498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:44,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:44,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:44,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177984411] [2024-06-04 15:35:44,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:44,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:44,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:44,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:44,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:44,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:44,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 390 transitions, 5760 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:44,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:44,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:44,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:46,061 INFO L124 PetriNetUnfolderBase]: 3664/5537 cut-off events. [2024-06-04 15:35:46,062 INFO L125 PetriNetUnfolderBase]: For 507776/507776 co-relation queries the response was YES. [2024-06-04 15:35:46,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49072 conditions, 5537 events. 3664/5537 cut-off events. For 507776/507776 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29744 event pairs, 737 based on Foata normal form. 1/5536 useless extension candidates. Maximal degree in co-relation 48935. Up to 5472 conditions per place. [2024-06-04 15:35:46,123 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 370 selfloop transitions, 29 changer transitions 0/402 dead transitions. [2024-06-04 15:35:46,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 402 transitions, 6612 flow [2024-06-04 15:35:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:35:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:35:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-04 15:35:46,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-04 15:35:46,124 INFO L175 Difference]: Start difference. First operand has 279 places, 390 transitions, 5760 flow. Second operand 5 states and 86 transitions. [2024-06-04 15:35:46,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 402 transitions, 6612 flow [2024-06-04 15:35:47,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 402 transitions, 6419 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:47,178 INFO L231 Difference]: Finished difference. Result has 281 places, 390 transitions, 5649 flow [2024-06-04 15:35:47,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5649, PETRI_PLACES=281, PETRI_TRANSITIONS=390} [2024-06-04 15:35:47,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-04 15:35:47,178 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 390 transitions, 5649 flow [2024-06-04 15:35:47,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:47,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:47,179 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 15:35:47,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:35:47,179 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 15:35:47,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:47,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1063593210, now seen corresponding path program 4 times [2024-06-04 15:35:47,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:47,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322337994] [2024-06-04 15:35:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:47,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322337994] [2024-06-04 15:35:47,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322337994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:47,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:47,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:47,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170523915] [2024-06-04 15:35:47,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:47,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:47,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:47,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:47,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:47,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 390 transitions, 5649 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:47,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:47,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:47,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:49,213 INFO L124 PetriNetUnfolderBase]: 3704/5593 cut-off events. [2024-06-04 15:35:49,213 INFO L125 PetriNetUnfolderBase]: For 531031/531031 co-relation queries the response was YES. [2024-06-04 15:35:49,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49697 conditions, 5593 events. 3704/5593 cut-off events. For 531031/531031 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30071 event pairs, 735 based on Foata normal form. 4/5595 useless extension candidates. Maximal degree in co-relation 49558. Up to 5461 conditions per place. [2024-06-04 15:35:49,289 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 371 selfloop transitions, 42 changer transitions 0/416 dead transitions. [2024-06-04 15:35:49,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 416 transitions, 6867 flow [2024-06-04 15:35:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 15:35:49,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-04 15:35:49,290 INFO L175 Difference]: Start difference. First operand has 281 places, 390 transitions, 5649 flow. Second operand 8 states and 124 transitions. [2024-06-04 15:35:49,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 416 transitions, 6867 flow [2024-06-04 15:35:50,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 416 transitions, 6809 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:50,461 INFO L231 Difference]: Finished difference. Result has 286 places, 397 transitions, 5889 flow [2024-06-04 15:35:50,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5889, PETRI_PLACES=286, PETRI_TRANSITIONS=397} [2024-06-04 15:35:50,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-04 15:35:50,462 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 397 transitions, 5889 flow [2024-06-04 15:35:50,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:50,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:50,463 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 15:35:50,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 15:35:50,463 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 15:35:50,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash 867430913, now seen corresponding path program 1 times [2024-06-04 15:35:50,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:50,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806120692] [2024-06-04 15:35:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:50,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:51,159 INFO 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 15:35:51,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:51,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806120692] [2024-06-04 15:35:51,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806120692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:51,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:51,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:51,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632879588] [2024-06-04 15:35:51,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:51,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:51,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:51,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 397 transitions, 5889 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:51,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:51,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:51,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:52,451 INFO L124 PetriNetUnfolderBase]: 3746/5650 cut-off events. [2024-06-04 15:35:52,451 INFO L125 PetriNetUnfolderBase]: For 552860/552860 co-relation queries the response was YES. [2024-06-04 15:35:52,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50854 conditions, 5650 events. 3746/5650 cut-off events. For 552860/552860 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30411 event pairs, 757 based on Foata normal form. 2/5650 useless extension candidates. Maximal degree in co-relation 50713. Up to 5456 conditions per place. [2024-06-04 15:35:52,524 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 56 changer transitions 0/440 dead transitions. [2024-06-04 15:35:52,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 440 transitions, 7212 flow [2024-06-04 15:35:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 15:35:52,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-04 15:35:52,526 INFO L175 Difference]: Start difference. First operand has 286 places, 397 transitions, 5889 flow. Second operand 8 states and 133 transitions. [2024-06-04 15:35:52,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 440 transitions, 7212 flow [2024-06-04 15:35:53,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 440 transitions, 6973 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:53,700 INFO L231 Difference]: Finished difference. Result has 290 places, 413 transitions, 6024 flow [2024-06-04 15:35:53,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6024, PETRI_PLACES=290, PETRI_TRANSITIONS=413} [2024-06-04 15:35:53,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-04 15:35:53,701 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 413 transitions, 6024 flow [2024-06-04 15:35:53,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:53,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:53,701 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 15:35:53,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 15:35:53,701 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 15:35:53,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:53,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1156801791, now seen corresponding path program 2 times [2024-06-04 15:35:53,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:53,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971614898] [2024-06-04 15:35:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:53,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:54,385 INFO 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 15:35:54,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:54,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971614898] [2024-06-04 15:35:54,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971614898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:54,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:54,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:54,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015176710] [2024-06-04 15:35:54,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:54,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:54,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:54,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:54,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:54,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:54,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 413 transitions, 6024 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:54,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:54,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:54,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:55,683 INFO L124 PetriNetUnfolderBase]: 3756/5665 cut-off events. [2024-06-04 15:35:55,684 INFO L125 PetriNetUnfolderBase]: For 569970/569970 co-relation queries the response was YES. [2024-06-04 15:35:55,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51487 conditions, 5665 events. 3756/5665 cut-off events. For 569970/569970 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30455 event pairs, 783 based on Foata normal form. 2/5665 useless extension candidates. Maximal degree in co-relation 51346. Up to 5532 conditions per place. [2024-06-04 15:35:55,757 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 47 changer transitions 0/439 dead transitions. [2024-06-04 15:35:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 439 transitions, 7052 flow [2024-06-04 15:35:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 15:35:55,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-04 15:35:55,759 INFO L175 Difference]: Start difference. First operand has 290 places, 413 transitions, 6024 flow. Second operand 8 states and 127 transitions. [2024-06-04 15:35:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 439 transitions, 7052 flow [2024-06-04 15:35:56,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 439 transitions, 6940 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:56,980 INFO L231 Difference]: Finished difference. Result has 296 places, 417 transitions, 6090 flow [2024-06-04 15:35:56,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6090, PETRI_PLACES=296, PETRI_TRANSITIONS=417} [2024-06-04 15:35:56,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-04 15:35:56,981 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 417 transitions, 6090 flow [2024-06-04 15:35:56,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:56,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:56,981 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 15:35:56,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 15:35:56,981 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 15:35:56,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 864570977, now seen corresponding path program 1 times [2024-06-04 15:35:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282777444] [2024-06-04 15:35:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:57,964 INFO 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 15:35:57,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:57,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282777444] [2024-06-04 15:35:57,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282777444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:57,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:57,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:35:57,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90351474] [2024-06-04 15:35:57,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:57,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:35:57,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:57,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:35:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:35:58,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:58,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 417 transitions, 6090 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:35:58,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:58,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:58,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:59,378 INFO L124 PetriNetUnfolderBase]: 3764/5678 cut-off events. [2024-06-04 15:35:59,378 INFO L125 PetriNetUnfolderBase]: For 585391/585391 co-relation queries the response was YES. [2024-06-04 15:35:59,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51467 conditions, 5678 events. 3764/5678 cut-off events. For 585391/585391 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30529 event pairs, 663 based on Foata normal form. 2/5678 useless extension candidates. Maximal degree in co-relation 51324. Up to 5493 conditions per place. [2024-06-04 15:35:59,453 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 401 selfloop transitions, 44 changer transitions 0/448 dead transitions. [2024-06-04 15:35:59,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 448 transitions, 7292 flow [2024-06-04 15:35:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:35:59,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-04 15:35:59,454 INFO L175 Difference]: Start difference. First operand has 296 places, 417 transitions, 6090 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:35:59,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 448 transitions, 7292 flow [2024-06-04 15:36:00,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 448 transitions, 7182 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:00,606 INFO L231 Difference]: Finished difference. Result has 300 places, 421 transitions, 6153 flow [2024-06-04 15:36:00,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5980, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6153, PETRI_PLACES=300, PETRI_TRANSITIONS=421} [2024-06-04 15:36:00,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-04 15:36:00,606 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 421 transitions, 6153 flow [2024-06-04 15:36:00,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:36:00,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:00,607 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 15:36:00,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 15:36:00,607 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 15:36:00,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1165136637, now seen corresponding path program 2 times [2024-06-04 15:36:00,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:00,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451988138] [2024-06-04 15:36:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:00,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:01,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:01,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451988138] [2024-06-04 15:36:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451988138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:01,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:01,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:01,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305221850] [2024-06-04 15:36:01,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:01,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:01,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:01,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:01,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 421 transitions, 6153 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:36:01,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:01,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:01,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:03,090 INFO L124 PetriNetUnfolderBase]: 3772/5690 cut-off events. [2024-06-04 15:36:03,090 INFO L125 PetriNetUnfolderBase]: For 601545/601545 co-relation queries the response was YES. [2024-06-04 15:36:03,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51878 conditions, 5690 events. 3772/5690 cut-off events. For 601545/601545 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 30689 event pairs, 781 based on Foata normal form. 2/5690 useless extension candidates. Maximal degree in co-relation 51733. Up to 5556 conditions per place. [2024-06-04 15:36:03,165 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 398 selfloop transitions, 44 changer transitions 0/445 dead transitions. [2024-06-04 15:36:03,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 445 transitions, 7159 flow [2024-06-04 15:36:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 15:36:03,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-04 15:36:03,166 INFO L175 Difference]: Start difference. First operand has 300 places, 421 transitions, 6153 flow. Second operand 8 states and 127 transitions. [2024-06-04 15:36:03,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 445 transitions, 7159 flow [2024-06-04 15:36:04,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 445 transitions, 7036 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:04,475 INFO L231 Difference]: Finished difference. Result has 304 places, 423 transitions, 6169 flow [2024-06-04 15:36:04,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6169, PETRI_PLACES=304, PETRI_TRANSITIONS=423} [2024-06-04 15:36:04,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-04 15:36:04,476 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 423 transitions, 6169 flow [2024-06-04 15:36:04,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:36:04,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:04,476 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 15:36:04,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 15:36:04,476 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 15:36:04,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:04,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1047224541, now seen corresponding path program 3 times [2024-06-04 15:36:04,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:04,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065773805] [2024-06-04 15:36:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:05,187 INFO 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 15:36:05,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:05,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065773805] [2024-06-04 15:36:05,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065773805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:05,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:05,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:05,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588478103] [2024-06-04 15:36:05,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:05,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:05,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:05,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:05,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:05,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:05,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 423 transitions, 6169 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:05,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:05,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:05,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:06,562 INFO L124 PetriNetUnfolderBase]: 3830/5768 cut-off events. [2024-06-04 15:36:06,562 INFO L125 PetriNetUnfolderBase]: For 632732/632732 co-relation queries the response was YES. [2024-06-04 15:36:06,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53169 conditions, 5768 events. 3830/5768 cut-off events. For 632732/632732 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31093 event pairs, 765 based on Foata normal form. 2/5768 useless extension candidates. Maximal degree in co-relation 53022. Up to 5458 conditions per place. [2024-06-04 15:36:06,630 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 85 changer transitions 0/465 dead transitions. [2024-06-04 15:36:06,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 465 transitions, 7775 flow [2024-06-04 15:36:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:36:06,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-04 15:36:06,631 INFO L175 Difference]: Start difference. First operand has 304 places, 423 transitions, 6169 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:36:06,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 465 transitions, 7775 flow [2024-06-04 15:36:07,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 465 transitions, 7678 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:07,810 INFO L231 Difference]: Finished difference. Result has 306 places, 438 transitions, 6550 flow [2024-06-04 15:36:07,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6072, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6550, PETRI_PLACES=306, PETRI_TRANSITIONS=438} [2024-06-04 15:36:07,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-04 15:36:07,810 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 438 transitions, 6550 flow [2024-06-04 15:36:07,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:07,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:07,811 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 15:36:07,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 15:36:07,811 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 15:36:07,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:07,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1046925825, now seen corresponding path program 1 times [2024-06-04 15:36:07,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:07,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646701726] [2024-06-04 15:36:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:07,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:08,549 INFO 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 15:36:08,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:08,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646701726] [2024-06-04 15:36:08,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646701726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:08,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:08,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:08,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827823279] [2024-06-04 15:36:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:08,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:08,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:08,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:08,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:08,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 438 transitions, 6550 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:08,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:08,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:08,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:10,056 INFO L124 PetriNetUnfolderBase]: 3835/5776 cut-off events. [2024-06-04 15:36:10,056 INFO L125 PetriNetUnfolderBase]: For 649884/649884 co-relation queries the response was YES. [2024-06-04 15:36:10,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54000 conditions, 5776 events. 3835/5776 cut-off events. For 649884/649884 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31177 event pairs, 796 based on Foata normal form. 1/5775 useless extension candidates. Maximal degree in co-relation 53852. Up to 5693 conditions per place. [2024-06-04 15:36:10,125 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 422 selfloop transitions, 35 changer transitions 0/460 dead transitions. [2024-06-04 15:36:10,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 460 transitions, 7606 flow [2024-06-04 15:36:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-04 15:36:10,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-04 15:36:10,126 INFO L175 Difference]: Start difference. First operand has 306 places, 438 transitions, 6550 flow. Second operand 8 states and 122 transitions. [2024-06-04 15:36:10,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 460 transitions, 7606 flow [2024-06-04 15:36:11,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 460 transitions, 7431 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-04 15:36:11,573 INFO L231 Difference]: Finished difference. Result has 311 places, 441 transitions, 6527 flow [2024-06-04 15:36:11,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6527, PETRI_PLACES=311, PETRI_TRANSITIONS=441} [2024-06-04 15:36:11,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-04 15:36:11,574 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 441 transitions, 6527 flow [2024-06-04 15:36:11,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:11,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:11,574 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 15:36:11,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 15:36:11,575 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 15:36:11,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:11,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1046926011, now seen corresponding path program 4 times [2024-06-04 15:36:11,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:11,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888727201] [2024-06-04 15:36:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:11,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:12,290 INFO 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 15:36:12,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:12,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888727201] [2024-06-04 15:36:12,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888727201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:12,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:12,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:12,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593172612] [2024-06-04 15:36:12,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:12,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:12,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:12,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:12,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:12,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:12,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 441 transitions, 6527 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:12,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:12,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:12,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:13,636 INFO L124 PetriNetUnfolderBase]: 3853/5800 cut-off events. [2024-06-04 15:36:13,636 INFO L125 PetriNetUnfolderBase]: For 667978/667978 co-relation queries the response was YES. [2024-06-04 15:36:13,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53980 conditions, 5800 events. 3853/5800 cut-off events. For 667978/667978 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 31284 event pairs, 761 based on Foata normal form. 2/5800 useless extension candidates. Maximal degree in co-relation 53830. Up to 5484 conditions per place. [2024-06-04 15:36:13,721 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 93 changer transitions 0/471 dead transitions. [2024-06-04 15:36:13,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 471 transitions, 7937 flow [2024-06-04 15:36:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:36:13,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-04 15:36:13,722 INFO L175 Difference]: Start difference. First operand has 311 places, 441 transitions, 6527 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:36:13,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 471 transitions, 7937 flow [2024-06-04 15:36:15,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 471 transitions, 7845 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:15,278 INFO L231 Difference]: Finished difference. Result has 314 places, 447 transitions, 6715 flow [2024-06-04 15:36:15,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6715, PETRI_PLACES=314, PETRI_TRANSITIONS=447} [2024-06-04 15:36:15,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-04 15:36:15,279 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 447 transitions, 6715 flow [2024-06-04 15:36:15,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:15,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:15,279 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 15:36:15,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 15:36:15,280 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 15:36:15,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1046925639, now seen corresponding path program 1 times [2024-06-04 15:36:15,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:15,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126127020] [2024-06-04 15:36:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:15,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:16,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:16,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126127020] [2024-06-04 15:36:16,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126127020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:16,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:16,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:16,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805199586] [2024-06-04 15:36:16,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:16,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:16,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:16,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:16,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:16,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:16,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 447 transitions, 6715 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:16,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:16,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:16,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:17,450 INFO L124 PetriNetUnfolderBase]: 3895/5859 cut-off events. [2024-06-04 15:36:17,450 INFO L125 PetriNetUnfolderBase]: For 700717/700717 co-relation queries the response was YES. [2024-06-04 15:36:17,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55404 conditions, 5859 events. 3895/5859 cut-off events. For 700717/700717 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31604 event pairs, 786 based on Foata normal form. 2/5859 useless extension candidates. Maximal degree in co-relation 55253. Up to 5733 conditions per place. [2024-06-04 15:36:17,533 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 424 selfloop transitions, 51 changer transitions 0/478 dead transitions. [2024-06-04 15:36:17,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 478 transitions, 8141 flow [2024-06-04 15:36:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:36:17,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:36:17,535 INFO L175 Difference]: Start difference. First operand has 314 places, 447 transitions, 6715 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:36:17,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 478 transitions, 8141 flow [2024-06-04 15:36:19,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 478 transitions, 7998 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:19,241 INFO L231 Difference]: Finished difference. Result has 319 places, 456 transitions, 6956 flow [2024-06-04 15:36:19,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6572, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6956, PETRI_PLACES=319, PETRI_TRANSITIONS=456} [2024-06-04 15:36:19,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-04 15:36:19,242 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 456 transitions, 6956 flow [2024-06-04 15:36:19,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:19,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:19,242 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 15:36:19,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 15:36:19,242 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 15:36:19,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:19,242 INFO L85 PathProgramCache]: Analyzing trace with hash -869794305, now seen corresponding path program 2 times [2024-06-04 15:36:19,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:19,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797985711] [2024-06-04 15:36:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:19,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:19,959 INFO 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 15:36:19,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:19,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797985711] [2024-06-04 15:36:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797985711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:19,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:19,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:19,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47032189] [2024-06-04 15:36:19,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:19,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:19,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:20,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:20,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 456 transitions, 6956 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:20,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:20,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:20,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:21,293 INFO L124 PetriNetUnfolderBase]: 3900/5866 cut-off events. [2024-06-04 15:36:21,293 INFO L125 PetriNetUnfolderBase]: For 716214/716214 co-relation queries the response was YES. [2024-06-04 15:36:21,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55687 conditions, 5866 events. 3900/5866 cut-off events. For 716214/716214 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31657 event pairs, 787 based on Foata normal form. 1/5865 useless extension candidates. Maximal degree in co-relation 55534. Up to 5809 conditions per place. [2024-06-04 15:36:21,376 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 447 selfloop transitions, 25 changer transitions 0/475 dead transitions. [2024-06-04 15:36:21,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 475 transitions, 8034 flow [2024-06-04 15:36:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-04 15:36:21,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-04 15:36:21,377 INFO L175 Difference]: Start difference. First operand has 319 places, 456 transitions, 6956 flow. Second operand 8 states and 118 transitions. [2024-06-04 15:36:21,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 475 transitions, 8034 flow [2024-06-04 15:36:23,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 475 transitions, 7905 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:23,129 INFO L231 Difference]: Finished difference. Result has 323 places, 459 transitions, 6965 flow [2024-06-04 15:36:23,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6965, PETRI_PLACES=323, PETRI_TRANSITIONS=459} [2024-06-04 15:36:23,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-04 15:36:23,129 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 459 transitions, 6965 flow [2024-06-04 15:36:23,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:23,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:23,129 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 15:36:23,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 15:36:23,130 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 15:36:23,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:23,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2123247089, now seen corresponding path program 5 times [2024-06-04 15:36:23,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:23,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550944617] [2024-06-04 15:36:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:23,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:23,823 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 15:36:23,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550944617] [2024-06-04 15:36:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550944617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:23,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:23,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:23,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29988436] [2024-06-04 15:36:23,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:23,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:23,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:23,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:23,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:23,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:23,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 459 transitions, 6965 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:23,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:23,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:23,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:25,298 INFO L124 PetriNetUnfolderBase]: 3894/5857 cut-off events. [2024-06-04 15:36:25,298 INFO L125 PetriNetUnfolderBase]: For 728270/728270 co-relation queries the response was YES. [2024-06-04 15:36:25,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55628 conditions, 5857 events. 3894/5857 cut-off events. For 728270/728270 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31580 event pairs, 778 based on Foata normal form. 2/5857 useless extension candidates. Maximal degree in co-relation 55474. Up to 5701 conditions per place. [2024-06-04 15:36:25,373 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 421 selfloop transitions, 55 changer transitions 0/479 dead transitions. [2024-06-04 15:36:25,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 479 transitions, 8150 flow [2024-06-04 15:36:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 15:36:25,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-04 15:36:25,374 INFO L175 Difference]: Start difference. First operand has 323 places, 459 transitions, 6965 flow. Second operand 8 states and 126 transitions. [2024-06-04 15:36:25,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 479 transitions, 8150 flow [2024-06-04 15:36:26,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 479 transitions, 8056 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:26,930 INFO L231 Difference]: Finished difference. Result has 325 places, 459 transitions, 6987 flow [2024-06-04 15:36:26,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6871, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6987, PETRI_PLACES=325, PETRI_TRANSITIONS=459} [2024-06-04 15:36:26,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-04 15:36:26,930 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 459 transitions, 6987 flow [2024-06-04 15:36:26,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:26,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:26,930 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 15:36:26,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 15:36:26,931 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 15:36:26,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:26,931 INFO L85 PathProgramCache]: Analyzing trace with hash -869914461, now seen corresponding path program 6 times [2024-06-04 15:36:26,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:26,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827168222] [2024-06-04 15:36:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:26,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:27,594 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 15:36:27,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:27,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827168222] [2024-06-04 15:36:27,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827168222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:27,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:27,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:27,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023210405] [2024-06-04 15:36:27,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:27,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:27,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:27,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:27,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 459 transitions, 6987 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:27,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:27,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:27,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:29,002 INFO L124 PetriNetUnfolderBase]: 3888/5849 cut-off events. [2024-06-04 15:36:29,002 INFO L125 PetriNetUnfolderBase]: For 740322/740322 co-relation queries the response was YES. [2024-06-04 15:36:29,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55700 conditions, 5849 events. 3888/5849 cut-off events. For 740322/740322 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31547 event pairs, 777 based on Foata normal form. 2/5849 useless extension candidates. Maximal degree in co-relation 55545. Up to 5717 conditions per place. [2024-06-04 15:36:29,082 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 45 changer transitions 0/477 dead transitions. [2024-06-04 15:36:29,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 477 transitions, 8008 flow [2024-06-04 15:36:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 15:36:29,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 15:36:29,083 INFO L175 Difference]: Start difference. First operand has 325 places, 459 transitions, 6987 flow. Second operand 8 states and 123 transitions. [2024-06-04 15:36:29,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 477 transitions, 8008 flow [2024-06-04 15:36:30,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 477 transitions, 7869 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:30,838 INFO L231 Difference]: Finished difference. Result has 329 places, 460 transitions, 6959 flow [2024-06-04 15:36:30,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6959, PETRI_PLACES=329, PETRI_TRANSITIONS=460} [2024-06-04 15:36:30,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-04 15:36:30,838 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 460 transitions, 6959 flow [2024-06-04 15:36:30,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:30,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:30,838 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 15:36:30,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 15:36:30,839 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 15:36:30,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash -869794119, now seen corresponding path program 2 times [2024-06-04 15:36:30,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:30,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134105987] [2024-06-04 15:36:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:30,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:31,521 INFO 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 15:36:31,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:31,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134105987] [2024-06-04 15:36:31,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134105987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:31,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:31,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:31,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011004316] [2024-06-04 15:36:31,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:31,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:31,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:31,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:31,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:31,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:31,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 460 transitions, 6959 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:31,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:31,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:31,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:32,902 INFO L124 PetriNetUnfolderBase]: 3898/5864 cut-off events. [2024-06-04 15:36:32,903 INFO L125 PetriNetUnfolderBase]: For 757210/757210 co-relation queries the response was YES. [2024-06-04 15:36:32,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56017 conditions, 5864 events. 3898/5864 cut-off events. For 757210/757210 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31629 event pairs, 787 based on Foata normal form. 2/5864 useless extension candidates. Maximal degree in co-relation 55860. Up to 5783 conditions per place. [2024-06-04 15:36:32,984 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 442 selfloop transitions, 37 changer transitions 0/482 dead transitions. [2024-06-04 15:36:32,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 482 transitions, 8223 flow [2024-06-04 15:36:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 15:36:32,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-04 15:36:32,985 INFO L175 Difference]: Start difference. First operand has 329 places, 460 transitions, 6959 flow. Second operand 8 states and 125 transitions. [2024-06-04 15:36:32,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 482 transitions, 8223 flow [2024-06-04 15:36:34,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 482 transitions, 8135 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:34,710 INFO L231 Difference]: Finished difference. Result has 333 places, 463 transitions, 7025 flow [2024-06-04 15:36:34,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6871, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7025, PETRI_PLACES=333, PETRI_TRANSITIONS=463} [2024-06-04 15:36:34,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-04 15:36:34,710 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 463 transitions, 7025 flow [2024-06-04 15:36:34,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:34,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:34,710 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 15:36:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 15:36:34,711 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 15:36:34,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:34,711 INFO L85 PathProgramCache]: Analyzing trace with hash -675657429, now seen corresponding path program 3 times [2024-06-04 15:36:34,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:34,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503070278] [2024-06-04 15:36:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:34,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:35,390 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 15:36:35,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503070278] [2024-06-04 15:36:35,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503070278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:35,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:35,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:35,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136038344] [2024-06-04 15:36:35,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:35,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:35,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:35,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:35,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:35,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:35,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 463 transitions, 7025 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:35,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:35,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:35,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:36,821 INFO L124 PetriNetUnfolderBase]: 3892/5856 cut-off events. [2024-06-04 15:36:36,821 INFO L125 PetriNetUnfolderBase]: For 769061/769061 co-relation queries the response was YES. [2024-06-04 15:36:36,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55974 conditions, 5856 events. 3892/5856 cut-off events. For 769061/769061 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31545 event pairs, 797 based on Foata normal form. 2/5856 useless extension candidates. Maximal degree in co-relation 55816. Up to 5787 conditions per place. [2024-06-04 15:36:36,906 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 445 selfloop transitions, 32 changer transitions 0/480 dead transitions. [2024-06-04 15:36:36,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 480 transitions, 8045 flow [2024-06-04 15:36:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 15:36:36,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-04 15:36:36,907 INFO L175 Difference]: Start difference. First operand has 333 places, 463 transitions, 7025 flow. Second operand 8 states and 121 transitions. [2024-06-04 15:36:36,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 480 transitions, 8045 flow [2024-06-04 15:36:38,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 480 transitions, 7855 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:38,800 INFO L231 Difference]: Finished difference. Result has 335 places, 463 transitions, 6905 flow [2024-06-04 15:36:38,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6835, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6905, PETRI_PLACES=335, PETRI_TRANSITIONS=463} [2024-06-04 15:36:38,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-04 15:36:38,801 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 463 transitions, 6905 flow [2024-06-04 15:36:38,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:38,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:38,801 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 15:36:38,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 15:36:38,801 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 15:36:38,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:38,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1160398583, now seen corresponding path program 1 times [2024-06-04 15:36:38,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:38,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636340575] [2024-06-04 15:36:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:38,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:40,063 INFO 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 15:36:40,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:40,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636340575] [2024-06-04 15:36:40,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636340575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:40,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:40,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:40,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815977395] [2024-06-04 15:36:40,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:40,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:40,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:40,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:40,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:40,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:40,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 463 transitions, 6905 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:36:40,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:40,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:40,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:41,648 INFO L124 PetriNetUnfolderBase]: 3900/5868 cut-off events. [2024-06-04 15:36:41,648 INFO L125 PetriNetUnfolderBase]: For 787866/787866 co-relation queries the response was YES. [2024-06-04 15:36:41,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56109 conditions, 5868 events. 3900/5868 cut-off events. For 787866/787866 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31628 event pairs, 786 based on Foata normal form. 2/5868 useless extension candidates. Maximal degree in co-relation 55951. Up to 5785 conditions per place. [2024-06-04 15:36:41,727 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 440 selfloop transitions, 39 changer transitions 0/482 dead transitions. [2024-06-04 15:36:41,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 482 transitions, 7977 flow [2024-06-04 15:36:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 15:36:41,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 15:36:41,728 INFO L175 Difference]: Start difference. First operand has 335 places, 463 transitions, 6905 flow. Second operand 8 states and 123 transitions. [2024-06-04 15:36:41,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 482 transitions, 7977 flow [2024-06-04 15:36:43,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 482 transitions, 7900 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 15:36:43,706 INFO L231 Difference]: Finished difference. Result has 336 places, 465 transitions, 6969 flow [2024-06-04 15:36:43,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6969, PETRI_PLACES=336, PETRI_TRANSITIONS=465} [2024-06-04 15:36:43,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-04 15:36:43,707 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 465 transitions, 6969 flow [2024-06-04 15:36:43,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:36:43,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:43,707 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 15:36:43,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 15:36:43,707 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 15:36:43,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1160029187, now seen corresponding path program 3 times [2024-06-04 15:36:43,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:43,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597404296] [2024-06-04 15:36:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:43,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:44,831 INFO 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 15:36:44,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:44,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597404296] [2024-06-04 15:36:44,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597404296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:44,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:44,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:44,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093317080] [2024-06-04 15:36:44,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:44,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:44,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:44,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:44,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:44,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:44,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 465 transitions, 6969 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:36:44,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:44,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:44,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:46,461 INFO L124 PetriNetUnfolderBase]: 3908/5879 cut-off events. [2024-06-04 15:36:46,462 INFO L125 PetriNetUnfolderBase]: For 805401/805401 co-relation queries the response was YES. [2024-06-04 15:36:46,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56528 conditions, 5879 events. 3908/5879 cut-off events. For 805401/805401 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31691 event pairs, 754 based on Foata normal form. 2/5879 useless extension candidates. Maximal degree in co-relation 56369. Up to 5747 conditions per place. [2024-06-04 15:36:46,536 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 43 changer transitions 0/484 dead transitions. [2024-06-04 15:36:46,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 484 transitions, 8015 flow [2024-06-04 15:36:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 15:36:46,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 15:36:46,537 INFO L175 Difference]: Start difference. First operand has 336 places, 465 transitions, 6969 flow. Second operand 8 states and 123 transitions. [2024-06-04 15:36:46,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 484 transitions, 8015 flow [2024-06-04 15:36:48,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 484 transitions, 7890 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:48,384 INFO L231 Difference]: Finished difference. Result has 338 places, 467 transitions, 6963 flow [2024-06-04 15:36:48,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6844, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6963, PETRI_PLACES=338, PETRI_TRANSITIONS=467} [2024-06-04 15:36:48,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-04 15:36:48,385 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 467 transitions, 6963 flow [2024-06-04 15:36:48,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:36:48,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:48,386 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 15:36:48,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 15:36:48,386 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 15:36:48,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:48,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2090490117, now seen corresponding path program 3 times [2024-06-04 15:36:48,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:48,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219536015] [2024-06-04 15:36:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:48,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:49,252 INFO 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 15:36:49,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:49,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219536015] [2024-06-04 15:36:49,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219536015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:49,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:49,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:49,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357533019] [2024-06-04 15:36:49,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:49,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:49,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:49,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:49,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 467 transitions, 6963 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:49,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:49,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:49,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:50,602 INFO L124 PetriNetUnfolderBase]: 3905/5878 cut-off events. [2024-06-04 15:36:50,603 INFO L125 PetriNetUnfolderBase]: For 817365/817390 co-relation queries the response was YES. [2024-06-04 15:36:50,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56578 conditions, 5878 events. 3905/5878 cut-off events. For 817365/817390 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31716 event pairs, 780 based on Foata normal form. 19/5893 useless extension candidates. Maximal degree in co-relation 56418. Up to 5684 conditions per place. [2024-06-04 15:36:50,687 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 76 changer transitions 0/485 dead transitions. [2024-06-04 15:36:50,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 485 transitions, 8159 flow [2024-06-04 15:36:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 15:36:50,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-04 15:36:50,689 INFO L175 Difference]: Start difference. First operand has 338 places, 467 transitions, 6963 flow. Second operand 8 states and 125 transitions. [2024-06-04 15:36:50,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 485 transitions, 8159 flow [2024-06-04 15:36:52,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 485 transitions, 8038 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:52,835 INFO L231 Difference]: Finished difference. Result has 340 places, 467 transitions, 7000 flow [2024-06-04 15:36:52,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6842, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7000, PETRI_PLACES=340, PETRI_TRANSITIONS=467} [2024-06-04 15:36:52,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-04 15:36:52,836 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 467 transitions, 7000 flow [2024-06-04 15:36:52,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:52,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:52,836 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 15:36:52,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 15:36:52,836 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 15:36:52,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1862081931, now seen corresponding path program 7 times [2024-06-04 15:36:52,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:52,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065461244] [2024-06-04 15:36:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:52,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:53,571 INFO 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 15:36:53,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:53,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065461244] [2024-06-04 15:36:53,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065461244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:53,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:53,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:53,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053799519] [2024-06-04 15:36:53,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:53,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:53,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:53,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:53,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:53,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:53,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 467 transitions, 7000 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:53,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:53,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:53,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:54,955 INFO L124 PetriNetUnfolderBase]: 3983/5987 cut-off events. [2024-06-04 15:36:54,955 INFO L125 PetriNetUnfolderBase]: For 877314/877337 co-relation queries the response was YES. [2024-06-04 15:36:55,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58247 conditions, 5987 events. 3983/5987 cut-off events. For 877314/877337 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32346 event pairs, 732 based on Foata normal form. 14/5995 useless extension candidates. Maximal degree in co-relation 58086. Up to 4938 conditions per place. [2024-06-04 15:36:55,047 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 364 selfloop transitions, 159 changer transitions 0/526 dead transitions. [2024-06-04 15:36:55,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 526 transitions, 9231 flow [2024-06-04 15:36:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:36:55,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:36:55,048 INFO L175 Difference]: Start difference. First operand has 340 places, 467 transitions, 7000 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:36:55,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 526 transitions, 9231 flow [2024-06-04 15:36:57,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 526 transitions, 9057 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:57,281 INFO L231 Difference]: Finished difference. Result has 345 places, 496 transitions, 7861 flow [2024-06-04 15:36:57,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6826, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7861, PETRI_PLACES=345, PETRI_TRANSITIONS=496} [2024-06-04 15:36:57,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-04 15:36:57,282 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 496 transitions, 7861 flow [2024-06-04 15:36:57,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:57,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:57,282 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 15:36:57,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 15:36:57,282 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 15:36:57,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1862380461, now seen corresponding path program 8 times [2024-06-04 15:36:57,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:57,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848811155] [2024-06-04 15:36:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:57,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:58,053 INFO 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 15:36:58,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:58,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848811155] [2024-06-04 15:36:58,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848811155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:58,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:58,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:58,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632266313] [2024-06-04 15:36:58,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:58,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:58,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:58,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:58,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:58,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:58,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 496 transitions, 7861 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:58,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:58,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:58,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:59,495 INFO L124 PetriNetUnfolderBase]: 4025/6046 cut-off events. [2024-06-04 15:36:59,496 INFO L125 PetriNetUnfolderBase]: For 911162/911185 co-relation queries the response was YES. [2024-06-04 15:36:59,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61030 conditions, 6046 events. 4025/6046 cut-off events. For 911162/911185 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32722 event pairs, 730 based on Foata normal form. 14/6054 useless extension candidates. Maximal degree in co-relation 60865. Up to 4977 conditions per place. [2024-06-04 15:36:59,584 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 369 selfloop transitions, 159 changer transitions 0/531 dead transitions. [2024-06-04 15:36:59,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 531 transitions, 9785 flow [2024-06-04 15:36:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:36:59,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-04 15:36:59,585 INFO L175 Difference]: Start difference. First operand has 345 places, 496 transitions, 7861 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:36:59,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 531 transitions, 9785 flow [2024-06-04 15:37:01,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 531 transitions, 9526 flow, removed 113 selfloop flow, removed 2 redundant places. [2024-06-04 15:37:01,719 INFO L231 Difference]: Finished difference. Result has 352 places, 504 transitions, 8137 flow [2024-06-04 15:37:01,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7646, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8137, PETRI_PLACES=352, PETRI_TRANSITIONS=504} [2024-06-04 15:37:01,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-04 15:37:01,720 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 504 transitions, 8137 flow [2024-06-04 15:37:01,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:01,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:01,720 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 15:37:01,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 15:37:01,720 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 15:37:01,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1862380647, now seen corresponding path program 4 times [2024-06-04 15:37:01,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:01,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590329529] [2024-06-04 15:37:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:01,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:02,482 INFO 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 15:37:02,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:02,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590329529] [2024-06-04 15:37:02,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590329529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:02,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:02,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:02,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752100455] [2024-06-04 15:37:02,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:02,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:02,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:02,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:02,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:02,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:02,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 504 transitions, 8137 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:02,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:02,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:02,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:03,950 INFO L124 PetriNetUnfolderBase]: 4022/6041 cut-off events. [2024-06-04 15:37:03,950 INFO L125 PetriNetUnfolderBase]: For 906797/906822 co-relation queries the response was YES. [2024-06-04 15:37:04,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61143 conditions, 6041 events. 4022/6041 cut-off events. For 906797/906822 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32709 event pairs, 782 based on Foata normal form. 19/6056 useless extension candidates. Maximal degree in co-relation 60975. Up to 5848 conditions per place. [2024-06-04 15:37:04,041 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 447 selfloop transitions, 71 changer transitions 0/521 dead transitions. [2024-06-04 15:37:04,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 521 transitions, 9239 flow [2024-06-04 15:37:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 15:37:04,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-04 15:37:04,043 INFO L175 Difference]: Start difference. First operand has 352 places, 504 transitions, 8137 flow. Second operand 8 states and 124 transitions. [2024-06-04 15:37:04,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 521 transitions, 9239 flow [2024-06-04 15:37:06,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 521 transitions, 8871 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:06,505 INFO L231 Difference]: Finished difference. Result has 355 places, 504 transitions, 7917 flow [2024-06-04 15:37:06,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7769, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7917, PETRI_PLACES=355, PETRI_TRANSITIONS=504} [2024-06-04 15:37:06,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-04 15:37:06,505 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 504 transitions, 7917 flow [2024-06-04 15:37:06,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:06,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:06,505 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 15:37:06,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 15:37:06,506 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 15:37:06,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:06,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1672740537, now seen corresponding path program 4 times [2024-06-04 15:37:06,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:06,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667289481] [2024-06-04 15:37:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:06,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:07,264 INFO 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 15:37:07,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:07,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667289481] [2024-06-04 15:37:07,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667289481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:07,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:07,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:07,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241157771] [2024-06-04 15:37:07,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:07,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:07,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:07,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:07,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:07,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:07,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 504 transitions, 7917 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:07,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:07,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:07,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:08,774 INFO L124 PetriNetUnfolderBase]: 4026/6047 cut-off events. [2024-06-04 15:37:08,774 INFO L125 PetriNetUnfolderBase]: For 930065/930090 co-relation queries the response was YES. [2024-06-04 15:37:08,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60644 conditions, 6047 events. 4026/6047 cut-off events. For 930065/930090 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32752 event pairs, 732 based on Foata normal form. 22/6065 useless extension candidates. Maximal degree in co-relation 60475. Up to 5514 conditions per place. [2024-06-04 15:37:08,852 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 385 selfloop transitions, 141 changer transitions 0/529 dead transitions. [2024-06-04 15:37:08,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 529 transitions, 9496 flow [2024-06-04 15:37:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 15:37:08,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-04 15:37:08,854 INFO L175 Difference]: Start difference. First operand has 355 places, 504 transitions, 7917 flow. Second operand 8 states and 133 transitions. [2024-06-04 15:37:08,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 529 transitions, 9496 flow [2024-06-04 15:37:11,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 529 transitions, 9322 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:11,115 INFO L231 Difference]: Finished difference. Result has 357 places, 507 transitions, 8121 flow [2024-06-04 15:37:11,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8121, PETRI_PLACES=357, PETRI_TRANSITIONS=507} [2024-06-04 15:37:11,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-04 15:37:11,116 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 507 transitions, 8121 flow [2024-06-04 15:37:11,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:11,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:11,116 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 15:37:11,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 15:37:11,116 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 15:37:11,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2027003577, now seen corresponding path program 5 times [2024-06-04 15:37:11,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:11,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718064704] [2024-06-04 15:37:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:11,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:11,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:11,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718064704] [2024-06-04 15:37:11,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718064704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:11,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:11,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:11,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20567257] [2024-06-04 15:37:11,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:11,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:11,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:11,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:11,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 507 transitions, 8121 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:11,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:11,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:11,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:13,673 INFO L124 PetriNetUnfolderBase]: 4030/6051 cut-off events. [2024-06-04 15:37:13,673 INFO L125 PetriNetUnfolderBase]: For 944535/944535 co-relation queries the response was YES. [2024-06-04 15:37:13,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61134 conditions, 6051 events. 4030/6051 cut-off events. For 944535/944535 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 32776 event pairs, 736 based on Foata normal form. 4/6053 useless extension candidates. Maximal degree in co-relation 60964. Up to 5902 conditions per place. [2024-06-04 15:37:13,750 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 475 selfloop transitions, 54 changer transitions 0/532 dead transitions. [2024-06-04 15:37:13,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 532 transitions, 9697 flow [2024-06-04 15:37:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-04 15:37:13,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-04 15:37:13,752 INFO L175 Difference]: Start difference. First operand has 357 places, 507 transitions, 8121 flow. Second operand 9 states and 141 transitions. [2024-06-04 15:37:13,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 532 transitions, 9697 flow [2024-06-04 15:37:15,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 532 transitions, 9195 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-04 15:37:15,910 INFO L231 Difference]: Finished difference. Result has 358 places, 510 transitions, 7806 flow [2024-06-04 15:37:15,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7625, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7806, PETRI_PLACES=358, PETRI_TRANSITIONS=510} [2024-06-04 15:37:15,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-04 15:37:15,911 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 510 transitions, 7806 flow [2024-06-04 15:37:15,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:15,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:15,911 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 15:37:15,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 15:37:15,912 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 15:37:15,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2027003205, now seen corresponding path program 9 times [2024-06-04 15:37:15,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:15,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540022127] [2024-06-04 15:37:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:15,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:16,675 INFO 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 15:37:16,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:16,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540022127] [2024-06-04 15:37:16,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540022127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:16,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:16,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:16,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544502309] [2024-06-04 15:37:16,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:16,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:16,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:16,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:16,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 510 transitions, 7806 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:16,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:16,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:16,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:18,385 INFO L124 PetriNetUnfolderBase]: 4156/6228 cut-off events. [2024-06-04 15:37:18,385 INFO L125 PetriNetUnfolderBase]: For 1023111/1023111 co-relation queries the response was YES. [2024-06-04 15:37:18,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62145 conditions, 6228 events. 4156/6228 cut-off events. For 1023111/1023111 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33720 event pairs, 712 based on Foata normal form. 18/6244 useless extension candidates. Maximal degree in co-relation 61976. Up to 5846 conditions per place. [2024-06-04 15:37:18,478 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 470 selfloop transitions, 82 changer transitions 0/555 dead transitions. [2024-06-04 15:37:18,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 555 transitions, 9753 flow [2024-06-04 15:37:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 15:37:18,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-04 15:37:18,479 INFO L175 Difference]: Start difference. First operand has 358 places, 510 transitions, 7806 flow. Second operand 9 states and 151 transitions. [2024-06-04 15:37:18,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 555 transitions, 9753 flow [2024-06-04 15:37:21,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 555 transitions, 9515 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-04 15:37:21,519 INFO L231 Difference]: Finished difference. Result has 361 places, 530 transitions, 8207 flow [2024-06-04 15:37:21,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7568, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8207, PETRI_PLACES=361, PETRI_TRANSITIONS=530} [2024-06-04 15:37:21,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-04 15:37:21,520 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 530 transitions, 8207 flow [2024-06-04 15:37:21,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:21,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:21,520 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 15:37:21,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 15:37:21,520 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 15:37:21,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:21,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1387925539, now seen corresponding path program 10 times [2024-06-04 15:37:21,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:21,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968791973] [2024-06-04 15:37:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:22,257 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 15:37:22,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:22,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968791973] [2024-06-04 15:37:22,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968791973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:22,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:22,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:22,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566774367] [2024-06-04 15:37:22,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:22,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:22,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:22,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:22,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:22,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:22,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 530 transitions, 8207 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:22,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:22,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:22,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:23,874 INFO L124 PetriNetUnfolderBase]: 4330/6471 cut-off events. [2024-06-04 15:37:23,874 INFO L125 PetriNetUnfolderBase]: For 1087977/1087977 co-relation queries the response was YES. [2024-06-04 15:37:23,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65873 conditions, 6471 events. 4330/6471 cut-off events. For 1087977/1087977 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 35126 event pairs, 734 based on Foata normal form. 18/6487 useless extension candidates. Maximal degree in co-relation 65702. Up to 5427 conditions per place. [2024-06-04 15:37:23,972 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 428 selfloop transitions, 161 changer transitions 0/592 dead transitions. [2024-06-04 15:37:23,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 592 transitions, 10490 flow [2024-06-04 15:37:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 15:37:23,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-04 15:37:23,976 INFO L175 Difference]: Start difference. First operand has 361 places, 530 transitions, 8207 flow. Second operand 8 states and 156 transitions. [2024-06-04 15:37:23,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 592 transitions, 10490 flow [2024-06-04 15:37:27,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 592 transitions, 10302 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:27,421 INFO L231 Difference]: Finished difference. Result has 367 places, 556 transitions, 9095 flow [2024-06-04 15:37:27,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8019, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9095, PETRI_PLACES=367, PETRI_TRANSITIONS=556} [2024-06-04 15:37:27,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-04 15:37:27,422 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 556 transitions, 9095 flow [2024-06-04 15:37:27,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:27,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:27,423 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 15:37:27,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 15:37:27,423 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 15:37:27,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:27,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1193454847, now seen corresponding path program 6 times [2024-06-04 15:37:27,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:27,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975735791] [2024-06-04 15:37:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:27,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:28,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975735791] [2024-06-04 15:37:28,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975735791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:28,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:28,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:28,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727874953] [2024-06-04 15:37:28,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:28,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:28,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:28,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:28,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:28,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 556 transitions, 9095 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:28,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:28,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:28,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:29,762 INFO L124 PetriNetUnfolderBase]: 4334/6478 cut-off events. [2024-06-04 15:37:29,762 INFO L125 PetriNetUnfolderBase]: For 1051985/1051985 co-relation queries the response was YES. [2024-06-04 15:37:29,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67620 conditions, 6478 events. 4334/6478 cut-off events. For 1051985/1051985 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35198 event pairs, 782 based on Foata normal form. 4/6480 useless extension candidates. Maximal degree in co-relation 67445. Up to 6172 conditions per place. [2024-06-04 15:37:29,861 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 499 selfloop transitions, 84 changer transitions 0/586 dead transitions. [2024-06-04 15:37:29,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 586 transitions, 10823 flow [2024-06-04 15:37:29,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:37:29,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-04 15:37:29,862 INFO L175 Difference]: Start difference. First operand has 367 places, 556 transitions, 9095 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:37:29,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 586 transitions, 10823 flow [2024-06-04 15:37:33,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 586 transitions, 10554 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:33,230 INFO L231 Difference]: Finished difference. Result has 371 places, 559 transitions, 9093 flow [2024-06-04 15:37:33,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8830, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9093, PETRI_PLACES=371, PETRI_TRANSITIONS=559} [2024-06-04 15:37:33,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-04 15:37:33,231 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 559 transitions, 9093 flow [2024-06-04 15:37:33,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:33,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:33,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:33,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 15:37:33,232 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 15:37:33,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash -385786863, now seen corresponding path program 7 times [2024-06-04 15:37:33,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:33,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842589902] [2024-06-04 15:37:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:33,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:34,062 INFO 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 15:37:34,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:34,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842589902] [2024-06-04 15:37:34,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842589902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:34,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:34,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:34,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193672334] [2024-06-04 15:37:34,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:34,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:34,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:34,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:34,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:34,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 559 transitions, 9093 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:34,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:34,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:34,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:35,737 INFO L124 PetriNetUnfolderBase]: 4318/6456 cut-off events. [2024-06-04 15:37:35,737 INFO L125 PetriNetUnfolderBase]: For 1037644/1037644 co-relation queries the response was YES. [2024-06-04 15:37:35,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66582 conditions, 6456 events. 4318/6456 cut-off events. For 1037644/1037644 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 35072 event pairs, 728 based on Foata normal form. 4/6458 useless extension candidates. Maximal degree in co-relation 66406. Up to 6333 conditions per place. [2024-06-04 15:37:35,844 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 532 selfloop transitions, 42 changer transitions 0/577 dead transitions. [2024-06-04 15:37:35,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 577 transitions, 10325 flow [2024-06-04 15:37:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:37:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:37:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 15:37:35,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 15:37:35,845 INFO L175 Difference]: Start difference. First operand has 371 places, 559 transitions, 9093 flow. Second operand 8 states and 123 transitions. [2024-06-04 15:37:35,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 577 transitions, 10325 flow [2024-06-04 15:37:38,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 577 transitions, 10115 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-04 15:37:38,054 INFO L231 Difference]: Finished difference. Result has 376 places, 559 transitions, 8981 flow [2024-06-04 15:37:38,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8883, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8981, PETRI_PLACES=376, PETRI_TRANSITIONS=559} [2024-06-04 15:37:38,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-04 15:37:38,055 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 559 transitions, 8981 flow [2024-06-04 15:37:38,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:38,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:38,055 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 15:37:38,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 15:37:38,055 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 15:37:38,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:38,055 INFO L85 PathProgramCache]: Analyzing trace with hash -390440955, now seen corresponding path program 11 times [2024-06-04 15:37:38,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:38,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409328376] [2024-06-04 15:37:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:38,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:38,764 INFO 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 15:37:38,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:38,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409328376] [2024-06-04 15:37:38,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409328376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:38,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:38,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:38,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557073557] [2024-06-04 15:37:38,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:38,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:38,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:38,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:38,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:38,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 559 transitions, 8981 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:38,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:38,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:38,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:40,410 INFO L124 PetriNetUnfolderBase]: 4336/6481 cut-off events. [2024-06-04 15:37:40,410 INFO L125 PetriNetUnfolderBase]: For 1057627/1057627 co-relation queries the response was YES. [2024-06-04 15:37:40,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66502 conditions, 6481 events. 4336/6481 cut-off events. For 1057627/1057627 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35250 event pairs, 785 based on Foata normal form. 6/6485 useless extension candidates. Maximal degree in co-relation 66324. Up to 6173 conditions per place. [2024-06-04 15:37:40,509 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 507 selfloop transitions, 81 changer transitions 0/591 dead transitions. [2024-06-04 15:37:40,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 591 transitions, 10572 flow [2024-06-04 15:37:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 15:37:40,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-04 15:37:40,510 INFO L175 Difference]: Start difference. First operand has 376 places, 559 transitions, 8981 flow. Second operand 7 states and 129 transitions. [2024-06-04 15:37:40,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 591 transitions, 10572 flow [2024-06-04 15:37:43,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 591 transitions, 10474 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:43,290 INFO L231 Difference]: Finished difference. Result has 377 places, 563 transitions, 9214 flow [2024-06-04 15:37:43,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8883, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9214, PETRI_PLACES=377, PETRI_TRANSITIONS=563} [2024-06-04 15:37:43,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-04 15:37:43,290 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 563 transitions, 9214 flow [2024-06-04 15:37:43,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:43,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:43,291 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 15:37:43,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 15:37:43,291 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 15:37:43,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:43,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2066101045, now seen corresponding path program 8 times [2024-06-04 15:37:43,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:43,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934711714] [2024-06-04 15:37:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:43,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:44,005 INFO 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 15:37:44,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:44,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934711714] [2024-06-04 15:37:44,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934711714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:44,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:44,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:44,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845950471] [2024-06-04 15:37:44,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:44,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:44,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:44,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:44,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:44,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 563 transitions, 9214 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:44,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:44,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:44,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:45,662 INFO L124 PetriNetUnfolderBase]: 4346/6496 cut-off events. [2024-06-04 15:37:45,662 INFO L125 PetriNetUnfolderBase]: For 1065671/1065671 co-relation queries the response was YES. [2024-06-04 15:37:45,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67317 conditions, 6496 events. 4346/6496 cut-off events. For 1065671/1065671 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35264 event pairs, 840 based on Foata normal form. 2/6496 useless extension candidates. Maximal degree in co-relation 67137. Up to 6399 conditions per place. [2024-06-04 15:37:45,760 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 543 selfloop transitions, 41 changer transitions 0/587 dead transitions. [2024-06-04 15:37:45,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 587 transitions, 10724 flow [2024-06-04 15:37:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:37:45,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-04 15:37:45,761 INFO L175 Difference]: Start difference. First operand has 377 places, 563 transitions, 9214 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:37:45,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 587 transitions, 10724 flow [2024-06-04 15:37:48,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 587 transitions, 10555 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:48,923 INFO L231 Difference]: Finished difference. Result has 379 places, 566 transitions, 9205 flow [2024-06-04 15:37:48,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9047, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9205, PETRI_PLACES=379, PETRI_TRANSITIONS=566} [2024-06-04 15:37:48,923 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-04 15:37:48,923 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 566 transitions, 9205 flow [2024-06-04 15:37:48,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:48,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:48,924 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 15:37:48,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 15:37:48,924 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 15:37:48,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:48,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2066338195, now seen corresponding path program 9 times [2024-06-04 15:37:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:48,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622843868] [2024-06-04 15:37:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:48,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:49,650 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 15:37:49,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:49,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622843868] [2024-06-04 15:37:49,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622843868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:49,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:49,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:49,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437997009] [2024-06-04 15:37:49,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:49,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:49,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:49,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:49,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:49,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:49,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 566 transitions, 9205 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:49,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:49,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:49,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:51,349 INFO L124 PetriNetUnfolderBase]: 4340/6488 cut-off events. [2024-06-04 15:37:51,349 INFO L125 PetriNetUnfolderBase]: For 1055469/1055469 co-relation queries the response was YES. [2024-06-04 15:37:51,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66703 conditions, 6488 events. 4340/6488 cut-off events. For 1055469/1055469 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35225 event pairs, 787 based on Foata normal form. 2/6488 useless extension candidates. Maximal degree in co-relation 66523. Up to 6427 conditions per place. [2024-06-04 15:37:51,436 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 27 changer transitions 0/582 dead transitions. [2024-06-04 15:37:51,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 582 transitions, 10427 flow [2024-06-04 15:37:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-04 15:37:51,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-04 15:37:51,437 INFO L175 Difference]: Start difference. First operand has 379 places, 566 transitions, 9205 flow. Second operand 7 states and 110 transitions. [2024-06-04 15:37:51,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 582 transitions, 10427 flow [2024-06-04 15:37:54,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 582 transitions, 10155 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:54,363 INFO L231 Difference]: Finished difference. Result has 379 places, 566 transitions, 8993 flow [2024-06-04 15:37:54,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8933, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8993, PETRI_PLACES=379, PETRI_TRANSITIONS=566} [2024-06-04 15:37:54,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-04 15:37:54,364 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 566 transitions, 8993 flow [2024-06-04 15:37:54,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:54,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:54,364 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 15:37:54,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 15:37:54,364 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 15:37:54,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:54,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2066096023, now seen corresponding path program 12 times [2024-06-04 15:37:54,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:54,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610298225] [2024-06-04 15:37:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:54,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:55,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:55,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610298225] [2024-06-04 15:37:55,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610298225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:55,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:55,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:55,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817903445] [2024-06-04 15:37:55,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:55,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:55,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:55,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:55,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:55,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 566 transitions, 8993 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:55,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:55,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:55,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:56,890 INFO L124 PetriNetUnfolderBase]: 4351/6503 cut-off events. [2024-06-04 15:37:56,891 INFO L125 PetriNetUnfolderBase]: For 1079307/1079307 co-relation queries the response was YES. [2024-06-04 15:37:56,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66543 conditions, 6503 events. 4351/6503 cut-off events. For 1079307/1079307 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 35312 event pairs, 794 based on Foata normal form. 6/6507 useless extension candidates. Maximal degree in co-relation 66362. Up to 6309 conditions per place. [2024-06-04 15:37:56,975 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 535 selfloop transitions, 62 changer transitions 0/600 dead transitions. [2024-06-04 15:37:56,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 600 transitions, 10404 flow [2024-06-04 15:37:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 15:37:56,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-04 15:37:56,976 INFO L175 Difference]: Start difference. First operand has 379 places, 566 transitions, 8993 flow. Second operand 7 states and 129 transitions. [2024-06-04 15:37:56,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 600 transitions, 10404 flow [2024-06-04 15:38:00,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 600 transitions, 10287 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:00,256 INFO L231 Difference]: Finished difference. Result has 381 places, 573 transitions, 9145 flow [2024-06-04 15:38:00,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8876, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9145, PETRI_PLACES=381, PETRI_TRANSITIONS=573} [2024-06-04 15:38:00,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-04 15:38:00,257 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 573 transitions, 9145 flow [2024-06-04 15:38:00,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:00,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:00,258 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 15:38:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 15:38:00,258 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 15:38:00,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:00,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1610537779, now seen corresponding path program 2 times [2024-06-04 15:38:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:00,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177979157] [2024-06-04 15:38:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:01,404 INFO 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 15:38:01,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:01,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177979157] [2024-06-04 15:38:01,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177979157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:01,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:01,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:38:01,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404990318] [2024-06-04 15:38:01,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:01,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:38:01,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:01,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:38:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:38:01,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:01,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 573 transitions, 9145 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:01,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:01,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:01,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:03,262 INFO L124 PetriNetUnfolderBase]: 4359/6516 cut-off events. [2024-06-04 15:38:03,263 INFO L125 PetriNetUnfolderBase]: For 1086355/1086355 co-relation queries the response was YES. [2024-06-04 15:38:03,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67815 conditions, 6516 events. 4359/6516 cut-off events. For 1086355/1086355 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 35436 event pairs, 784 based on Foata normal form. 2/6516 useless extension candidates. Maximal degree in co-relation 67632. Up to 6450 conditions per place. [2024-06-04 15:38:03,354 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 560 selfloop transitions, 27 changer transitions 0/590 dead transitions. [2024-06-04 15:38:03,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 590 transitions, 10441 flow [2024-06-04 15:38:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:38:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:38:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-04 15:38:03,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-04 15:38:03,355 INFO L175 Difference]: Start difference. First operand has 381 places, 573 transitions, 9145 flow. Second operand 6 states and 100 transitions. [2024-06-04 15:38:03,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 590 transitions, 10441 flow [2024-06-04 15:38:07,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 590 transitions, 10346 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 15:38:07,270 INFO L231 Difference]: Finished difference. Result has 383 places, 575 transitions, 9179 flow [2024-06-04 15:38:07,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9050, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9179, PETRI_PLACES=383, PETRI_TRANSITIONS=575} [2024-06-04 15:38:07,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-04 15:38:07,270 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 575 transitions, 9179 flow [2024-06-04 15:38:07,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:07,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:07,271 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 15:38:07,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 15:38:07,271 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 15:38:07,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:07,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1211040469, now seen corresponding path program 3 times [2024-06-04 15:38:07,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:07,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59491747] [2024-06-04 15:38:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:07,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:08,586 INFO 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 15:38:08,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:08,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59491747] [2024-06-04 15:38:08,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59491747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:08,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:08,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:08,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116897658] [2024-06-04 15:38:08,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:08,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:08,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:08,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:08,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:08,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 575 transitions, 9179 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:08,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:08,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:08,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:10,417 INFO L124 PetriNetUnfolderBase]: 4367/6528 cut-off events. [2024-06-04 15:38:10,417 INFO L125 PetriNetUnfolderBase]: For 1110539/1110539 co-relation queries the response was YES. [2024-06-04 15:38:10,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68081 conditions, 6528 events. 4367/6528 cut-off events. For 1110539/1110539 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35499 event pairs, 786 based on Foata normal form. 2/6528 useless extension candidates. Maximal degree in co-relation 67898. Up to 6476 conditions per place. [2024-06-04 15:38:10,513 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 558 selfloop transitions, 29 changer transitions 0/590 dead transitions. [2024-06-04 15:38:10,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 590 transitions, 10493 flow [2024-06-04 15:38:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:10,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-04 15:38:10,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-04 15:38:10,514 INFO L175 Difference]: Start difference. First operand has 383 places, 575 transitions, 9179 flow. Second operand 9 states and 123 transitions. [2024-06-04 15:38:10,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 590 transitions, 10493 flow [2024-06-04 15:38:13,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 590 transitions, 10378 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 15:38:13,923 INFO L231 Difference]: Finished difference. Result has 389 places, 579 transitions, 9244 flow [2024-06-04 15:38:13,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9066, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9244, PETRI_PLACES=389, PETRI_TRANSITIONS=579} [2024-06-04 15:38:13,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-04 15:38:13,924 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 579 transitions, 9244 flow [2024-06-04 15:38:13,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:13,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:13,924 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 15:38:13,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 15:38:13,924 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 15:38:13,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1648931829, now seen corresponding path program 4 times [2024-06-04 15:38:13,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:13,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110924671] [2024-06-04 15:38:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:13,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110924671] [2024-06-04 15:38:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110924671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:15,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:15,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:38:15,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918681303] [2024-06-04 15:38:15,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:15,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:38:15,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:38:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:38:15,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:15,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 579 transitions, 9244 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:15,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:15,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:15,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:16,962 INFO L124 PetriNetUnfolderBase]: 4362/6521 cut-off events. [2024-06-04 15:38:16,962 INFO L125 PetriNetUnfolderBase]: For 1123120/1123120 co-relation queries the response was YES. [2024-06-04 15:38:17,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68022 conditions, 6521 events. 4362/6521 cut-off events. For 1123120/1123120 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35459 event pairs, 823 based on Foata normal form. 2/6521 useless extension candidates. Maximal degree in co-relation 67837. Up to 6441 conditions per place. [2024-06-04 15:38:17,061 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 562 selfloop transitions, 32 changer transitions 0/597 dead transitions. [2024-06-04 15:38:17,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 597 transitions, 10558 flow [2024-06-04 15:38:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:38:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:38:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 15:38:17,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:38:17,062 INFO L175 Difference]: Start difference. First operand has 389 places, 579 transitions, 9244 flow. Second operand 7 states and 112 transitions. [2024-06-04 15:38:17,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 597 transitions, 10558 flow [2024-06-04 15:38:20,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 597 transitions, 10383 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-04 15:38:20,895 INFO L231 Difference]: Finished difference. Result has 388 places, 581 transitions, 9216 flow [2024-06-04 15:38:20,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9069, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9216, PETRI_PLACES=388, PETRI_TRANSITIONS=581} [2024-06-04 15:38:20,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-04 15:38:20,896 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 581 transitions, 9216 flow [2024-06-04 15:38:20,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:20,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:20,896 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 15:38:20,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 15:38:20,896 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 15:38:20,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1210671073, now seen corresponding path program 4 times [2024-06-04 15:38:20,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:20,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526695316] [2024-06-04 15:38:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:20,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:21,949 INFO 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 15:38:21,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:21,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526695316] [2024-06-04 15:38:21,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526695316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:21,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:21,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:21,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608648153] [2024-06-04 15:38:21,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:21,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:21,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:21,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:22,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:22,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 581 transitions, 9216 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:22,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:22,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:22,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:23,827 INFO L124 PetriNetUnfolderBase]: 4401/6583 cut-off events. [2024-06-04 15:38:23,828 INFO L125 PetriNetUnfolderBase]: For 1194528/1194528 co-relation queries the response was YES. [2024-06-04 15:38:23,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68562 conditions, 6583 events. 4401/6583 cut-off events. For 1194528/1194528 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 35872 event pairs, 706 based on Foata normal form. 14/6595 useless extension candidates. Maximal degree in co-relation 68379. Up to 6349 conditions per place. [2024-06-04 15:38:23,932 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 558 selfloop transitions, 51 changer transitions 0/612 dead transitions. [2024-06-04 15:38:23,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 612 transitions, 10638 flow [2024-06-04 15:38:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:38:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:38:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-04 15:38:23,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-04 15:38:23,933 INFO L175 Difference]: Start difference. First operand has 388 places, 581 transitions, 9216 flow. Second operand 7 states and 130 transitions. [2024-06-04 15:38:23,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 612 transitions, 10638 flow [2024-06-04 15:38:27,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 612 transitions, 10455 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:27,577 INFO L231 Difference]: Finished difference. Result has 390 places, 582 transitions, 9182 flow [2024-06-04 15:38:27,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9033, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9182, PETRI_PLACES=390, PETRI_TRANSITIONS=582} [2024-06-04 15:38:27,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-04 15:38:27,577 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 582 transitions, 9182 flow [2024-06-04 15:38:27,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:27,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:27,578 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 15:38:27,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 15:38:27,578 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 15:38:27,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1909101339, now seen corresponding path program 1 times [2024-06-04 15:38:27,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:27,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440465991] [2024-06-04 15:38:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:27,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:28,651 INFO 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 15:38:28,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:28,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440465991] [2024-06-04 15:38:28,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440465991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:28,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:28,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:28,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683029474] [2024-06-04 15:38:28,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:28,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:28,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:28,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:28,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 582 transitions, 9182 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:28,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:28,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:28,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:30,462 INFO L124 PetriNetUnfolderBase]: 4430/6626 cut-off events. [2024-06-04 15:38:30,462 INFO L125 PetriNetUnfolderBase]: For 1181376/1181380 co-relation queries the response was YES. [2024-06-04 15:38:30,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69211 conditions, 6626 events. 4430/6626 cut-off events. For 1181376/1181380 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36247 event pairs, 758 based on Foata normal form. 8/6631 useless extension candidates. Maximal degree in co-relation 69027. Up to 6305 conditions per place. [2024-06-04 15:38:30,566 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 510 selfloop transitions, 102 changer transitions 0/615 dead transitions. [2024-06-04 15:38:30,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 615 transitions, 11074 flow [2024-06-04 15:38:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 15:38:30,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-04 15:38:30,567 INFO L175 Difference]: Start difference. First operand has 390 places, 582 transitions, 9182 flow. Second operand 9 states and 147 transitions. [2024-06-04 15:38:30,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 615 transitions, 11074 flow [2024-06-04 15:38:33,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 615 transitions, 10955 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:33,626 INFO L231 Difference]: Finished difference. Result has 394 places, 588 transitions, 9463 flow [2024-06-04 15:38:33,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9067, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9463, PETRI_PLACES=394, PETRI_TRANSITIONS=588} [2024-06-04 15:38:33,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-04 15:38:33,626 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 588 transitions, 9463 flow [2024-06-04 15:38:33,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:33,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:33,627 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 15:38:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 15:38:33,627 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 15:38:33,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:33,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1909161789, now seen corresponding path program 2 times [2024-06-04 15:38:33,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:33,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722496802] [2024-06-04 15:38:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:33,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:34,697 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 15:38:34,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:34,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722496802] [2024-06-04 15:38:34,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722496802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:34,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:34,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:34,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378770685] [2024-06-04 15:38:34,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:34,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:34,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:34,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:34,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:34,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:34,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 588 transitions, 9463 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:34,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:34,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:34,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:36,532 INFO L124 PetriNetUnfolderBase]: 4446/6651 cut-off events. [2024-06-04 15:38:36,532 INFO L125 PetriNetUnfolderBase]: For 1181309/1181325 co-relation queries the response was YES. [2024-06-04 15:38:36,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69662 conditions, 6651 events. 4446/6651 cut-off events. For 1181309/1181325 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36460 event pairs, 794 based on Foata normal form. 16/6663 useless extension candidates. Maximal degree in co-relation 69477. Up to 6398 conditions per place. [2024-06-04 15:38:36,632 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 513 selfloop transitions, 98 changer transitions 0/614 dead transitions. [2024-06-04 15:38:36,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 614 transitions, 11057 flow [2024-06-04 15:38:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:38:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:38:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-04 15:38:36,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-04 15:38:36,633 INFO L175 Difference]: Start difference. First operand has 394 places, 588 transitions, 9463 flow. Second operand 10 states and 154 transitions. [2024-06-04 15:38:36,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 614 transitions, 11057 flow [2024-06-04 15:38:40,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 614 transitions, 10752 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:40,477 INFO L231 Difference]: Finished difference. Result has 399 places, 591 transitions, 9462 flow [2024-06-04 15:38:40,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9206, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9462, PETRI_PLACES=399, PETRI_TRANSITIONS=591} [2024-06-04 15:38:40,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-04 15:38:40,478 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 591 transitions, 9462 flow [2024-06-04 15:38:40,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:40,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:40,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:40,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 15:38:40,478 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 15:38:40,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:40,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1909161913, now seen corresponding path program 1 times [2024-06-04 15:38:40,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:40,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372931018] [2024-06-04 15:38:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:40,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:41,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:41,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372931018] [2024-06-04 15:38:41,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372931018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:41,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:41,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:41,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421413848] [2024-06-04 15:38:41,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:41,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:41,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:41,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:41,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:41,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:41,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 591 transitions, 9462 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:41,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:41,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:41,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:43,386 INFO L124 PetriNetUnfolderBase]: 4492/6715 cut-off events. [2024-06-04 15:38:43,386 INFO L125 PetriNetUnfolderBase]: For 1212018/1212034 co-relation queries the response was YES. [2024-06-04 15:38:43,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70482 conditions, 6715 events. 4492/6715 cut-off events. For 1212018/1212034 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 36830 event pairs, 726 based on Foata normal form. 16/6727 useless extension candidates. Maximal degree in co-relation 70295. Up to 6023 conditions per place. [2024-06-04 15:38:43,488 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 440 selfloop transitions, 192 changer transitions 0/635 dead transitions. [2024-06-04 15:38:43,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 635 transitions, 11754 flow [2024-06-04 15:38:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:38:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:38:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-04 15:38:43,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924611973392461 [2024-06-04 15:38:43,489 INFO L175 Difference]: Start difference. First operand has 399 places, 591 transitions, 9462 flow. Second operand 11 states and 177 transitions. [2024-06-04 15:38:43,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 635 transitions, 11754 flow [2024-06-04 15:38:46,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 635 transitions, 11526 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-04 15:38:46,949 INFO L231 Difference]: Finished difference. Result has 403 places, 605 transitions, 9984 flow [2024-06-04 15:38:46,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9234, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9984, PETRI_PLACES=403, PETRI_TRANSITIONS=605} [2024-06-04 15:38:46,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-04 15:38:46,949 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 605 transitions, 9984 flow [2024-06-04 15:38:46,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:46,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:46,949 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 15:38:46,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 15:38:46,950 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 15:38:46,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:46,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2027249469, now seen corresponding path program 3 times [2024-06-04 15:38:46,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:46,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164885683] [2024-06-04 15:38:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:46,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:47,924 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 15:38:47,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164885683] [2024-06-04 15:38:47,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164885683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:47,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:47,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419831804] [2024-06-04 15:38:47,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:47,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:48,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:48,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 605 transitions, 9984 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:48,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:48,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:48,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:50,021 INFO L124 PetriNetUnfolderBase]: 4817/7248 cut-off events. [2024-06-04 15:38:50,021 INFO L125 PetriNetUnfolderBase]: For 1622816/1622816 co-relation queries the response was YES. [2024-06-04 15:38:50,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75471 conditions, 7248 events. 4817/7248 cut-off events. For 1622816/1622816 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 40238 event pairs, 782 based on Foata normal form. 78/7324 useless extension candidates. Maximal degree in co-relation 75282. Up to 6491 conditions per place. [2024-06-04 15:38:50,141 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 564 selfloop transitions, 76 changer transitions 0/643 dead transitions. [2024-06-04 15:38:50,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 643 transitions, 11838 flow [2024-06-04 15:38:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:38:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:38:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-04 15:38:50,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-04 15:38:50,142 INFO L175 Difference]: Start difference. First operand has 403 places, 605 transitions, 9984 flow. Second operand 10 states and 167 transitions. [2024-06-04 15:38:50,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 643 transitions, 11838 flow [2024-06-04 15:38:54,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 643 transitions, 11486 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-04 15:38:54,354 INFO L231 Difference]: Finished difference. Result has 406 places, 611 transitions, 9966 flow [2024-06-04 15:38:54,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9632, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9966, PETRI_PLACES=406, PETRI_TRANSITIONS=611} [2024-06-04 15:38:54,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-04 15:38:54,355 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 611 transitions, 9966 flow [2024-06-04 15:38:54,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:54,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:54,355 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 15:38:54,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 15:38:54,356 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 15:38:54,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2078077407, now seen corresponding path program 2 times [2024-06-04 15:38:54,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:54,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850175541] [2024-06-04 15:38:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:54,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:55,280 INFO 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 15:38:55,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:55,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850175541] [2024-06-04 15:38:55,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850175541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:55,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:55,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:38:55,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251256921] [2024-06-04 15:38:55,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:55,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:38:55,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:55,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:38:55,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:38:55,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:55,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 611 transitions, 9966 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:38:55,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:55,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:55,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:57,471 INFO L124 PetriNetUnfolderBase]: 5025/7536 cut-off events. [2024-06-04 15:38:57,471 INFO L125 PetriNetUnfolderBase]: For 1405643/1405643 co-relation queries the response was YES. [2024-06-04 15:38:57,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80651 conditions, 7536 events. 5025/7536 cut-off events. For 1405643/1405643 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 41962 event pairs, 828 based on Foata normal form. 8/7542 useless extension candidates. Maximal degree in co-relation 80460. Up to 7027 conditions per place. [2024-06-04 15:38:57,600 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 560 selfloop transitions, 97 changer transitions 0/660 dead transitions. [2024-06-04 15:38:57,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 660 transitions, 12562 flow [2024-06-04 15:38:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:38:57,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:38:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-04 15:38:57,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:38:57,601 INFO L175 Difference]: Start difference. First operand has 406 places, 611 transitions, 9966 flow. Second operand 10 states and 165 transitions. [2024-06-04 15:38:57,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 660 transitions, 12562 flow [2024-06-04 15:39:01,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 660 transitions, 12352 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-04 15:39:01,570 INFO L231 Difference]: Finished difference. Result has 409 places, 632 transitions, 10535 flow [2024-06-04 15:39:01,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9756, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10535, PETRI_PLACES=409, PETRI_TRANSITIONS=632} [2024-06-04 15:39:01,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-04 15:39:01,570 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 632 transitions, 10535 flow [2024-06-04 15:39:01,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:01,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:01,571 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 15:39:01,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 15:39:01,571 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 15:39:01,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2077892833, now seen corresponding path program 1 times [2024-06-04 15:39:01,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:01,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699928843] [2024-06-04 15:39:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:01,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:02,634 INFO 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 15:39:02,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:02,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699928843] [2024-06-04 15:39:02,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699928843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:02,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:02,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:02,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368408041] [2024-06-04 15:39:02,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:02,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:02,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:02,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:02,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 632 transitions, 10535 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:02,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:02,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:02,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:04,639 INFO L124 PetriNetUnfolderBase]: 5033/7548 cut-off events. [2024-06-04 15:39:04,639 INFO L125 PetriNetUnfolderBase]: For 1401046/1401046 co-relation queries the response was YES. [2024-06-04 15:39:04,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81546 conditions, 7548 events. 5033/7548 cut-off events. For 1401046/1401046 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42102 event pairs, 887 based on Foata normal form. 2/7548 useless extension candidates. Maximal degree in co-relation 81353. Up to 7483 conditions per place. [2024-06-04 15:39:04,764 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 618 selfloop transitions, 29 changer transitions 0/650 dead transitions. [2024-06-04 15:39:04,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 650 transitions, 11951 flow [2024-06-04 15:39:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-04 15:39:04,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-04 15:39:04,765 INFO L175 Difference]: Start difference. First operand has 409 places, 632 transitions, 10535 flow. Second operand 8 states and 119 transitions. [2024-06-04 15:39:04,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 650 transitions, 11951 flow [2024-06-04 15:39:08,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 650 transitions, 11674 flow, removed 120 selfloop flow, removed 4 redundant places. [2024-06-04 15:39:08,170 INFO L231 Difference]: Finished difference. Result has 413 places, 634 transitions, 10381 flow [2024-06-04 15:39:08,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10258, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10381, PETRI_PLACES=413, PETRI_TRANSITIONS=634} [2024-06-04 15:39:08,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-04 15:39:08,171 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 634 transitions, 10381 flow [2024-06-04 15:39:08,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:08,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:08,171 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 15:39:08,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 15:39:08,171 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 15:39:08,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:08,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2027254243, now seen corresponding path program 3 times [2024-06-04 15:39:08,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:08,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869981726] [2024-06-04 15:39:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:08,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:09,129 INFO 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 15:39:09,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:09,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869981726] [2024-06-04 15:39:09,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869981726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:09,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:09,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:09,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893034148] [2024-06-04 15:39:09,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:09,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:09,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:09,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:09,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 634 transitions, 10381 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:09,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:09,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:09,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:11,305 INFO L124 PetriNetUnfolderBase]: 5097/7638 cut-off events. [2024-06-04 15:39:11,305 INFO L125 PetriNetUnfolderBase]: For 1465084/1465084 co-relation queries the response was YES. [2024-06-04 15:39:11,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82082 conditions, 7638 events. 5097/7638 cut-off events. For 1465084/1465084 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 42566 event pairs, 861 based on Foata normal form. 8/7644 useless extension candidates. Maximal degree in co-relation 81887. Up to 7220 conditions per place. [2024-06-04 15:39:11,432 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 587 selfloop transitions, 81 changer transitions 0/671 dead transitions. [2024-06-04 15:39:11,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 671 transitions, 12660 flow [2024-06-04 15:39:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:39:11,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:39:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-04 15:39:11,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 15:39:11,433 INFO L175 Difference]: Start difference. First operand has 413 places, 634 transitions, 10381 flow. Second operand 10 states and 164 transitions. [2024-06-04 15:39:11,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 671 transitions, 12660 flow [2024-06-04 15:39:15,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 671 transitions, 12527 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:15,231 INFO L231 Difference]: Finished difference. Result has 418 places, 643 transitions, 10612 flow [2024-06-04 15:39:15,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10248, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10612, PETRI_PLACES=418, PETRI_TRANSITIONS=643} [2024-06-04 15:39:15,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-04 15:39:15,232 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 643 transitions, 10612 flow [2024-06-04 15:39:15,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:15,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:15,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:15,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 15:39:15,232 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 15:39:15,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1616257651, now seen corresponding path program 2 times [2024-06-04 15:39:15,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:15,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346685842] [2024-06-04 15:39:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:15,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:16,289 INFO 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 15:39:16,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:16,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346685842] [2024-06-04 15:39:16,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346685842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:16,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:16,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:16,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810655397] [2024-06-04 15:39:16,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:16,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:16,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:16,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:16,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:16,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:16,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 643 transitions, 10612 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:16,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:16,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:16,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:18,291 INFO L124 PetriNetUnfolderBase]: 5105/7650 cut-off events. [2024-06-04 15:39:18,291 INFO L125 PetriNetUnfolderBase]: For 1457693/1457693 co-relation queries the response was YES. [2024-06-04 15:39:18,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82656 conditions, 7650 events. 5105/7650 cut-off events. For 1457693/1457693 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42675 event pairs, 1066 based on Foata normal form. 2/7650 useless extension candidates. Maximal degree in co-relation 82461. Up to 7612 conditions per place. [2024-06-04 15:39:18,427 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 636 selfloop transitions, 18 changer transitions 0/657 dead transitions. [2024-06-04 15:39:18,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 657 transitions, 12022 flow [2024-06-04 15:39:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-04 15:39:18,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3224932249322493 [2024-06-04 15:39:18,428 INFO L175 Difference]: Start difference. First operand has 418 places, 643 transitions, 10612 flow. Second operand 9 states and 119 transitions. [2024-06-04 15:39:18,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 657 transitions, 12022 flow [2024-06-04 15:39:21,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 657 transitions, 11774 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-04 15:39:21,680 INFO L231 Difference]: Finished difference. Result has 420 places, 645 transitions, 10469 flow [2024-06-04 15:39:21,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10364, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10469, PETRI_PLACES=420, PETRI_TRANSITIONS=645} [2024-06-04 15:39:21,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-04 15:39:21,681 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 645 transitions, 10469 flow [2024-06-04 15:39:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:21,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:21,681 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 15:39:21,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 15:39:21,681 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 15:39:21,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash 688308159, now seen corresponding path program 1 times [2024-06-04 15:39:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:21,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620952966] [2024-06-04 15:39:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:22,770 INFO 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 15:39:22,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:22,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620952966] [2024-06-04 15:39:22,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620952966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:22,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:22,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:22,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045300681] [2024-06-04 15:39:22,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:22,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:22,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:22,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:22,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:22,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 645 transitions, 10469 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:22,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:22,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:22,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:24,922 INFO L124 PetriNetUnfolderBase]: 5099/7642 cut-off events. [2024-06-04 15:39:24,922 INFO L125 PetriNetUnfolderBase]: For 1470890/1470890 co-relation queries the response was YES. [2024-06-04 15:39:25,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82091 conditions, 7642 events. 5099/7642 cut-off events. For 1470890/1470890 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42681 event pairs, 1019 based on Foata normal form. 2/7642 useless extension candidates. Maximal degree in co-relation 81896. Up to 7532 conditions per place. [2024-06-04 15:39:25,059 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 616 selfloop transitions, 46 changer transitions 0/665 dead transitions. [2024-06-04 15:39:25,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 665 transitions, 12230 flow [2024-06-04 15:39:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:39:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:39:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-04 15:39:25,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33414634146341465 [2024-06-04 15:39:25,060 INFO L175 Difference]: Start difference. First operand has 420 places, 645 transitions, 10469 flow. Second operand 10 states and 137 transitions. [2024-06-04 15:39:25,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 665 transitions, 12230 flow [2024-06-04 15:39:28,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 665 transitions, 12072 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-04 15:39:28,555 INFO L231 Difference]: Finished difference. Result has 423 places, 651 transitions, 10628 flow [2024-06-04 15:39:28,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10311, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10628, PETRI_PLACES=423, PETRI_TRANSITIONS=651} [2024-06-04 15:39:28,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-04 15:39:28,556 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 651 transitions, 10628 flow [2024-06-04 15:39:28,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:28,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:28,556 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 15:39:28,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 15:39:28,556 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 15:39:28,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash 688605077, now seen corresponding path program 3 times [2024-06-04 15:39:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:28,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735217489] [2024-06-04 15:39:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:28,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:29,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:29,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735217489] [2024-06-04 15:39:29,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735217489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:29,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:29,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:29,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668104358] [2024-06-04 15:39:29,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:29,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:29,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:29,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:29,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:29,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:29,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 651 transitions, 10628 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:29,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:29,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:29,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:31,901 INFO L124 PetriNetUnfolderBase]: 5107/7654 cut-off events. [2024-06-04 15:39:31,901 INFO L125 PetriNetUnfolderBase]: For 1498541/1498541 co-relation queries the response was YES. [2024-06-04 15:39:31,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82542 conditions, 7654 events. 5107/7654 cut-off events. For 1498541/1498541 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 42626 event pairs, 1027 based on Foata normal form. 2/7654 useless extension candidates. Maximal degree in co-relation 82350. Up to 7611 conditions per place. [2024-06-04 15:39:32,015 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 643 selfloop transitions, 19 changer transitions 0/665 dead transitions. [2024-06-04 15:39:32,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 665 transitions, 12050 flow [2024-06-04 15:39:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-04 15:39:32,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3224932249322493 [2024-06-04 15:39:32,017 INFO L175 Difference]: Start difference. First operand has 423 places, 651 transitions, 10628 flow. Second operand 9 states and 119 transitions. [2024-06-04 15:39:32,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 665 transitions, 12050 flow [2024-06-04 15:39:35,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 665 transitions, 11811 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-04 15:39:35,670 INFO L231 Difference]: Finished difference. Result has 425 places, 653 transitions, 10500 flow [2024-06-04 15:39:35,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10389, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10500, PETRI_PLACES=425, PETRI_TRANSITIONS=653} [2024-06-04 15:39:35,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-04 15:39:35,671 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 653 transitions, 10500 flow [2024-06-04 15:39:35,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:35,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:35,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:35,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 15:39:35,671 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 15:39:35,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2102078693, now seen corresponding path program 4 times [2024-06-04 15:39:35,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:35,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88893139] [2024-06-04 15:39:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:35,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:36,597 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 15:39:36,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:36,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88893139] [2024-06-04 15:39:36,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88893139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:36,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:36,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:36,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687567720] [2024-06-04 15:39:36,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:36,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:36,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:36,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:36,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:36,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:36,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 653 transitions, 10500 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:36,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:36,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:36,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:38,949 INFO L124 PetriNetUnfolderBase]: 5429/8187 cut-off events. [2024-06-04 15:39:38,949 INFO L125 PetriNetUnfolderBase]: For 1968846/1968846 co-relation queries the response was YES. [2024-06-04 15:39:39,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86522 conditions, 8187 events. 5429/8187 cut-off events. For 1968846/1968846 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 46279 event pairs, 948 based on Foata normal form. 78/8263 useless extension candidates. Maximal degree in co-relation 86330. Up to 6656 conditions per place. [2024-06-04 15:39:39,092 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 523 selfloop transitions, 178 changer transitions 0/704 dead transitions. [2024-06-04 15:39:39,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 704 transitions, 12768 flow [2024-06-04 15:39:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-04 15:39:39,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-04 15:39:39,093 INFO L175 Difference]: Start difference. First operand has 425 places, 653 transitions, 10500 flow. Second operand 9 states and 177 transitions. [2024-06-04 15:39:39,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 704 transitions, 12768 flow [2024-06-04 15:39:43,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 704 transitions, 12669 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 15:39:43,526 INFO L231 Difference]: Finished difference. Result has 427 places, 658 transitions, 10942 flow [2024-06-04 15:39:43,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10401, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10942, PETRI_PLACES=427, PETRI_TRANSITIONS=658} [2024-06-04 15:39:43,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-04 15:39:43,527 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 658 transitions, 10942 flow [2024-06-04 15:39:43,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:43,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:43,527 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 15:39:43,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 15:39:43,527 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 15:39:43,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash -351545539, now seen corresponding path program 4 times [2024-06-04 15:39:43,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:43,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650041306] [2024-06-04 15:39:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:43,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:44,643 INFO 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 15:39:44,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:44,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650041306] [2024-06-04 15:39:44,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650041306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:44,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:44,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:44,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678441029] [2024-06-04 15:39:44,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:44,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:44,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:44,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:44,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:44,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:44,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 658 transitions, 10942 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:44,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:44,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:44,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:46,759 INFO L124 PetriNetUnfolderBase]: 5424/8181 cut-off events. [2024-06-04 15:39:46,759 INFO L125 PetriNetUnfolderBase]: For 1552801/1552801 co-relation queries the response was YES. [2024-06-04 15:39:46,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87526 conditions, 8181 events. 5424/8181 cut-off events. For 1552801/1552801 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 46426 event pairs, 1044 based on Foata normal form. 2/8181 useless extension candidates. Maximal degree in co-relation 87333. Up to 8096 conditions per place. [2024-06-04 15:39:46,904 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 634 selfloop transitions, 36 changer transitions 0/673 dead transitions. [2024-06-04 15:39:46,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 673 transitions, 12404 flow [2024-06-04 15:39:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:39:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:39:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-04 15:39:46,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-04 15:39:46,905 INFO L175 Difference]: Start difference. First operand has 427 places, 658 transitions, 10942 flow. Second operand 6 states and 97 transitions. [2024-06-04 15:39:46,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 673 transitions, 12404 flow [2024-06-04 15:39:50,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 673 transitions, 11989 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-04 15:39:51,007 INFO L231 Difference]: Finished difference. Result has 426 places, 660 transitions, 10685 flow [2024-06-04 15:39:51,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10527, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10685, PETRI_PLACES=426, PETRI_TRANSITIONS=660} [2024-06-04 15:39:51,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-04 15:39:51,007 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 660 transitions, 10685 flow [2024-06-04 15:39:51,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:51,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:51,007 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 15:39:51,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 15:39:51,008 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 15:39:51,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:51,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1193031201, now seen corresponding path program 4 times [2024-06-04 15:39:51,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:51,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653334488] [2024-06-04 15:39:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:51,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:52,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653334488] [2024-06-04 15:39:52,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653334488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:52,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:52,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:52,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727889425] [2024-06-04 15:39:52,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:52,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:52,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:52,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:52,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 660 transitions, 10685 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:52,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:52,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:52,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:54,569 INFO L124 PetriNetUnfolderBase]: 5444/8209 cut-off events. [2024-06-04 15:39:54,569 INFO L125 PetriNetUnfolderBase]: For 1581055/1581055 co-relation queries the response was YES. [2024-06-04 15:39:54,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86747 conditions, 8209 events. 5444/8209 cut-off events. For 1581055/1581055 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46565 event pairs, 1030 based on Foata normal form. 4/8211 useless extension candidates. Maximal degree in co-relation 86553. Up to 8054 conditions per place. [2024-06-04 15:39:54,686 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 629 selfloop transitions, 51 changer transitions 0/683 dead transitions. [2024-06-04 15:39:54,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 683 transitions, 12249 flow [2024-06-04 15:39:54,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:39:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:39:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-04 15:39:54,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-04 15:39:54,688 INFO L175 Difference]: Start difference. First operand has 426 places, 660 transitions, 10685 flow. Second operand 9 states and 136 transitions. [2024-06-04 15:39:54,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 683 transitions, 12249 flow [2024-06-04 15:39:58,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 683 transitions, 12117 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-04 15:39:58,545 INFO L231 Difference]: Finished difference. Result has 431 places, 664 transitions, 10783 flow [2024-06-04 15:39:58,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10553, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10783, PETRI_PLACES=431, PETRI_TRANSITIONS=664} [2024-06-04 15:39:58,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-04 15:39:58,545 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 664 transitions, 10783 flow [2024-06-04 15:39:58,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:58,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:58,546 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 15:39:58,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 15:39:58,546 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 15:39:58,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1193208831, now seen corresponding path program 5 times [2024-06-04 15:39:58,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:58,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521541908] [2024-06-04 15:39:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:58,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:59,549 INFO 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 15:39:59,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:59,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521541908] [2024-06-04 15:39:59,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521541908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:59,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:59,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:39:59,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172262911] [2024-06-04 15:39:59,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:59,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:39:59,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:39:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:39:59,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:59,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 664 transitions, 10783 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:39:59,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:59,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:59,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:01,906 INFO L124 PetriNetUnfolderBase]: 5464/8237 cut-off events. [2024-06-04 15:40:01,907 INFO L125 PetriNetUnfolderBase]: For 1550619/1550619 co-relation queries the response was YES. [2024-06-04 15:40:02,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86714 conditions, 8237 events. 5464/8237 cut-off events. For 1550619/1550619 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46623 event pairs, 1197 based on Foata normal form. 4/8239 useless extension candidates. Maximal degree in co-relation 86519. Up to 7848 conditions per place. [2024-06-04 15:40:02,066 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 585 selfloop transitions, 116 changer transitions 0/704 dead transitions. [2024-06-04 15:40:02,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 704 transitions, 13155 flow [2024-06-04 15:40:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:40:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:40:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-04 15:40:02,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-04 15:40:02,067 INFO L175 Difference]: Start difference. First operand has 431 places, 664 transitions, 10783 flow. Second operand 10 states and 171 transitions. [2024-06-04 15:40:02,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 704 transitions, 13155 flow [2024-06-04 15:40:05,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 704 transitions, 13013 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-04 15:40:05,898 INFO L231 Difference]: Finished difference. Result has 436 places, 670 transitions, 11057 flow [2024-06-04 15:40:05,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10641, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11057, PETRI_PLACES=436, PETRI_TRANSITIONS=670} [2024-06-04 15:40:05,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-04 15:40:05,899 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 670 transitions, 11057 flow [2024-06-04 15:40:05,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:05,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:05,899 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 15:40:05,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 15:40:05,899 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 15:40:05,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1765208740, now seen corresponding path program 1 times [2024-06-04 15:40:05,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:05,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928833926] [2024-06-04 15:40:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:05,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:06,858 INFO 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 15:40:06,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:06,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928833926] [2024-06-04 15:40:06,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928833926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:06,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:06,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:06,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934868480] [2024-06-04 15:40:06,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:06,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:06,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:06,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:06,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:06,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:06,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 670 transitions, 11057 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:06,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:06,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:06,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:09,089 INFO L124 PetriNetUnfolderBase]: 5461/8232 cut-off events. [2024-06-04 15:40:09,089 INFO L125 PetriNetUnfolderBase]: For 1552372/1552372 co-relation queries the response was YES. [2024-06-04 15:40:09,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86993 conditions, 8232 events. 5461/8232 cut-off events. For 1552372/1552372 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46629 event pairs, 1120 based on Foata normal form. 1/8231 useless extension candidates. Maximal degree in co-relation 86797. Up to 8007 conditions per place. [2024-06-04 15:40:09,235 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 621 selfloop transitions, 72 changer transitions 0/696 dead transitions. [2024-06-04 15:40:09,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 696 transitions, 12763 flow [2024-06-04 15:40:09,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:40:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:40:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 15:40:09,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-04 15:40:09,237 INFO L175 Difference]: Start difference. First operand has 436 places, 670 transitions, 11057 flow. Second operand 8 states and 133 transitions. [2024-06-04 15:40:09,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 696 transitions, 12763 flow [2024-06-04 15:40:12,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 696 transitions, 12498 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-04 15:40:12,961 INFO L231 Difference]: Finished difference. Result has 438 places, 670 transitions, 10948 flow [2024-06-04 15:40:12,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10792, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10948, PETRI_PLACES=438, PETRI_TRANSITIONS=670} [2024-06-04 15:40:12,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-04 15:40:12,962 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 670 transitions, 10948 flow [2024-06-04 15:40:12,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:12,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:12,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:12,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 15:40:12,963 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 15:40:12,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1510144150, now seen corresponding path program 2 times [2024-06-04 15:40:12,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:12,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047725321] [2024-06-04 15:40:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:12,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:13,843 INFO 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 15:40:13,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:13,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047725321] [2024-06-04 15:40:13,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047725321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:13,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:13,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857057369] [2024-06-04 15:40:13,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:13,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:13,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 670 transitions, 10948 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:13,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:13,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:13,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:16,211 INFO L124 PetriNetUnfolderBase]: 5466/8241 cut-off events. [2024-06-04 15:40:16,211 INFO L125 PetriNetUnfolderBase]: For 1577702/1577702 co-relation queries the response was YES. [2024-06-04 15:40:16,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87130 conditions, 8241 events. 5466/8241 cut-off events. For 1577702/1577702 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46720 event pairs, 1217 based on Foata normal form. 1/8240 useless extension candidates. Maximal degree in co-relation 86932. Up to 8104 conditions per place. [2024-06-04 15:40:16,358 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 642 selfloop transitions, 49 changer transitions 0/694 dead transitions. [2024-06-04 15:40:16,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 694 transitions, 12464 flow [2024-06-04 15:40:16,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:40:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:40:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:40:16,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:40:16,359 INFO L175 Difference]: Start difference. First operand has 438 places, 670 transitions, 10948 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:40:16,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 694 transitions, 12464 flow [2024-06-04 15:40:21,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 694 transitions, 12255 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 15:40:21,033 INFO L231 Difference]: Finished difference. Result has 438 places, 673 transitions, 10909 flow [2024-06-04 15:40:21,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10751, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10909, PETRI_PLACES=438, PETRI_TRANSITIONS=673} [2024-06-04 15:40:21,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-04 15:40:21,033 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 673 transitions, 10909 flow [2024-06-04 15:40:21,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:21,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:21,034 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 15:40:21,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 15:40:21,034 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 15:40:21,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash -828473555, now seen corresponding path program 1 times [2024-06-04 15:40:21,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:21,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592631076] [2024-06-04 15:40:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:21,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:21,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:21,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592631076] [2024-06-04 15:40:21,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592631076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:21,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:21,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:40:21,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560061556] [2024-06-04 15:40:21,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:21,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:40:21,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:21,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:40:21,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:40:21,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:21,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 673 transitions, 10909 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:21,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:21,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:21,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:23,942 INFO L124 PetriNetUnfolderBase]: 5508/8299 cut-off events. [2024-06-04 15:40:23,942 INFO L125 PetriNetUnfolderBase]: For 1607590/1607596 co-relation queries the response was YES. [2024-06-04 15:40:24,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88001 conditions, 8299 events. 5508/8299 cut-off events. For 1607590/1607596 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 47057 event pairs, 1219 based on Foata normal form. 8/8303 useless extension candidates. Maximal degree in co-relation 87803. Up to 8034 conditions per place. [2024-06-04 15:40:24,089 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 635 selfloop transitions, 69 changer transitions 0/707 dead transitions. [2024-06-04 15:40:24,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 707 transitions, 12848 flow [2024-06-04 15:40:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:40:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:40:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 15:40:24,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:40:24,091 INFO L175 Difference]: Start difference. First operand has 438 places, 673 transitions, 10909 flow. Second operand 8 states and 132 transitions. [2024-06-04 15:40:24,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 707 transitions, 12848 flow [2024-06-04 15:40:29,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 707 transitions, 12736 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 15:40:29,187 INFO L231 Difference]: Finished difference. Result has 440 places, 682 transitions, 11177 flow [2024-06-04 15:40:29,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10799, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11177, PETRI_PLACES=440, PETRI_TRANSITIONS=682} [2024-06-04 15:40:29,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-04 15:40:29,189 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 682 transitions, 11177 flow [2024-06-04 15:40:29,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:29,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:29,190 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 15:40:29,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 15:40:29,192 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 15:40:29,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:29,193 INFO L85 PathProgramCache]: Analyzing trace with hash 446327163, now seen corresponding path program 2 times [2024-06-04 15:40:29,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:29,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353173475] [2024-06-04 15:40:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:29,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:29,994 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 15:40:29,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:29,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353173475] [2024-06-04 15:40:29,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353173475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:29,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:29,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:29,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178780642] [2024-06-04 15:40:29,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:29,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:29,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:30,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:30,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 682 transitions, 11177 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:30,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:30,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:30,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:32,400 INFO L124 PetriNetUnfolderBase]: 5518/8311 cut-off events. [2024-06-04 15:40:32,401 INFO L125 PetriNetUnfolderBase]: For 1608955/1608955 co-relation queries the response was YES. [2024-06-04 15:40:32,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88446 conditions, 8311 events. 5518/8311 cut-off events. For 1608955/1608955 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 47134 event pairs, 1202 based on Foata normal form. 2/8311 useless extension candidates. Maximal degree in co-relation 88247. Up to 8111 conditions per place. [2024-06-04 15:40:32,555 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 644 selfloop transitions, 65 changer transitions 0/712 dead transitions. [2024-06-04 15:40:32,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 712 transitions, 12788 flow [2024-06-04 15:40:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 15:40:32,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:40:32,556 INFO L175 Difference]: Start difference. First operand has 440 places, 682 transitions, 11177 flow. Second operand 9 states and 144 transitions. [2024-06-04 15:40:32,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 712 transitions, 12788 flow [2024-06-04 15:40:37,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 712 transitions, 12594 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-04 15:40:37,049 INFO L231 Difference]: Finished difference. Result has 445 places, 685 transitions, 11208 flow [2024-06-04 15:40:37,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11009, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11208, PETRI_PLACES=445, PETRI_TRANSITIONS=685} [2024-06-04 15:40:37,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-04 15:40:37,050 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 685 transitions, 11208 flow [2024-06-04 15:40:37,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:37,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:37,051 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 15:40:37,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 15:40:37,051 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 15:40:37,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:37,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1678247819, now seen corresponding path program 1 times [2024-06-04 15:40:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:37,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821263836] [2024-06-04 15:40:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:37,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:37,807 INFO 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 15:40:37,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:37,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821263836] [2024-06-04 15:40:37,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821263836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:37,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:37,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:37,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203630487] [2024-06-04 15:40:37,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:37,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:37,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:37,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:37,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 685 transitions, 11208 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:37,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:37,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:37,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:40,194 INFO L124 PetriNetUnfolderBase]: 5580/8397 cut-off events. [2024-06-04 15:40:40,194 INFO L125 PetriNetUnfolderBase]: For 1674739/1674739 co-relation queries the response was YES. [2024-06-04 15:40:40,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89882 conditions, 8397 events. 5580/8397 cut-off events. For 1674739/1674739 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47583 event pairs, 1136 based on Foata normal form. 4/8399 useless extension candidates. Maximal degree in co-relation 89681. Up to 7996 conditions per place. [2024-06-04 15:40:40,355 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 619 selfloop transitions, 110 changer transitions 0/732 dead transitions. [2024-06-04 15:40:40,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 732 transitions, 13259 flow [2024-06-04 15:40:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:40:40,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-04 15:40:40,357 INFO L175 Difference]: Start difference. First operand has 445 places, 685 transitions, 11208 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:40:40,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 732 transitions, 13259 flow [2024-06-04 15:40:45,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 732 transitions, 13097 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 15:40:45,467 INFO L231 Difference]: Finished difference. Result has 448 places, 700 transitions, 11536 flow [2024-06-04 15:40:45,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11046, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11536, PETRI_PLACES=448, PETRI_TRANSITIONS=700} [2024-06-04 15:40:45,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-04 15:40:45,468 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 700 transitions, 11536 flow [2024-06-04 15:40:45,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:45,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:45,469 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 15:40:45,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 15:40:45,469 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 15:40:45,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:45,469 INFO L85 PathProgramCache]: Analyzing trace with hash -651222065, now seen corresponding path program 3 times [2024-06-04 15:40:45,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:45,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285671321] [2024-06-04 15:40:45,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:45,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285671321] [2024-06-04 15:40:46,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285671321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:46,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:46,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:46,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884283707] [2024-06-04 15:40:46,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:46,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:46,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:46,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:46,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:46,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 700 transitions, 11536 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:46,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:46,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:46,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:48,679 INFO L124 PetriNetUnfolderBase]: 5590/8412 cut-off events. [2024-06-04 15:40:48,679 INFO L125 PetriNetUnfolderBase]: For 1700396/1700396 co-relation queries the response was YES. [2024-06-04 15:40:48,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91934 conditions, 8412 events. 5590/8412 cut-off events. For 1700396/1700396 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 47677 event pairs, 1209 based on Foata normal form. 2/8412 useless extension candidates. Maximal degree in co-relation 91731. Up to 8271 conditions per place. [2024-06-04 15:40:48,843 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 671 selfloop transitions, 52 changer transitions 0/726 dead transitions. [2024-06-04 15:40:48,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 726 transitions, 13137 flow [2024-06-04 15:40:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-04 15:40:48,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-04 15:40:48,844 INFO L175 Difference]: Start difference. First operand has 448 places, 700 transitions, 11536 flow. Second operand 9 states and 139 transitions. [2024-06-04 15:40:48,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 726 transitions, 13137 flow [2024-06-04 15:40:54,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 726 transitions, 12991 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-04 15:40:54,678 INFO L231 Difference]: Finished difference. Result has 454 places, 703 transitions, 11577 flow [2024-06-04 15:40:54,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11398, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11577, PETRI_PLACES=454, PETRI_TRANSITIONS=703} [2024-06-04 15:40:54,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-04 15:40:54,679 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 703 transitions, 11577 flow [2024-06-04 15:40:54,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:54,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:54,680 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 15:40:54,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 15:40:54,680 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 15:40:54,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:54,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1500879149, now seen corresponding path program 2 times [2024-06-04 15:40:54,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:54,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283253078] [2024-06-04 15:40:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:54,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:55,453 INFO 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 15:40:55,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:55,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283253078] [2024-06-04 15:40:55,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283253078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:55,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:55,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:55,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974079609] [2024-06-04 15:40:55,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:55,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:55,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:55,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:55,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:55,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:55,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 703 transitions, 11577 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:40:55,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:55,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:55,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:57,863 INFO L124 PetriNetUnfolderBase]: 5610/8440 cut-off events. [2024-06-04 15:40:57,863 INFO L125 PetriNetUnfolderBase]: For 1735969/1735969 co-relation queries the response was YES. [2024-06-04 15:40:57,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90756 conditions, 8440 events. 5610/8440 cut-off events. For 1735969/1735969 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 47925 event pairs, 1241 based on Foata normal form. 4/8442 useless extension candidates. Maximal degree in co-relation 90551. Up to 8168 conditions per place. [2024-06-04 15:40:58,021 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 636 selfloop transitions, 94 changer transitions 0/733 dead transitions. [2024-06-04 15:40:58,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 733 transitions, 13219 flow [2024-06-04 15:40:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-04 15:40:58,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-04 15:40:58,022 INFO L175 Difference]: Start difference. First operand has 454 places, 703 transitions, 11577 flow. Second operand 9 states and 146 transitions. [2024-06-04 15:40:58,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 733 transitions, 13219 flow [2024-06-04 15:41:04,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 733 transitions, 13093 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:04,034 INFO L231 Difference]: Finished difference. Result has 457 places, 708 transitions, 11729 flow [2024-06-04 15:41:04,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11451, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11729, PETRI_PLACES=457, PETRI_TRANSITIONS=708} [2024-06-04 15:41:04,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-04 15:41:04,035 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 708 transitions, 11729 flow [2024-06-04 15:41:04,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:41:04,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:04,035 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 15:41:04,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 15:41:04,035 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 15:41:04,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:04,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1501116299, now seen corresponding path program 3 times [2024-06-04 15:41:04,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:04,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582150093] [2024-06-04 15:41:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:04,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:04,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:04,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582150093] [2024-06-04 15:41:04,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582150093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:04,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:04,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:04,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844302041] [2024-06-04 15:41:04,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:04,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:04,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:04,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:04,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:04,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:04,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 708 transitions, 11729 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:41:04,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:04,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:04,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:07,196 INFO L124 PetriNetUnfolderBase]: 5630/8468 cut-off events. [2024-06-04 15:41:07,196 INFO L125 PetriNetUnfolderBase]: For 1766077/1766077 co-relation queries the response was YES. [2024-06-04 15:41:07,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91406 conditions, 8468 events. 5630/8468 cut-off events. For 1766077/1766077 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 48017 event pairs, 1165 based on Foata normal form. 4/8470 useless extension candidates. Maximal degree in co-relation 91200. Up to 8174 conditions per place. [2024-06-04 15:41:07,354 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 636 selfloop transitions, 99 changer transitions 0/738 dead transitions. [2024-06-04 15:41:07,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 738 transitions, 13385 flow [2024-06-04 15:41:07,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 15:41:07,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-04 15:41:07,355 INFO L175 Difference]: Start difference. First operand has 457 places, 708 transitions, 11729 flow. Second operand 9 states and 150 transitions. [2024-06-04 15:41:07,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 738 transitions, 13385 flow [2024-06-04 15:41:12,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 738 transitions, 13146 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:12,264 INFO L231 Difference]: Finished difference. Result has 460 places, 711 transitions, 11766 flow [2024-06-04 15:41:12,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11490, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11766, PETRI_PLACES=460, PETRI_TRANSITIONS=711} [2024-06-04 15:41:12,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-04 15:41:12,265 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 711 transitions, 11766 flow [2024-06-04 15:41:12,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:41:12,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:12,265 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 15:41:12,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 15:41:12,265 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 15:41:12,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1815264785, now seen corresponding path program 1 times [2024-06-04 15:41:12,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:12,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913970045] [2024-06-04 15:41:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:12,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:13,469 INFO 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 15:41:13,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:13,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913970045] [2024-06-04 15:41:13,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913970045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:13,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:13,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:41:13,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897861744] [2024-06-04 15:41:13,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:13,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:41:13,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:13,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:41:13,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:41:13,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:13,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 711 transitions, 11766 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 15:41:13,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:13,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:13,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:16,084 INFO L124 PetriNetUnfolderBase]: 5704/8583 cut-off events. [2024-06-04 15:41:16,084 INFO L125 PetriNetUnfolderBase]: For 1877933/1877933 co-relation queries the response was YES. [2024-06-04 15:41:16,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93499 conditions, 8583 events. 5704/8583 cut-off events. For 1877933/1877933 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 48814 event pairs, 1082 based on Foata normal form. 8/8589 useless extension candidates. Maximal degree in co-relation 93292. Up to 8048 conditions per place. [2024-06-04 15:41:16,241 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 661 selfloop transitions, 87 changer transitions 0/751 dead transitions. [2024-06-04 15:41:16,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 751 transitions, 13786 flow [2024-06-04 15:41:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:41:16,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-04 15:41:16,242 INFO L175 Difference]: Start difference. First operand has 460 places, 711 transitions, 11766 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:41:16,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 751 transitions, 13786 flow [2024-06-04 15:41:21,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 751 transitions, 13538 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 15:41:21,798 INFO L231 Difference]: Finished difference. Result has 462 places, 713 transitions, 11762 flow [2024-06-04 15:41:21,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11518, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11762, PETRI_PLACES=462, PETRI_TRANSITIONS=713} [2024-06-04 15:41:21,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-04 15:41:21,798 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 713 transitions, 11762 flow [2024-06-04 15:41:21,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 15:41:21,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:21,799 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 15:41:21,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 15:41:21,799 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 15:41:21,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1039306675, now seen corresponding path program 2 times [2024-06-04 15:41:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:21,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487278176] [2024-06-04 15:41:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:21,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:22,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:22,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487278176] [2024-06-04 15:41:22,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487278176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:22,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:22,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:41:22,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554898363] [2024-06-04 15:41:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:22,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:41:22,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:41:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:41:22,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:22,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 713 transitions, 11762 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 15:41:22,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:22,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:22,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:25,859 INFO L124 PetriNetUnfolderBase]: 5804/8735 cut-off events. [2024-06-04 15:41:25,859 INFO L125 PetriNetUnfolderBase]: For 1996180/1996180 co-relation queries the response was YES. [2024-06-04 15:41:25,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96469 conditions, 8735 events. 5804/8735 cut-off events. For 1996180/1996180 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49966 event pairs, 1272 based on Foata normal form. 8/8741 useless extension candidates. Maximal degree in co-relation 96261. Up to 8358 conditions per place. [2024-06-04 15:41:26,020 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 663 selfloop transitions, 85 changer transitions 0/751 dead transitions. [2024-06-04 15:41:26,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 751 transitions, 13788 flow [2024-06-04 15:41:26,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:41:26,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-04 15:41:26,021 INFO L175 Difference]: Start difference. First operand has 462 places, 713 transitions, 11762 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:41:26,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 751 transitions, 13788 flow [2024-06-04 15:41:31,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 751 transitions, 13666 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 15:41:31,888 INFO L231 Difference]: Finished difference. Result has 466 places, 715 transitions, 11884 flow [2024-06-04 15:41:31,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11644, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11884, PETRI_PLACES=466, PETRI_TRANSITIONS=715} [2024-06-04 15:41:31,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-04 15:41:31,889 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 715 transitions, 11884 flow [2024-06-04 15:41:31,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 15:41:31,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:31,889 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 15:41:31,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 15:41:31,889 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 15:41:31,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:31,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1039315975, now seen corresponding path program 3 times [2024-06-04 15:41:31,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:31,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918249925] [2024-06-04 15:41:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:31,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:32,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:32,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918249925] [2024-06-04 15:41:32,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918249925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:32,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:32,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:41:32,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676866625] [2024-06-04 15:41:32,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:32,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:41:32,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:41:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:41:33,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:33,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 715 transitions, 11884 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 15:41:33,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:33,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:33,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:35,648 INFO L124 PetriNetUnfolderBase]: 5776/8695 cut-off events. [2024-06-04 15:41:35,648 INFO L125 PetriNetUnfolderBase]: For 1971667/1971667 co-relation queries the response was YES. [2024-06-04 15:41:35,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95071 conditions, 8695 events. 5776/8695 cut-off events. For 1971667/1971667 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49676 event pairs, 1210 based on Foata normal form. 12/8705 useless extension candidates. Maximal degree in co-relation 94861. Up to 8384 conditions per place. [2024-06-04 15:41:35,819 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 659 selfloop transitions, 84 changer transitions 0/746 dead transitions. [2024-06-04 15:41:35,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 746 transitions, 13554 flow [2024-06-04 15:41:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 15:41:35,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-04 15:41:35,820 INFO L175 Difference]: Start difference. First operand has 466 places, 715 transitions, 11884 flow. Second operand 9 states and 150 transitions. [2024-06-04 15:41:35,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 746 transitions, 13554 flow [2024-06-04 15:41:41,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 746 transitions, 13423 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 15:41:41,680 INFO L231 Difference]: Finished difference. Result has 470 places, 715 transitions, 11926 flow [2024-06-04 15:41:41,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11753, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11926, PETRI_PLACES=470, PETRI_TRANSITIONS=715} [2024-06-04 15:41:41,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-04 15:41:41,681 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 715 transitions, 11926 flow [2024-06-04 15:41:41,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 15:41:41,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:41,682 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 15:41:41,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 15:41:41,682 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 15:41:41,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1895658295, now seen corresponding path program 4 times [2024-06-04 15:41:41,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:41,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759133727] [2024-06-04 15:41:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:41,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:42,426 INFO 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 15:41:42,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:42,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759133727] [2024-06-04 15:41:42,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759133727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:42,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:42,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:42,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338539240] [2024-06-04 15:41:42,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:42,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:42,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:42,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:42,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:42,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:42,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 715 transitions, 11926 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:42,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:42,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:42,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:45,034 INFO L124 PetriNetUnfolderBase]: 5866/8820 cut-off events. [2024-06-04 15:41:45,035 INFO L125 PetriNetUnfolderBase]: For 2004892/2004894 co-relation queries the response was YES. [2024-06-04 15:41:45,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97729 conditions, 8820 events. 5866/8820 cut-off events. For 2004892/2004894 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 50455 event pairs, 1119 based on Foata normal form. 4/8819 useless extension candidates. Maximal degree in co-relation 97517. Up to 7622 conditions per place. [2024-06-04 15:41:45,190 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 533 selfloop transitions, 227 changer transitions 0/763 dead transitions. [2024-06-04 15:41:45,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 763 transitions, 14790 flow [2024-06-04 15:41:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:41:45,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-04 15:41:45,191 INFO L175 Difference]: Start difference. First operand has 470 places, 715 transitions, 11926 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:41:45,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 763 transitions, 14790 flow [2024-06-04 15:41:51,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 763 transitions, 14617 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 15:41:51,129 INFO L231 Difference]: Finished difference. Result has 472 places, 736 transitions, 12845 flow [2024-06-04 15:41:51,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11753, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12845, PETRI_PLACES=472, PETRI_TRANSITIONS=736} [2024-06-04 15:41:51,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-04 15:41:51,130 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 736 transitions, 12845 flow [2024-06-04 15:41:51,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:51,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:51,130 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 15:41:51,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 15:41:51,131 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 15:41:51,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:51,131 INFO L85 PathProgramCache]: Analyzing trace with hash -274613677, now seen corresponding path program 4 times [2024-06-04 15:41:51,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:51,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397992120] [2024-06-04 15:41:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:51,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:52,062 INFO 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 15:41:52,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:52,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397992120] [2024-06-04 15:41:52,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397992120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:52,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:52,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:52,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786801713] [2024-06-04 15:41:52,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:52,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:52,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:52,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:52,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:52,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 736 transitions, 12845 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:41:52,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:52,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:52,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:55,432 INFO L124 PetriNetUnfolderBase]: 5942/8922 cut-off events. [2024-06-04 15:41:55,432 INFO L125 PetriNetUnfolderBase]: For 2107748/2107748 co-relation queries the response was YES. [2024-06-04 15:41:55,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101251 conditions, 8922 events. 5942/8922 cut-off events. For 2107748/2107748 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 51001 event pairs, 1202 based on Foata normal form. 4/8924 useless extension candidates. Maximal degree in co-relation 101036. Up to 8178 conditions per place. [2024-06-04 15:41:55,701 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 611 selfloop transitions, 165 changer transitions 0/779 dead transitions. [2024-06-04 15:41:55,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 779 transitions, 15351 flow [2024-06-04 15:41:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:41:55,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-04 15:41:55,702 INFO L175 Difference]: Start difference. First operand has 472 places, 736 transitions, 12845 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:41:55,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 779 transitions, 15351 flow [2024-06-04 15:42:01,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 779 transitions, 15154 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-04 15:42:01,165 INFO L231 Difference]: Finished difference. Result has 480 places, 746 transitions, 13425 flow [2024-06-04 15:42:01,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12648, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13425, PETRI_PLACES=480, PETRI_TRANSITIONS=746} [2024-06-04 15:42:01,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-04 15:42:01,166 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 746 transitions, 13425 flow [2024-06-04 15:42:01,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:42:01,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:01,167 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 15:42:01,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 15:42:01,167 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 15:42:01,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:01,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1895778265, now seen corresponding path program 5 times [2024-06-04 15:42:01,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:01,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789797414] [2024-06-04 15:42:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:01,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:02,069 INFO 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 15:42:02,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789797414] [2024-06-04 15:42:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789797414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:02,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:02,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:02,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116391836] [2024-06-04 15:42:02,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:02,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:02,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:02,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:02,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:02,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:02,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 746 transitions, 13425 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:42:02,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:02,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:02,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:05,497 INFO L124 PetriNetUnfolderBase]: 5952/8936 cut-off events. [2024-06-04 15:42:05,497 INFO L125 PetriNetUnfolderBase]: For 2133248/2133248 co-relation queries the response was YES. [2024-06-04 15:42:05,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102738 conditions, 8936 events. 5952/8936 cut-off events. For 2133248/2133248 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 51108 event pairs, 1231 based on Foata normal form. 2/8936 useless extension candidates. Maximal degree in co-relation 102520. Up to 8624 conditions per place. [2024-06-04 15:42:05,658 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 675 selfloop transitions, 98 changer transitions 0/776 dead transitions. [2024-06-04 15:42:05,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 776 transitions, 15386 flow [2024-06-04 15:42:05,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-04 15:42:05,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-04 15:42:05,660 INFO L175 Difference]: Start difference. First operand has 480 places, 746 transitions, 13425 flow. Second operand 9 states and 145 transitions. [2024-06-04 15:42:05,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 776 transitions, 15386 flow [2024-06-04 15:42:11,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 776 transitions, 15145 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-04 15:42:11,362 INFO L231 Difference]: Finished difference. Result has 485 places, 749 transitions, 13461 flow [2024-06-04 15:42:11,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13184, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13461, PETRI_PLACES=485, PETRI_TRANSITIONS=749} [2024-06-04 15:42:11,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-04 15:42:11,362 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 749 transitions, 13461 flow [2024-06-04 15:42:11,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:42:11,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:11,363 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 15:42:11,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 15:42:11,363 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 15:42:11,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:11,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1901020675, now seen corresponding path program 6 times [2024-06-04 15:42:11,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:11,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484729402] [2024-06-04 15:42:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:11,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:12,135 INFO 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 15:42:12,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484729402] [2024-06-04 15:42:12,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484729402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:12,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:12,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:42:12,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429442914] [2024-06-04 15:42:12,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:12,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:42:12,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:12,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:42:12,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:42:12,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:12,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 749 transitions, 13461 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:12,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:12,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:12,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:15,443 INFO L124 PetriNetUnfolderBase]: 5972/8967 cut-off events. [2024-06-04 15:42:15,443 INFO L125 PetriNetUnfolderBase]: For 2172660/2172662 co-relation queries the response was YES. [2024-06-04 15:42:15,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102646 conditions, 8967 events. 5972/8967 cut-off events. For 2172660/2172662 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 51336 event pairs, 1181 based on Foata normal form. 6/8968 useless extension candidates. Maximal degree in co-relation 102426. Up to 7749 conditions per place. [2024-06-04 15:42:15,601 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 538 selfloop transitions, 239 changer transitions 0/780 dead transitions. [2024-06-04 15:42:15,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 780 transitions, 15971 flow [2024-06-04 15:42:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:42:15,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-04 15:42:15,602 INFO L175 Difference]: Start difference. First operand has 485 places, 749 transitions, 13461 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:42:15,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 780 transitions, 15971 flow [2024-06-04 15:42:22,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 780 transitions, 15731 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 15:42:22,445 INFO L231 Difference]: Finished difference. Result has 486 places, 753 transitions, 13802 flow [2024-06-04 15:42:22,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13221, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13802, PETRI_PLACES=486, PETRI_TRANSITIONS=753} [2024-06-04 15:42:22,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-04 15:42:22,446 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 753 transitions, 13802 flow [2024-06-04 15:42:22,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:22,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:22,446 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 15:42:22,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 15:42:22,446 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 15:42:22,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1537461625, now seen corresponding path program 7 times [2024-06-04 15:42:22,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:22,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788841763] [2024-06-04 15:42:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:22,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:23,189 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 15:42:23,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:23,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788841763] [2024-06-04 15:42:23,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788841763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:23,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:23,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:42:23,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474475404] [2024-06-04 15:42:23,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:23,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:42:23,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:23,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:42:23,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:42:23,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:23,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 753 transitions, 13802 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:23,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:23,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:23,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:26,431 INFO L124 PetriNetUnfolderBase]: 6016/9029 cut-off events. [2024-06-04 15:42:26,432 INFO L125 PetriNetUnfolderBase]: For 2233263/2233277 co-relation queries the response was YES. [2024-06-04 15:42:26,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104626 conditions, 9029 events. 6016/9029 cut-off events. For 2233263/2233277 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51680 event pairs, 1183 based on Foata normal form. 9/9032 useless extension candidates. Maximal degree in co-relation 104405. Up to 7786 conditions per place. [2024-06-04 15:42:26,774 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 545 selfloop transitions, 237 changer transitions 0/785 dead transitions. [2024-06-04 15:42:26,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 785 transitions, 16433 flow [2024-06-04 15:42:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:42:26,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-04 15:42:26,777 INFO L175 Difference]: Start difference. First operand has 486 places, 753 transitions, 13802 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:42:26,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 785 transitions, 16433 flow [2024-06-04 15:42:33,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 785 transitions, 15760 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:33,782 INFO L231 Difference]: Finished difference. Result has 488 places, 760 transitions, 13793 flow [2024-06-04 15:42:33,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13155, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13793, PETRI_PLACES=488, PETRI_TRANSITIONS=760} [2024-06-04 15:42:33,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-04 15:42:33,783 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 760 transitions, 13793 flow [2024-06-04 15:42:33,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:33,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:33,783 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 15:42:33,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 15:42:33,783 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 15:42:33,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:33,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1541175301, now seen corresponding path program 5 times [2024-06-04 15:42:33,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:33,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999651263] [2024-06-04 15:42:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:34,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:34,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999651263] [2024-06-04 15:42:34,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999651263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:34,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:34,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276910337] [2024-06-04 15:42:34,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:34,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:34,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:34,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:34,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 760 transitions, 13793 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:42:34,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:34,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:34,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:37,788 INFO L124 PetriNetUnfolderBase]: 6084/9119 cut-off events. [2024-06-04 15:42:37,788 INFO L125 PetriNetUnfolderBase]: For 2307602/2307602 co-relation queries the response was YES. [2024-06-04 15:42:37,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106257 conditions, 9119 events. 6084/9119 cut-off events. For 2307602/2307602 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 52200 event pairs, 1186 based on Foata normal form. 4/9121 useless extension candidates. Maximal degree in co-relation 106035. Up to 8336 conditions per place. [2024-06-04 15:42:37,969 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 629 selfloop transitions, 169 changer transitions 0/801 dead transitions. [2024-06-04 15:42:37,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 801 transitions, 16474 flow [2024-06-04 15:42:37,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:42:37,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-04 15:42:37,970 INFO L175 Difference]: Start difference. First operand has 488 places, 760 transitions, 13793 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:42:37,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 801 transitions, 16474 flow [2024-06-04 15:42:44,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 801 transitions, 16064 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-04 15:42:44,642 INFO L231 Difference]: Finished difference. Result has 493 places, 769 transitions, 13922 flow [2024-06-04 15:42:44,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13383, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13922, PETRI_PLACES=493, PETRI_TRANSITIONS=769} [2024-06-04 15:42:44,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-04 15:42:44,642 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 769 transitions, 13922 flow [2024-06-04 15:42:44,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:42:44,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:44,642 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 15:42:44,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 15:42:44,643 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 15:42:44,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash 408868599, now seen corresponding path program 8 times [2024-06-04 15:42:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:44,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146248314] [2024-06-04 15:42:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:45,450 INFO 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 15:42:45,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:45,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146248314] [2024-06-04 15:42:45,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146248314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:45,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:45,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000329961] [2024-06-04 15:42:45,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:45,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:45,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:45,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:45,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:45,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:45,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 769 transitions, 13922 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:42:45,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:45,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:45,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:48,776 INFO L124 PetriNetUnfolderBase]: 6158/9221 cut-off events. [2024-06-04 15:42:48,776 INFO L125 PetriNetUnfolderBase]: For 2389107/2389107 co-relation queries the response was YES. [2024-06-04 15:42:48,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108229 conditions, 9221 events. 6158/9221 cut-off events. For 2389107/2389107 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 52778 event pairs, 1218 based on Foata normal form. 2/9221 useless extension candidates. Maximal degree in co-relation 108006. Up to 8835 conditions per place. [2024-06-04 15:42:48,937 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 694 selfloop transitions, 116 changer transitions 0/813 dead transitions. [2024-06-04 15:42:48,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 813 transitions, 16734 flow [2024-06-04 15:42:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:42:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:42:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-04 15:42:48,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37915742793791574 [2024-06-04 15:42:48,939 INFO L175 Difference]: Start difference. First operand has 493 places, 769 transitions, 13922 flow. Second operand 11 states and 171 transitions. [2024-06-04 15:42:48,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 813 transitions, 16734 flow [2024-06-04 15:42:56,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 813 transitions, 16464 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-04 15:42:56,575 INFO L231 Difference]: Finished difference. Result has 502 places, 782 transitions, 14242 flow [2024-06-04 15:42:56,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13652, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14242, PETRI_PLACES=502, PETRI_TRANSITIONS=782} [2024-06-04 15:42:56,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-04 15:42:56,576 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 782 transitions, 14242 flow [2024-06-04 15:42:56,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:42:56,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:56,577 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 15:42:56,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 15:42:56,577 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 15:42:56,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:56,577 INFO L85 PathProgramCache]: Analyzing trace with hash 408879945, now seen corresponding path program 6 times [2024-06-04 15:42:56,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:56,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638232127] [2024-06-04 15:42:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:56,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:57,404 INFO 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 15:42:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638232127] [2024-06-04 15:42:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638232127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:57,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621827711] [2024-06-04 15:42:57,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:57,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:57,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:57,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:57,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 782 transitions, 14242 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:42:57,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:57,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:57,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:00,636 INFO L124 PetriNetUnfolderBase]: 6146/9205 cut-off events. [2024-06-04 15:43:00,636 INFO L125 PetriNetUnfolderBase]: For 2413667/2413667 co-relation queries the response was YES. [2024-06-04 15:43:00,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107718 conditions, 9205 events. 6146/9205 cut-off events. For 2413667/2413667 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 52701 event pairs, 1199 based on Foata normal form. 4/9207 useless extension candidates. Maximal degree in co-relation 107492. Up to 8430 conditions per place. [2024-06-04 15:43:00,793 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 637 selfloop transitions, 172 changer transitions 0/812 dead transitions. [2024-06-04 15:43:00,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 812 transitions, 16500 flow [2024-06-04 15:43:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:00,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 15:43:00,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-04 15:43:00,794 INFO L175 Difference]: Start difference. First operand has 502 places, 782 transitions, 14242 flow. Second operand 9 states and 152 transitions. [2024-06-04 15:43:00,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 812 transitions, 16500 flow [2024-06-04 15:43:08,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 812 transitions, 16162 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-04 15:43:08,963 INFO L231 Difference]: Finished difference. Result has 504 places, 782 transitions, 14254 flow [2024-06-04 15:43:08,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13904, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14254, PETRI_PLACES=504, PETRI_TRANSITIONS=782} [2024-06-04 15:43:08,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-04 15:43:08,964 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 782 transitions, 14254 flow [2024-06-04 15:43:08,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:43:08,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:08,965 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 15:43:08,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 15:43:08,965 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 15:43:08,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:08,966 INFO L85 PathProgramCache]: Analyzing trace with hash 408874396, now seen corresponding path program 1 times [2024-06-04 15:43:08,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:08,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940798343] [2024-06-04 15:43:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:08,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:10,122 INFO 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 15:43:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940798343] [2024-06-04 15:43:10,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940798343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:10,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:10,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:43:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244162982] [2024-06-04 15:43:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:43:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:43:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:43:10,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:43:10,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 782 transitions, 14254 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:43:10,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:10,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:43:10,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:13,477 INFO L124 PetriNetUnfolderBase]: 6143/9202 cut-off events. [2024-06-04 15:43:13,477 INFO L125 PetriNetUnfolderBase]: For 2417029/2417029 co-relation queries the response was YES. [2024-06-04 15:43:13,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107822 conditions, 9202 events. 6143/9202 cut-off events. For 2417029/2417029 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 52710 event pairs, 1325 based on Foata normal form. 1/9201 useless extension candidates. Maximal degree in co-relation 107595. Up to 9116 conditions per place. [2024-06-04 15:43:13,632 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 759 selfloop transitions, 39 changer transitions 0/801 dead transitions. [2024-06-04 15:43:13,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 801 transitions, 15916 flow [2024-06-04 15:43:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-04 15:43:13,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-04 15:43:13,633 INFO L175 Difference]: Start difference. First operand has 504 places, 782 transitions, 14254 flow. Second operand 9 states and 133 transitions. [2024-06-04 15:43:13,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 801 transitions, 15916 flow [2024-06-04 15:43:20,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 801 transitions, 15677 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:20,966 INFO L231 Difference]: Finished difference. Result has 507 places, 782 transitions, 14099 flow [2024-06-04 15:43:20,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14015, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14099, PETRI_PLACES=507, PETRI_TRANSITIONS=782} [2024-06-04 15:43:20,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-04 15:43:20,967 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 782 transitions, 14099 flow [2024-06-04 15:43:20,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:43:20,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:20,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:20,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 15:43:20,967 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 15:43:20,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:20,967 INFO L85 PathProgramCache]: Analyzing trace with hash 408880131, now seen corresponding path program 1 times [2024-06-04 15:43:20,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:20,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534249058] [2024-06-04 15:43:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:20,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:21,957 INFO 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 15:43:21,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:21,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534249058] [2024-06-04 15:43:21,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534249058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:21,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:21,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:43:21,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500579212] [2024-06-04 15:43:21,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:21,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:43:21,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:43:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:43:22,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:43:22,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 782 transitions, 14099 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 15:43:22,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:22,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:43:22,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:25,373 INFO L124 PetriNetUnfolderBase]: 6153/9216 cut-off events. [2024-06-04 15:43:25,374 INFO L125 PetriNetUnfolderBase]: For 2458912/2458912 co-relation queries the response was YES. [2024-06-04 15:43:25,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107778 conditions, 9216 events. 6153/9216 cut-off events. For 2458912/2458912 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 52824 event pairs, 1332 based on Foata normal form. 2/9216 useless extension candidates. Maximal degree in co-relation 107550. Up to 9080 conditions per place. [2024-06-04 15:43:25,536 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 743 selfloop transitions, 61 changer transitions 0/807 dead transitions. [2024-06-04 15:43:25,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 807 transitions, 15883 flow [2024-06-04 15:43:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-04 15:43:25,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-04 15:43:25,537 INFO L175 Difference]: Start difference. First operand has 507 places, 782 transitions, 14099 flow. Second operand 9 states and 139 transitions. [2024-06-04 15:43:25,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 807 transitions, 15883 flow