./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.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/safe021_power.opt_pso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe021_power.opt_pso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe021_power.opt_pso.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-76401ed-m [2024-06-20 17:18:44,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:18:44,367 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:18:44,374 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:18:44,375 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:18:44,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:18:44,405 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:18:44,406 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:18:44,406 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:18:44,410 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:18:44,410 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:18:44,410 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:18:44,411 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:18:44,412 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:18:44,412 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:18:44,413 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:18:44,413 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:18:44,413 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:18:44,414 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:18:44,414 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:18:44,414 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:18:44,415 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:18:44,415 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:18:44,415 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:18:44,415 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:18:44,416 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:18:44,416 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:18:44,416 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:18:44,417 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:18:44,417 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:18:44,418 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:18:44,418 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:18:44,418 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:18:44,419 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:18:44,419 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:18:44,419 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:18:44,419 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:18:44,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:18:44,420 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:18:44,420 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:18:44,420 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:18:44,420 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:18:44,421 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:18:44,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:18:44,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:18:44,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:18:44,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:18:44,719 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:18:44,720 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:18:44,721 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe021_power.opt_pso.opt.yml/witness.yml [2024-06-20 17:18:44,923 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:18:44,923 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:18:44,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-20 17:18:46,078 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:18:46,337 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:18:46,338 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-20 17:18:46,352 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2afea6eee/380f37e0c7454d929e0eff915ec1dd17/FLAG81a182bbd [2024-06-20 17:18:46,364 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2afea6eee/380f37e0c7454d929e0eff915ec1dd17 [2024-06-20 17:18:46,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:18:46,366 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:18:46,367 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:18:46,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:18:46,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:18:46,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:18:44" (1/2) ... [2024-06-20 17:18:46,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1209d841 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:18:46, skipping insertion in model container [2024-06-20 17:18:46,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:18:44" (1/2) ... [2024-06-20 17:18:46,375 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1be5a8b9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:18:46, skipping insertion in model container [2024-06-20 17:18:46,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:18:46" (2/2) ... [2024-06-20 17:18:46,375 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1209d841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:46, skipping insertion in model container [2024-06-20 17:18:46,375 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:18:46" (2/2) ... [2024-06-20 17:18:46,376 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:18:46,469 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:18:46,470 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! 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$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$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$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$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$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-20 17:18:46,471 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((((! multithreaded || x$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 <= 1) && (y == 0 || y == 1)))) && (! 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 <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! 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 <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-20 17:18:46,471 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$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$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$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$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 <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-20 17:18:46,471 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:18:46,471 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-20 17:18:46,517 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:18:46,880 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:18:46,891 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:18:47,055 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:18:47,097 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:18:47,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47 WrapperNode [2024-06-20 17:18:47,097 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:18:47,099 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:18:47,100 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:18:47,100 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:18:47,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,133 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,178 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-20 17:18:47,179 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:18:47,179 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:18:47,179 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:18:47,180 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:18:47,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,194 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,209 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]. [2024-06-20 17:18:47,210 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,210 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,223 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,228 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:18:47,229 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:18:47,229 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:18:47,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:18:47,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (1/1) ... [2024-06-20 17:18:47,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:18:47,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:18:47,255 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) [2024-06-20 17:18:47,266 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 [2024-06-20 17:18:47,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:18:47,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:18:47,302 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:18:47,302 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:18:47,303 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:18:47,303 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:18:47,303 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:18:47,303 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:18:47,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:18:47,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:18:47,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:18:47,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:18:47,309 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:18:47,493 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:18:47,495 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:18:47,931 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:18:47,932 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:18:48,114 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:18:48,114 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:18:48,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:18:48 BoogieIcfgContainer [2024-06-20 17:18:48,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:18:48,118 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:18:48,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:18:48,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:18:48,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:18:44" (1/4) ... [2024-06-20 17:18:48,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237ef4ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:18:48, skipping insertion in model container [2024-06-20 17:18:48,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:18:46" (2/4) ... [2024-06-20 17:18:48,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237ef4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:18:48, skipping insertion in model container [2024-06-20 17:18:48,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:18:47" (3/4) ... [2024-06-20 17:18:48,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237ef4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:18:48, skipping insertion in model container [2024-06-20 17:18:48,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:18:48" (4/4) ... [2024-06-20 17:18:48,125 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_power.opt_pso.opt.i [2024-06-20 17:18:48,142 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:18:48,143 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:18:48,143 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:18:48,196 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:18:48,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 17:18:48,271 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 17:18:48,272 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:18:48,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:18:48,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 17:18:48,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 17:18:48,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:18:48,302 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;@68e2addf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:18:48,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:18:48,307 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:18:48,307 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:18:48,307 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:18:48,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:48,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:18:48,309 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)] === [2024-06-20 17:18:48,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:48,321 INFO L85 PathProgramCache]: Analyzing trace with hash 372110564, now seen corresponding path program 1 times [2024-06-20 17:18:48,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:48,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667686650] [2024-06-20 17:18:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:48,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:49,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667686650] [2024-06-20 17:18:49,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667686650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:49,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:49,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:18:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962051448] [2024-06-20 17:18:49,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:49,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:18:49,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:49,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:18:49,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:18:49,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 17:18:49,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:49,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:49,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 17:18:49,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:50,002 INFO L124 PetriNetUnfolderBase]: 1152/1755 cut-off events. [2024-06-20 17:18:50,003 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-20 17:18:50,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1755 events. 1152/1755 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8178 event pairs, 794 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-20 17:18:50,017 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 17:18:50,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 171 flow [2024-06-20 17:18:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:18:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:18:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-20 17:18:50,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 17:18:50,030 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-20 17:18:50,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 171 flow [2024-06-20 17:18:50,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:50,035 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 17:18:50,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 17:18:50,039 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 17:18:50,039 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 17:18:50,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:50,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:50,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:50,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:18:50,040 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)] === [2024-06-20 17:18:50,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:50,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1117077401, now seen corresponding path program 1 times [2024-06-20 17:18:50,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:50,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336956555] [2024-06-20 17:18:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:50,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:50,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:50,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336956555] [2024-06-20 17:18:50,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336956555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:50,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:50,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:18:50,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598657697] [2024-06-20 17:18:50,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:50,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:18:50,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:50,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:18:50,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:18:50,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 17:18:50,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:50,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:50,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 17:18:50,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:51,234 INFO L124 PetriNetUnfolderBase]: 1395/2101 cut-off events. [2024-06-20 17:18:51,234 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2024-06-20 17:18:51,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4853 conditions, 2101 events. 1395/2101 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9517 event pairs, 862 based on Foata normal form. 3/2102 useless extension candidates. Maximal degree in co-relation 4841. Up to 2073 conditions per place. [2024-06-20 17:18:51,248 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-20 17:18:51,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 252 flow [2024-06-20 17:18:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:18:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:18:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-20 17:18:51,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-20 17:18:51,253 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 89 transitions. [2024-06-20 17:18:51,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 252 flow [2024-06-20 17:18:51,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:18:51,256 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-20 17:18:51,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-20 17:18:51,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-20 17:18:51,257 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-20 17:18:51,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:51,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:51,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:51,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:18:51,262 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)] === [2024-06-20 17:18:51,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:51,263 INFO L85 PathProgramCache]: Analyzing trace with hash 269662507, now seen corresponding path program 1 times [2024-06-20 17:18:51,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:51,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929447760] [2024-06-20 17:18:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:51,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:52,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:52,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929447760] [2024-06-20 17:18:52,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929447760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:52,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:52,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:18:52,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548152678] [2024-06-20 17:18:52,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:52,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:18:52,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:52,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:18:52,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:18:52,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 17:18:52,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:52,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:52,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 17:18:52,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:52,473 INFO L124 PetriNetUnfolderBase]: 1383/2083 cut-off events. [2024-06-20 17:18:52,474 INFO L125 PetriNetUnfolderBase]: For 1050/1058 co-relation queries the response was YES. [2024-06-20 17:18:52,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5360 conditions, 2083 events. 1383/2083 cut-off events. For 1050/1058 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9484 event pairs, 612 based on Foata normal form. 12/2093 useless extension candidates. Maximal degree in co-relation 5345. Up to 2025 conditions per place. [2024-06-20 17:18:52,487 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-20 17:18:52,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 338 flow [2024-06-20 17:18:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:18:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:18:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-20 17:18:52,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 17:18:52,490 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 110 transitions. [2024-06-20 17:18:52,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 338 flow [2024-06-20 17:18:52,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 336 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 17:18:52,493 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 196 flow [2024-06-20 17:18:52,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-20 17:18:52,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-20 17:18:52,494 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 196 flow [2024-06-20 17:18:52,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:52,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:52,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:52,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:18:52,495 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)] === [2024-06-20 17:18:52,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:52,496 INFO L85 PathProgramCache]: Analyzing trace with hash -265907840, now seen corresponding path program 1 times [2024-06-20 17:18:52,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:52,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90790819] [2024-06-20 17:18:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:52,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:53,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90790819] [2024-06-20 17:18:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90790819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:53,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:18:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299509933] [2024-06-20 17:18:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:53,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:18:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:18:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:18:53,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 17:18:53,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:53,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:53,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 17:18:53,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:54,292 INFO L124 PetriNetUnfolderBase]: 1374/2068 cut-off events. [2024-06-20 17:18:54,293 INFO L125 PetriNetUnfolderBase]: For 1915/1923 co-relation queries the response was YES. [2024-06-20 17:18:54,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5859 conditions, 2068 events. 1374/2068 cut-off events. For 1915/1923 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9324 event pairs, 472 based on Foata normal form. 12/2078 useless extension candidates. Maximal degree in co-relation 5841. Up to 1980 conditions per place. [2024-06-20 17:18:54,307 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 54 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-20 17:18:54,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 402 flow [2024-06-20 17:18:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:18:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:18:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-20 17:18:54,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-20 17:18:54,311 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 196 flow. Second operand 6 states and 126 transitions. [2024-06-20 17:18:54,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 402 flow [2024-06-20 17:18:54,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 380 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:54,318 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 215 flow [2024-06-20 17:18:54,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-20 17:18:54,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-20 17:18:54,319 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 215 flow [2024-06-20 17:18:54,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:54,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:54,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:54,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:18:54,320 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)] === [2024-06-20 17:18:54,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1195026544, now seen corresponding path program 1 times [2024-06-20 17:18:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:54,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475107156] [2024-06-20 17:18:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:55,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475107156] [2024-06-20 17:18:55,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475107156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:55,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:55,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:18:55,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299306776] [2024-06-20 17:18:55,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:55,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:18:55,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:18:55,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:18:55,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 17:18:55,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:55,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:55,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 17:18:55,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:55,661 INFO L124 PetriNetUnfolderBase]: 1245/1901 cut-off events. [2024-06-20 17:18:55,661 INFO L125 PetriNetUnfolderBase]: For 2916/2940 co-relation queries the response was YES. [2024-06-20 17:18:55,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 1901 events. 1245/1901 cut-off events. For 2916/2940 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8786 event pairs, 585 based on Foata normal form. 4/1836 useless extension candidates. Maximal degree in co-relation 5660. Up to 1826 conditions per place. [2024-06-20 17:18:55,672 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 43 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-20 17:18:55,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 375 flow [2024-06-20 17:18:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:18:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:18:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 17:18:55,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 17:18:55,674 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 215 flow. Second operand 5 states and 90 transitions. [2024-06-20 17:18:55,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 375 flow [2024-06-20 17:18:55,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 344 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 17:18:55,677 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 255 flow [2024-06-20 17:18:55,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-20 17:18:55,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-20 17:18:55,678 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 255 flow [2024-06-20 17:18:55,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:55,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:55,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:55,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:18:55,679 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)] === [2024-06-20 17:18:55,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1608883590, now seen corresponding path program 1 times [2024-06-20 17:18:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:55,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007676631] [2024-06-20 17:18:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:55,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:56,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:56,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007676631] [2024-06-20 17:18:56,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007676631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:56,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:56,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:18:56,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816937357] [2024-06-20 17:18:56,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:56,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:18:56,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:18:56,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:18:56,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:18:56,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 255 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) [2024-06-20 17:18:56,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:56,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:18:56,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:57,118 INFO L124 PetriNetUnfolderBase]: 1476/2247 cut-off events. [2024-06-20 17:18:57,118 INFO L125 PetriNetUnfolderBase]: For 4593/4613 co-relation queries the response was YES. [2024-06-20 17:18:57,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7246 conditions, 2247 events. 1476/2247 cut-off events. For 4593/4613 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10538 event pairs, 721 based on Foata normal form. 2/2214 useless extension candidates. Maximal degree in co-relation 7223. Up to 2148 conditions per place. [2024-06-20 17:18:57,136 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 55 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-20 17:18:57,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 473 flow [2024-06-20 17:18:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:18:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:18:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-20 17:18:57,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:18:57,142 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 255 flow. Second operand 6 states and 100 transitions. [2024-06-20 17:18:57,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 473 flow [2024-06-20 17:18:57,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 455 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 17:18:57,148 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 337 flow [2024-06-20 17:18:57,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-20 17:18:57,150 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-20 17:18:57,151 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 337 flow [2024-06-20 17:18:57,151 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) [2024-06-20 17:18:57,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:57,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:57,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:18:57,152 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)] === [2024-06-20 17:18:57,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:57,152 INFO L85 PathProgramCache]: Analyzing trace with hash -611616827, now seen corresponding path program 1 times [2024-06-20 17:18:57,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:57,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715141275] [2024-06-20 17:18:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:57,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:58,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:58,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715141275] [2024-06-20 17:18:58,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715141275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:58,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:58,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:18:58,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027164115] [2024-06-20 17:18:58,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:58,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:18:58,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:58,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:18:58,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:18:58,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:18:58,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 337 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) [2024-06-20 17:18:58,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:58,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:18:58,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:58,637 INFO L124 PetriNetUnfolderBase]: 1530/2300 cut-off events. [2024-06-20 17:18:58,637 INFO L125 PetriNetUnfolderBase]: For 5830/5860 co-relation queries the response was YES. [2024-06-20 17:18:58,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 2300 events. 1530/2300 cut-off events. For 5830/5860 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10466 event pairs, 699 based on Foata normal form. 14/2304 useless extension candidates. Maximal degree in co-relation 8084. Up to 2251 conditions per place. [2024-06-20 17:18:58,657 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-06-20 17:18:58,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 545 flow [2024-06-20 17:18:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:18:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:18:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 17:18:58,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-20 17:18:58,658 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 337 flow. Second operand 6 states and 103 transitions. [2024-06-20 17:18:58,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 545 flow [2024-06-20 17:18:58,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 539 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-20 17:18:58,666 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 387 flow [2024-06-20 17:18:58,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-20 17:18:58,667 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-20 17:18:58,667 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 387 flow [2024-06-20 17:18:58,667 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) [2024-06-20 17:18:58,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:58,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:58,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:18:58,668 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)] === [2024-06-20 17:18:58,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:58,668 INFO L85 PathProgramCache]: Analyzing trace with hash -639115067, now seen corresponding path program 2 times [2024-06-20 17:18:58,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:58,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25660444] [2024-06-20 17:18:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:58,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:59,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:59,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25660444] [2024-06-20 17:18:59,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25660444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:59,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:59,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:18:59,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17727843] [2024-06-20 17:18:59,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:59,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:18:59,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:59,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:18:59,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:18:59,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:18:59,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 387 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) [2024-06-20 17:18:59,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:59,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:18:59,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:00,111 INFO L124 PetriNetUnfolderBase]: 1554/2337 cut-off events. [2024-06-20 17:19:00,111 INFO L125 PetriNetUnfolderBase]: For 7850/7895 co-relation queries the response was YES. [2024-06-20 17:19:00,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8910 conditions, 2337 events. 1554/2337 cut-off events. For 7850/7895 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10665 event pairs, 702 based on Foata normal form. 15/2341 useless extension candidates. Maximal degree in co-relation 8880. Up to 2264 conditions per place. [2024-06-20 17:19:00,126 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-20 17:19:00,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 621 flow [2024-06-20 17:19:00,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:19:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:19:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 17:19:00,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:19:00,128 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 387 flow. Second operand 6 states and 102 transitions. [2024-06-20 17:19:00,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 621 flow [2024-06-20 17:19:00,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 589 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:00,135 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 467 flow [2024-06-20 17:19:00,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-20 17:19:00,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-20 17:19:00,136 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 467 flow [2024-06-20 17:19:00,137 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) [2024-06-20 17:19:00,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:00,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:00,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:19:00,137 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)] === [2024-06-20 17:19:00,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:00,137 INFO L85 PathProgramCache]: Analyzing trace with hash -639107131, now seen corresponding path program 1 times [2024-06-20 17:19:00,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:00,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043622363] [2024-06-20 17:19:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:00,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:01,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:01,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043622363] [2024-06-20 17:19:01,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043622363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:01,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:01,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:01,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006447916] [2024-06-20 17:19:01,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:01,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:01,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:01,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:01,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:01,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:01,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:01,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:01,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:01,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:01,855 INFO L124 PetriNetUnfolderBase]: 1538/2323 cut-off events. [2024-06-20 17:19:01,855 INFO L125 PetriNetUnfolderBase]: For 10438/10488 co-relation queries the response was YES. [2024-06-20 17:19:01,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9194 conditions, 2323 events. 1538/2323 cut-off events. For 10438/10488 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10936 event pairs, 706 based on Foata normal form. 2/2284 useless extension candidates. Maximal degree in co-relation 9162. Up to 2214 conditions per place. [2024-06-20 17:19:01,873 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 65 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-20 17:19:01,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 687 flow [2024-06-20 17:19:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 17:19:01,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:19:01,874 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 467 flow. Second operand 7 states and 115 transitions. [2024-06-20 17:19:01,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 687 flow [2024-06-20 17:19:01,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 90 transitions, 643 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:01,882 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 479 flow [2024-06-20 17:19:01,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-06-20 17:19:01,883 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-20 17:19:01,883 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 479 flow [2024-06-20 17:19:01,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:01,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:01,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:01,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:19:01,883 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)] === [2024-06-20 17:19:01,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash -163566649, now seen corresponding path program 1 times [2024-06-20 17:19:01,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:01,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322342420] [2024-06-20 17:19:01,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:01,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:02,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:02,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322342420] [2024-06-20 17:19:02,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322342420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:02,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:02,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:02,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486021150] [2024-06-20 17:19:02,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:02,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:02,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:02,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:02,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:02,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 479 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:02,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:02,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:02,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:03,446 INFO L124 PetriNetUnfolderBase]: 1546/2328 cut-off events. [2024-06-20 17:19:03,446 INFO L125 PetriNetUnfolderBase]: For 12530/12569 co-relation queries the response was YES. [2024-06-20 17:19:03,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9840 conditions, 2328 events. 1546/2328 cut-off events. For 12530/12569 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10781 event pairs, 553 based on Foata normal form. 29/2309 useless extension candidates. Maximal degree in co-relation 9807. Up to 2202 conditions per place. [2024-06-20 17:19:03,463 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 76 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2024-06-20 17:19:03,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 767 flow [2024-06-20 17:19:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:19:03,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-20 17:19:03,466 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 479 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:19:03,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 767 flow [2024-06-20 17:19:03,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 735 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:03,474 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 537 flow [2024-06-20 17:19:03,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=537, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-20 17:19:03,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-20 17:19:03,475 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 537 flow [2024-06-20 17:19:03,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:03,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:03,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:03,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:19:03,476 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)] === [2024-06-20 17:19:03,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:03,476 INFO L85 PathProgramCache]: Analyzing trace with hash -57745435, now seen corresponding path program 1 times [2024-06-20 17:19:03,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:03,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380381193] [2024-06-20 17:19:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:03,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:04,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:04,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380381193] [2024-06-20 17:19:04,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380381193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:04,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:04,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:04,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856925844] [2024-06-20 17:19:04,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:04,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:04,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:04,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 537 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:04,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:04,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:04,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:04,964 INFO L124 PetriNetUnfolderBase]: 1644/2456 cut-off events. [2024-06-20 17:19:04,965 INFO L125 PetriNetUnfolderBase]: For 14091/14091 co-relation queries the response was YES. [2024-06-20 17:19:04,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10884 conditions, 2456 events. 1644/2456 cut-off events. For 14091/14091 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11081 event pairs, 602 based on Foata normal form. 2/2457 useless extension candidates. Maximal degree in co-relation 10849. Up to 2411 conditions per place. [2024-06-20 17:19:04,982 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 14 changer transitions 0/108 dead transitions. [2024-06-20 17:19:04,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 867 flow [2024-06-20 17:19:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:19:04,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:19:04,984 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 537 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:19:04,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 867 flow [2024-06-20 17:19:04,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 108 transitions, 829 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:04,994 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 621 flow [2024-06-20 17:19:04,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=621, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-20 17:19:04,995 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-20 17:19:04,995 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 621 flow [2024-06-20 17:19:04,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:04,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:04,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:04,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:19:04,996 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)] === [2024-06-20 17:19:04,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:04,997 INFO L85 PathProgramCache]: Analyzing trace with hash -163446679, now seen corresponding path program 2 times [2024-06-20 17:19:04,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:04,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072565533] [2024-06-20 17:19:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:04,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:05,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:05,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072565533] [2024-06-20 17:19:05,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072565533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:05,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:05,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:05,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330661656] [2024-06-20 17:19:05,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:05,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:05,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:05,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:05,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 621 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:05,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:05,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:05,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:06,516 INFO L124 PetriNetUnfolderBase]: 1598/2409 cut-off events. [2024-06-20 17:19:06,516 INFO L125 PetriNetUnfolderBase]: For 18777/18824 co-relation queries the response was YES. [2024-06-20 17:19:06,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11428 conditions, 2409 events. 1598/2409 cut-off events. For 18777/18824 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11120 event pairs, 531 based on Foata normal form. 30/2396 useless extension candidates. Maximal degree in co-relation 11390. Up to 2225 conditions per place. [2024-06-20 17:19:06,536 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 29 changer transitions 0/118 dead transitions. [2024-06-20 17:19:06,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 118 transitions, 1003 flow [2024-06-20 17:19:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:19:06,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 17:19:06,538 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 621 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:19:06,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 118 transitions, 1003 flow [2024-06-20 17:19:06,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 977 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-20 17:19:06,555 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 724 flow [2024-06-20 17:19:06,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-06-20 17:19:06,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-20 17:19:06,556 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 724 flow [2024-06-20 17:19:06,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:06,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:06,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:06,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:19:06,557 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)] === [2024-06-20 17:19:06,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1662507343, now seen corresponding path program 2 times [2024-06-20 17:19:06,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:06,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937965383] [2024-06-20 17:19:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:07,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:07,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937965383] [2024-06-20 17:19:07,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937965383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:07,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:07,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:07,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74426440] [2024-06-20 17:19:07,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:07,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:07,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:07,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:07,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:07,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:07,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 724 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:07,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:07,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:07,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:08,019 INFO L124 PetriNetUnfolderBase]: 1711/2554 cut-off events. [2024-06-20 17:19:08,020 INFO L125 PetriNetUnfolderBase]: For 21504/21518 co-relation queries the response was YES. [2024-06-20 17:19:08,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12552 conditions, 2554 events. 1711/2554 cut-off events. For 21504/21518 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11589 event pairs, 605 based on Foata normal form. 12/2564 useless extension candidates. Maximal degree in co-relation 12512. Up to 2460 conditions per place. [2024-06-20 17:19:08,044 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 92 selfloop transitions, 27 changer transitions 0/122 dead transitions. [2024-06-20 17:19:08,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 1128 flow [2024-06-20 17:19:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 17:19:08,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-20 17:19:08,046 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 724 flow. Second operand 7 states and 114 transitions. [2024-06-20 17:19:08,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 1128 flow [2024-06-20 17:19:08,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 122 transitions, 1088 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:08,063 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 832 flow [2024-06-20 17:19:08,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=832, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-06-20 17:19:08,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-20 17:19:08,065 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 832 flow [2024-06-20 17:19:08,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:08,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:08,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:08,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:19:08,066 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)] === [2024-06-20 17:19:08,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1662270193, now seen corresponding path program 3 times [2024-06-20 17:19:08,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:08,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129659419] [2024-06-20 17:19:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:08,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:08,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:08,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129659419] [2024-06-20 17:19:08,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129659419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:08,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:08,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:08,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900818794] [2024-06-20 17:19:08,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:08,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:08,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:08,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:08,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:09,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:09,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 832 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:09,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:09,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:09,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:09,461 INFO L124 PetriNetUnfolderBase]: 1706/2547 cut-off events. [2024-06-20 17:19:09,462 INFO L125 PetriNetUnfolderBase]: For 24659/24673 co-relation queries the response was YES. [2024-06-20 17:19:09,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13089 conditions, 2547 events. 1706/2547 cut-off events. For 24659/24673 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11561 event pairs, 605 based on Foata normal form. 12/2557 useless extension candidates. Maximal degree in co-relation 13046. Up to 2455 conditions per place. [2024-06-20 17:19:09,484 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 26 changer transitions 0/120 dead transitions. [2024-06-20 17:19:09,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 120 transitions, 1114 flow [2024-06-20 17:19:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 17:19:09,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-20 17:19:09,486 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 832 flow. Second operand 7 states and 113 transitions. [2024-06-20 17:19:09,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 120 transitions, 1114 flow [2024-06-20 17:19:09,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 120 transitions, 1074 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 17:19:09,511 INFO L231 Difference]: Finished difference. Result has 96 places, 101 transitions, 852 flow [2024-06-20 17:19:09,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=852, PETRI_PLACES=96, PETRI_TRANSITIONS=101} [2024-06-20 17:19:09,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-20 17:19:09,512 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 101 transitions, 852 flow [2024-06-20 17:19:09,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:09,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:09,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:09,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:19:09,513 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)] === [2024-06-20 17:19:09,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:09,514 INFO L85 PathProgramCache]: Analyzing trace with hash -51316531, now seen corresponding path program 3 times [2024-06-20 17:19:09,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:09,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437862500] [2024-06-20 17:19:09,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:09,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:10,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:10,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437862500] [2024-06-20 17:19:10,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437862500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:10,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:10,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:10,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107271607] [2024-06-20 17:19:10,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:10,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:10,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:10,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:10,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:10,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 101 transitions, 852 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:10,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:10,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:10,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:10,918 INFO L124 PetriNetUnfolderBase]: 1614/2438 cut-off events. [2024-06-20 17:19:10,918 INFO L125 PetriNetUnfolderBase]: For 28824/28881 co-relation queries the response was YES. [2024-06-20 17:19:10,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12886 conditions, 2438 events. 1614/2438 cut-off events. For 28824/28881 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11244 event pairs, 557 based on Foata normal form. 23/2407 useless extension candidates. Maximal degree in co-relation 12841. Up to 2192 conditions per place. [2024-06-20 17:19:10,939 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 75 selfloop transitions, 38 changer transitions 0/127 dead transitions. [2024-06-20 17:19:10,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 127 transitions, 1228 flow [2024-06-20 17:19:10,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 17:19:10,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 17:19:10,941 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 852 flow. Second operand 7 states and 124 transitions. [2024-06-20 17:19:10,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 127 transitions, 1228 flow [2024-06-20 17:19:10,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 127 transitions, 1144 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:10,967 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 893 flow [2024-06-20 17:19:10,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=893, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2024-06-20 17:19:10,968 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-20 17:19:10,968 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 893 flow [2024-06-20 17:19:10,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:10,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:10,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:10,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:19:10,969 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)] === [2024-06-20 17:19:10,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash -51070267, now seen corresponding path program 1 times [2024-06-20 17:19:10,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:10,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911502081] [2024-06-20 17:19:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:10,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:12,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:12,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911502081] [2024-06-20 17:19:12,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911502081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:12,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:12,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:12,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995428748] [2024-06-20 17:19:12,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:12,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:12,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:12,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:12,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 893 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:12,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:12,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:12,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:12,775 INFO L124 PetriNetUnfolderBase]: 1623/2448 cut-off events. [2024-06-20 17:19:12,775 INFO L125 PetriNetUnfolderBase]: For 31301/31415 co-relation queries the response was YES. [2024-06-20 17:19:12,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13146 conditions, 2448 events. 1623/2448 cut-off events. For 31301/31415 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11461 event pairs, 538 based on Foata normal form. 4/2417 useless extension candidates. Maximal degree in co-relation 13102. Up to 2308 conditions per place. [2024-06-20 17:19:12,791 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-20 17:19:12,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 130 transitions, 1197 flow [2024-06-20 17:19:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:19:12,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-20 17:19:12,794 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 893 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:19:12,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 130 transitions, 1197 flow [2024-06-20 17:19:12,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 1098 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:12,826 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 853 flow [2024-06-20 17:19:12,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=853, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2024-06-20 17:19:12,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-20 17:19:12,829 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 853 flow [2024-06-20 17:19:12,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:12,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:12,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:12,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:19:12,834 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)] === [2024-06-20 17:19:12,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:12,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1504236366, now seen corresponding path program 1 times [2024-06-20 17:19:12,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:12,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202699951] [2024-06-20 17:19:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:12,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202699951] [2024-06-20 17:19:13,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202699951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:13,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:13,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839731449] [2024-06-20 17:19:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:13,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:13,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:13,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:13,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:13,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 853 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:13,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:13,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:13,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:14,524 INFO L124 PetriNetUnfolderBase]: 1586/2389 cut-off events. [2024-06-20 17:19:14,524 INFO L125 PetriNetUnfolderBase]: For 33015/33079 co-relation queries the response was YES. [2024-06-20 17:19:14,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13063 conditions, 2389 events. 1586/2389 cut-off events. For 33015/33079 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10922 event pairs, 534 based on Foata normal form. 33/2395 useless extension candidates. Maximal degree in co-relation 13018. Up to 2233 conditions per place. [2024-06-20 17:19:14,536 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 94 selfloop transitions, 23 changer transitions 0/132 dead transitions. [2024-06-20 17:19:14,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 132 transitions, 1155 flow [2024-06-20 17:19:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:19:14,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-20 17:19:14,538 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 853 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:19:14,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 132 transitions, 1155 flow [2024-06-20 17:19:14,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 132 transitions, 1104 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:14,564 INFO L231 Difference]: Finished difference. Result has 100 places, 106 transitions, 860 flow [2024-06-20 17:19:14,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=100, PETRI_TRANSITIONS=106} [2024-06-20 17:19:14,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-20 17:19:14,565 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 106 transitions, 860 flow [2024-06-20 17:19:14,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:14,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:14,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:14,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:19:14,565 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)] === [2024-06-20 17:19:14,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:14,566 INFO L85 PathProgramCache]: Analyzing trace with hash -775598033, now seen corresponding path program 1 times [2024-06-20 17:19:14,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:14,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460944912] [2024-06-20 17:19:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:14,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:15,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460944912] [2024-06-20 17:19:15,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460944912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:15,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:15,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238334822] [2024-06-20 17:19:15,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:15,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:15,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:15,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 106 transitions, 860 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:15,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:15,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:15,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:16,007 INFO L124 PetriNetUnfolderBase]: 1696/2532 cut-off events. [2024-06-20 17:19:16,008 INFO L125 PetriNetUnfolderBase]: For 35024/35024 co-relation queries the response was YES. [2024-06-20 17:19:16,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13823 conditions, 2532 events. 1696/2532 cut-off events. For 35024/35024 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11395 event pairs, 554 based on Foata normal form. 4/2535 useless extension candidates. Maximal degree in co-relation 13777. Up to 2434 conditions per place. [2024-06-20 17:19:16,022 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 126 selfloop transitions, 20 changer transitions 0/149 dead transitions. [2024-06-20 17:19:16,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 149 transitions, 1338 flow [2024-06-20 17:19:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:19:16,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 17:19:16,024 INFO L175 Difference]: Start difference. First operand has 100 places, 106 transitions, 860 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:19:16,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 149 transitions, 1338 flow [2024-06-20 17:19:16,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 149 transitions, 1269 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:16,054 INFO L231 Difference]: Finished difference. Result has 105 places, 118 transitions, 977 flow [2024-06-20 17:19:16,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=105, PETRI_TRANSITIONS=118} [2024-06-20 17:19:16,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-20 17:19:16,055 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 118 transitions, 977 flow [2024-06-20 17:19:16,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:16,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:16,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:16,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:19:16,055 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)] === [2024-06-20 17:19:16,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:16,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1508051381, now seen corresponding path program 2 times [2024-06-20 17:19:16,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:16,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445462790] [2024-06-20 17:19:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:16,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:16,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:16,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445462790] [2024-06-20 17:19:16,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445462790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:16,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:16,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:16,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455515061] [2024-06-20 17:19:16,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:16,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:16,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:16,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:16,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:16,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:16,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 118 transitions, 977 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:16,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:16,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:16,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:17,494 INFO L124 PetriNetUnfolderBase]: 1826/2721 cut-off events. [2024-06-20 17:19:17,494 INFO L125 PetriNetUnfolderBase]: For 42144/42144 co-relation queries the response was YES. [2024-06-20 17:19:17,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15411 conditions, 2721 events. 1826/2721 cut-off events. For 42144/42144 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12332 event pairs, 483 based on Foata normal form. 8/2728 useless extension candidates. Maximal degree in co-relation 15361. Up to 2440 conditions per place. [2024-06-20 17:19:17,511 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 126 selfloop transitions, 34 changer transitions 0/163 dead transitions. [2024-06-20 17:19:17,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 163 transitions, 1569 flow [2024-06-20 17:19:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:19:17,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-20 17:19:17,514 INFO L175 Difference]: Start difference. First operand has 105 places, 118 transitions, 977 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:19:17,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 163 transitions, 1569 flow [2024-06-20 17:19:17,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 163 transitions, 1527 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 17:19:17,547 INFO L231 Difference]: Finished difference. Result has 113 places, 131 transitions, 1165 flow [2024-06-20 17:19:17,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1165, PETRI_PLACES=113, PETRI_TRANSITIONS=131} [2024-06-20 17:19:17,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-20 17:19:17,547 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 131 transitions, 1165 flow [2024-06-20 17:19:17,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:17,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:17,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:17,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:19:17,548 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)] === [2024-06-20 17:19:17,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:17,549 INFO L85 PathProgramCache]: Analyzing trace with hash -771873166, now seen corresponding path program 1 times [2024-06-20 17:19:17,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:17,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947409811] [2024-06-20 17:19:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:17,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:18,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:18,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947409811] [2024-06-20 17:19:18,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947409811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:18,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:18,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:18,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110668671] [2024-06-20 17:19:18,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:18,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:18,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:18,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:18,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:18,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:18,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 131 transitions, 1165 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:18,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:18,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:18,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:19,283 INFO L124 PetriNetUnfolderBase]: 1811/2700 cut-off events. [2024-06-20 17:19:19,283 INFO L125 PetriNetUnfolderBase]: For 46997/46997 co-relation queries the response was YES. [2024-06-20 17:19:19,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16279 conditions, 2700 events. 1811/2700 cut-off events. For 46997/46997 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12234 event pairs, 483 based on Foata normal form. 6/2705 useless extension candidates. Maximal degree in co-relation 16225. Up to 2447 conditions per place. [2024-06-20 17:19:19,299 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 127 selfloop transitions, 37 changer transitions 0/167 dead transitions. [2024-06-20 17:19:19,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 167 transitions, 1719 flow [2024-06-20 17:19:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:19:19,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:19:19,301 INFO L175 Difference]: Start difference. First operand has 113 places, 131 transitions, 1165 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:19:19,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 167 transitions, 1719 flow [2024-06-20 17:19:19,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 167 transitions, 1649 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:19,336 INFO L231 Difference]: Finished difference. Result has 119 places, 136 transitions, 1270 flow [2024-06-20 17:19:19,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1270, PETRI_PLACES=119, PETRI_TRANSITIONS=136} [2024-06-20 17:19:19,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-20 17:19:19,337 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 136 transitions, 1270 flow [2024-06-20 17:19:19,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:19,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:19,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:19,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:19:19,338 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)] === [2024-06-20 17:19:19,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1790113461, now seen corresponding path program 3 times [2024-06-20 17:19:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:19,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515196445] [2024-06-20 17:19:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:20,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:20,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515196445] [2024-06-20 17:19:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515196445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:20,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:20,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:20,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116844922] [2024-06-20 17:19:20,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:20,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:20,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:20,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:20,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:20,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:20,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 136 transitions, 1270 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:20,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:20,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:20,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:20,860 INFO L124 PetriNetUnfolderBase]: 1814/2704 cut-off events. [2024-06-20 17:19:20,860 INFO L125 PetriNetUnfolderBase]: For 50522/50522 co-relation queries the response was YES. [2024-06-20 17:19:20,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16725 conditions, 2704 events. 1814/2704 cut-off events. For 50522/50522 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12200 event pairs, 502 based on Foata normal form. 4/2707 useless extension candidates. Maximal degree in co-relation 16668. Up to 2432 conditions per place. [2024-06-20 17:19:20,875 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 128 selfloop transitions, 40 changer transitions 0/171 dead transitions. [2024-06-20 17:19:20,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 171 transitions, 1827 flow [2024-06-20 17:19:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:19:20,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 17:19:20,877 INFO L175 Difference]: Start difference. First operand has 119 places, 136 transitions, 1270 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:19:20,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 171 transitions, 1827 flow [2024-06-20 17:19:20,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 171 transitions, 1744 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:20,916 INFO L231 Difference]: Finished difference. Result has 122 places, 140 transitions, 1336 flow [2024-06-20 17:19:20,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1336, PETRI_PLACES=122, PETRI_TRANSITIONS=140} [2024-06-20 17:19:20,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-20 17:19:20,917 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 140 transitions, 1336 flow [2024-06-20 17:19:20,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:20,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:20,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:20,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:19:20,917 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)] === [2024-06-20 17:19:20,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:20,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1583187314, now seen corresponding path program 2 times [2024-06-20 17:19:20,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:20,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376040668] [2024-06-20 17:19:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:20,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:21,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:21,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376040668] [2024-06-20 17:19:21,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376040668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:21,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:21,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:21,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597276731] [2024-06-20 17:19:21,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:21,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:21,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:21,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:21,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:21,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:21,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 140 transitions, 1336 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:21,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:21,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:21,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:22,433 INFO L124 PetriNetUnfolderBase]: 1857/2771 cut-off events. [2024-06-20 17:19:22,433 INFO L125 PetriNetUnfolderBase]: For 56273/56284 co-relation queries the response was YES. [2024-06-20 17:19:22,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17292 conditions, 2771 events. 1857/2771 cut-off events. For 56273/56284 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12596 event pairs, 500 based on Foata normal form. 6/2774 useless extension candidates. Maximal degree in co-relation 17234. Up to 2343 conditions per place. [2024-06-20 17:19:22,452 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 114 selfloop transitions, 66 changer transitions 0/183 dead transitions. [2024-06-20 17:19:22,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 183 transitions, 2072 flow [2024-06-20 17:19:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:19:22,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-20 17:19:22,454 INFO L175 Difference]: Start difference. First operand has 122 places, 140 transitions, 1336 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:19:22,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 183 transitions, 2072 flow [2024-06-20 17:19:22,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 183 transitions, 1999 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:22,503 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 1599 flow [2024-06-20 17:19:22,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1599, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-06-20 17:19:22,504 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-20 17:19:22,504 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 1599 flow [2024-06-20 17:19:22,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:22,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:22,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:22,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:19:22,505 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)] === [2024-06-20 17:19:22,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:22,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1583454441, now seen corresponding path program 4 times [2024-06-20 17:19:22,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:22,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862114602] [2024-06-20 17:19:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:22,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:23,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:23,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862114602] [2024-06-20 17:19:23,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862114602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:23,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:23,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:23,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630336262] [2024-06-20 17:19:23,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:23,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:23,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:23,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:23,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:23,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:23,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 1599 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:23,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:23,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:23,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:23,862 INFO L124 PetriNetUnfolderBase]: 1955/2914 cut-off events. [2024-06-20 17:19:23,862 INFO L125 PetriNetUnfolderBase]: For 66862/66873 co-relation queries the response was YES. [2024-06-20 17:19:23,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19272 conditions, 2914 events. 1955/2914 cut-off events. For 66862/66873 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13299 event pairs, 504 based on Foata normal form. 12/2923 useless extension candidates. Maximal degree in co-relation 19211. Up to 2367 conditions per place. [2024-06-20 17:19:23,882 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 121 selfloop transitions, 73 changer transitions 0/197 dead transitions. [2024-06-20 17:19:23,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 197 transitions, 2416 flow [2024-06-20 17:19:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:19:23,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-20 17:19:23,884 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 1599 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:19:23,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 197 transitions, 2416 flow [2024-06-20 17:19:23,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 197 transitions, 2358 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-20 17:19:23,939 INFO L231 Difference]: Finished difference. Result has 135 places, 166 transitions, 1893 flow [2024-06-20 17:19:23,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1893, PETRI_PLACES=135, PETRI_TRANSITIONS=166} [2024-06-20 17:19:23,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-20 17:19:23,939 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 166 transitions, 1893 flow [2024-06-20 17:19:23,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:23,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:23,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:23,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:19:23,940 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)] === [2024-06-20 17:19:23,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1590811671, now seen corresponding path program 5 times [2024-06-20 17:19:23,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:23,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894045423] [2024-06-20 17:19:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:23,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:24,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:24,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894045423] [2024-06-20 17:19:24,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894045423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:24,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:24,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:24,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635936730] [2024-06-20 17:19:24,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:24,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:24,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:24,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:24,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:24,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:24,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 166 transitions, 1893 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:24,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:24,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:24,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:25,395 INFO L124 PetriNetUnfolderBase]: 1977/2946 cut-off events. [2024-06-20 17:19:25,395 INFO L125 PetriNetUnfolderBase]: For 72953/72964 co-relation queries the response was YES. [2024-06-20 17:19:25,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20321 conditions, 2946 events. 1977/2946 cut-off events. For 72953/72964 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13490 event pairs, 509 based on Foata normal form. 8/2951 useless extension candidates. Maximal degree in co-relation 20257. Up to 2376 conditions per place. [2024-06-20 17:19:25,416 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 124 selfloop transitions, 75 changer transitions 0/202 dead transitions. [2024-06-20 17:19:25,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 202 transitions, 2704 flow [2024-06-20 17:19:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:19:25,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-20 17:19:25,418 INFO L175 Difference]: Start difference. First operand has 135 places, 166 transitions, 1893 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:19:25,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 202 transitions, 2704 flow [2024-06-20 17:19:25,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 202 transitions, 2600 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:25,484 INFO L231 Difference]: Finished difference. Result has 140 places, 169 transitions, 1998 flow [2024-06-20 17:19:25,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1998, PETRI_PLACES=140, PETRI_TRANSITIONS=169} [2024-06-20 17:19:25,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-20 17:19:25,485 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 169 transitions, 1998 flow [2024-06-20 17:19:25,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:25,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:25,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:25,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:19:25,485 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)] === [2024-06-20 17:19:25,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:25,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1583454224, now seen corresponding path program 3 times [2024-06-20 17:19:25,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:25,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345659214] [2024-06-20 17:19:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:25,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:26,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:26,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345659214] [2024-06-20 17:19:26,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345659214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:26,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:26,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:26,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864529756] [2024-06-20 17:19:26,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:26,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:26,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:26,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:26,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:26,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 169 transitions, 1998 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:26,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:26,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:26,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:27,032 INFO L124 PetriNetUnfolderBase]: 1966/2926 cut-off events. [2024-06-20 17:19:27,032 INFO L125 PetriNetUnfolderBase]: For 75407/75429 co-relation queries the response was YES. [2024-06-20 17:19:27,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20329 conditions, 2926 events. 1966/2926 cut-off events. For 75407/75429 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13368 event pairs, 528 based on Foata normal form. 18/2942 useless extension candidates. Maximal degree in co-relation 20263. Up to 2825 conditions per place. [2024-06-20 17:19:27,059 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 161 selfloop transitions, 30 changer transitions 0/194 dead transitions. [2024-06-20 17:19:27,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 194 transitions, 2462 flow [2024-06-20 17:19:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:19:27,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-20 17:19:27,061 INFO L175 Difference]: Start difference. First operand has 140 places, 169 transitions, 1998 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:19:27,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 194 transitions, 2462 flow [2024-06-20 17:19:27,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 194 transitions, 2250 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:27,122 INFO L231 Difference]: Finished difference. Result has 142 places, 171 transitions, 1882 flow [2024-06-20 17:19:27,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1882, PETRI_PLACES=142, PETRI_TRANSITIONS=171} [2024-06-20 17:19:27,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-20 17:19:27,123 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 171 transitions, 1882 flow [2024-06-20 17:19:27,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:27,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:27,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:27,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:19:27,124 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:27,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:27,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1590806091, now seen corresponding path program 6 times [2024-06-20 17:19:27,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:27,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147915203] [2024-06-20 17:19:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:27,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:27,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147915203] [2024-06-20 17:19:27,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147915203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:27,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:27,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:27,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172996815] [2024-06-20 17:19:27,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:27,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:27,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:27,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:27,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:27,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:27,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 171 transitions, 1882 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:27,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:27,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:27,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:28,502 INFO L124 PetriNetUnfolderBase]: 1952/2911 cut-off events. [2024-06-20 17:19:28,502 INFO L125 PetriNetUnfolderBase]: For 79119/79130 co-relation queries the response was YES. [2024-06-20 17:19:28,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19617 conditions, 2911 events. 1952/2911 cut-off events. For 79119/79130 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13312 event pairs, 514 based on Foata normal form. 12/2920 useless extension candidates. Maximal degree in co-relation 19552. Up to 2361 conditions per place. [2024-06-20 17:19:28,527 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 129 selfloop transitions, 72 changer transitions 0/204 dead transitions. [2024-06-20 17:19:28,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 204 transitions, 2670 flow [2024-06-20 17:19:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:19:28,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-20 17:19:28,529 INFO L175 Difference]: Start difference. First operand has 142 places, 171 transitions, 1882 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:19:28,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 204 transitions, 2670 flow [2024-06-20 17:19:28,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 204 transitions, 2570 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:28,608 INFO L231 Difference]: Finished difference. Result has 144 places, 171 transitions, 1938 flow [2024-06-20 17:19:28,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1938, PETRI_PLACES=144, PETRI_TRANSITIONS=171} [2024-06-20 17:19:28,609 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-20 17:19:28,609 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 171 transitions, 1938 flow [2024-06-20 17:19:28,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:28,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:28,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:28,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:19:28,609 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)] === [2024-06-20 17:19:28,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:28,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1590805874, now seen corresponding path program 4 times [2024-06-20 17:19:28,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:28,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894328765] [2024-06-20 17:19:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:28,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:29,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:29,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894328765] [2024-06-20 17:19:29,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894328765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:29,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:29,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:29,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636160510] [2024-06-20 17:19:29,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:29,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:29,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:29,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:29,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 171 transitions, 1938 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:29,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:29,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:29,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:30,235 INFO L124 PetriNetUnfolderBase]: 1941/2891 cut-off events. [2024-06-20 17:19:30,235 INFO L125 PetriNetUnfolderBase]: For 82120/82142 co-relation queries the response was YES. [2024-06-20 17:19:30,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19855 conditions, 2891 events. 1941/2891 cut-off events. For 82120/82142 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13222 event pairs, 522 based on Foata normal form. 18/2907 useless extension candidates. Maximal degree in co-relation 19789. Up to 2790 conditions per place. [2024-06-20 17:19:30,256 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 164 selfloop transitions, 29 changer transitions 0/196 dead transitions. [2024-06-20 17:19:30,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 196 transitions, 2406 flow [2024-06-20 17:19:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 17:19:30,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-20 17:19:30,257 INFO L175 Difference]: Start difference. First operand has 144 places, 171 transitions, 1938 flow. Second operand 8 states and 127 transitions. [2024-06-20 17:19:30,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 196 transitions, 2406 flow [2024-06-20 17:19:30,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 196 transitions, 2238 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:30,335 INFO L231 Difference]: Finished difference. Result has 146 places, 173 transitions, 1864 flow [2024-06-20 17:19:30,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1864, PETRI_PLACES=146, PETRI_TRANSITIONS=173} [2024-06-20 17:19:30,335 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-20 17:19:30,335 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 173 transitions, 1864 flow [2024-06-20 17:19:30,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:30,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:30,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:30,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:19:30,336 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)] === [2024-06-20 17:19:30,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1053991146, now seen corresponding path program 1 times [2024-06-20 17:19:30,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:30,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051356718] [2024-06-20 17:19:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:30,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:31,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:31,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051356718] [2024-06-20 17:19:31,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051356718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:31,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:31,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:31,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874001822] [2024-06-20 17:19:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:31,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:31,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:31,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:31,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:31,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 173 transitions, 1864 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:31,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:31,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:31,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:32,131 INFO L124 PetriNetUnfolderBase]: 1993/2998 cut-off events. [2024-06-20 17:19:32,132 INFO L125 PetriNetUnfolderBase]: For 94079/94110 co-relation queries the response was YES. [2024-06-20 17:19:32,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20668 conditions, 2998 events. 1993/2998 cut-off events. For 94079/94110 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14095 event pairs, 477 based on Foata normal form. 11/2955 useless extension candidates. Maximal degree in co-relation 20602. Up to 2707 conditions per place. [2024-06-20 17:19:32,152 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 155 selfloop transitions, 45 changer transitions 0/237 dead transitions. [2024-06-20 17:19:32,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 237 transitions, 2682 flow [2024-06-20 17:19:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:19:32,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 17:19:32,154 INFO L175 Difference]: Start difference. First operand has 146 places, 173 transitions, 1864 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:19:32,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 237 transitions, 2682 flow [2024-06-20 17:19:32,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 237 transitions, 2610 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:32,236 INFO L231 Difference]: Finished difference. Result has 152 places, 200 transitions, 2237 flow [2024-06-20 17:19:32,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2237, PETRI_PLACES=152, PETRI_TRANSITIONS=200} [2024-06-20 17:19:32,237 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-20 17:19:32,237 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 200 transitions, 2237 flow [2024-06-20 17:19:32,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:32,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:32,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:32,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:19:32,238 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)] === [2024-06-20 17:19:32,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:32,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1723403654, now seen corresponding path program 2 times [2024-06-20 17:19:32,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:32,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629923303] [2024-06-20 17:19:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:32,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:33,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:33,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629923303] [2024-06-20 17:19:33,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629923303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:33,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:33,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:33,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006573660] [2024-06-20 17:19:33,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:33,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:33,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:33,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:33,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:33,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:33,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 200 transitions, 2237 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:33,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:33,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:33,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:33,917 INFO L124 PetriNetUnfolderBase]: 2002/3015 cut-off events. [2024-06-20 17:19:33,917 INFO L125 PetriNetUnfolderBase]: For 100527/100575 co-relation queries the response was YES. [2024-06-20 17:19:33,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21345 conditions, 3015 events. 2002/3015 cut-off events. For 100527/100575 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14182 event pairs, 342 based on Foata normal form. 25/2984 useless extension candidates. Maximal degree in co-relation 21275. Up to 2658 conditions per place. [2024-06-20 17:19:33,941 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-06-20 17:19:33,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 233 transitions, 2761 flow [2024-06-20 17:19:33,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:19:33,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-20 17:19:33,943 INFO L175 Difference]: Start difference. First operand has 152 places, 200 transitions, 2237 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:19:33,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 233 transitions, 2761 flow [2024-06-20 17:19:34,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 233 transitions, 2692 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:34,028 INFO L231 Difference]: Finished difference. Result has 157 places, 202 transitions, 2314 flow [2024-06-20 17:19:34,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2314, PETRI_PLACES=157, PETRI_TRANSITIONS=202} [2024-06-20 17:19:34,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-20 17:19:34,028 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 202 transitions, 2314 flow [2024-06-20 17:19:34,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:34,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:34,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:34,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:19:34,029 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)] === [2024-06-20 17:19:34,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:34,030 INFO L85 PathProgramCache]: Analyzing trace with hash -613312244, now seen corresponding path program 3 times [2024-06-20 17:19:34,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:34,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503284717] [2024-06-20 17:19:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:34,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:34,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:34,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503284717] [2024-06-20 17:19:34,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503284717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:34,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:34,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:34,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663648736] [2024-06-20 17:19:34,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:34,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:34,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:34,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:34,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:35,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:35,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 202 transitions, 2314 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:35,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:35,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:35,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:35,716 INFO L124 PetriNetUnfolderBase]: 2017/3042 cut-off events. [2024-06-20 17:19:35,716 INFO L125 PetriNetUnfolderBase]: For 108474/108533 co-relation queries the response was YES. [2024-06-20 17:19:35,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21922 conditions, 3042 events. 2017/3042 cut-off events. For 108474/108533 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14373 event pairs, 454 based on Foata normal form. 16/3000 useless extension candidates. Maximal degree in co-relation 21851. Up to 2709 conditions per place. [2024-06-20 17:19:35,739 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 145 selfloop transitions, 53 changer transitions 0/235 dead transitions. [2024-06-20 17:19:35,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 235 transitions, 2848 flow [2024-06-20 17:19:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:19:35,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 17:19:35,740 INFO L175 Difference]: Start difference. First operand has 157 places, 202 transitions, 2314 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:19:35,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 235 transitions, 2848 flow [2024-06-20 17:19:35,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 235 transitions, 2718 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:35,824 INFO L231 Difference]: Finished difference. Result has 159 places, 204 transitions, 2342 flow [2024-06-20 17:19:35,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2342, PETRI_PLACES=159, PETRI_TRANSITIONS=204} [2024-06-20 17:19:35,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-20 17:19:35,825 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 204 transitions, 2342 flow [2024-06-20 17:19:35,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:35,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:35,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:35,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:19:35,825 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)] === [2024-06-20 17:19:35,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:35,826 INFO L85 PathProgramCache]: Analyzing trace with hash 568025418, now seen corresponding path program 1 times [2024-06-20 17:19:35,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:35,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191919238] [2024-06-20 17:19:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:35,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:36,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:36,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191919238] [2024-06-20 17:19:36,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191919238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:36,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:36,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:36,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781274834] [2024-06-20 17:19:36,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:36,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:36,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:36,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:36,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 204 transitions, 2342 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:36,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:36,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:36,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:37,533 INFO L124 PetriNetUnfolderBase]: 2119/3167 cut-off events. [2024-06-20 17:19:37,534 INFO L125 PetriNetUnfolderBase]: For 101451/101455 co-relation queries the response was YES. [2024-06-20 17:19:37,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22196 conditions, 3167 events. 2119/3167 cut-off events. For 101451/101455 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14778 event pairs, 495 based on Foata normal form. 6/3172 useless extension candidates. Maximal degree in co-relation 22124. Up to 2982 conditions per place. [2024-06-20 17:19:37,555 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 199 selfloop transitions, 33 changer transitions 0/235 dead transitions. [2024-06-20 17:19:37,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 235 transitions, 2908 flow [2024-06-20 17:19:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:19:37,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 17:19:37,556 INFO L175 Difference]: Start difference. First operand has 159 places, 204 transitions, 2342 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:19:37,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 235 transitions, 2908 flow [2024-06-20 17:19:37,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 235 transitions, 2766 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:37,632 INFO L231 Difference]: Finished difference. Result has 161 places, 204 transitions, 2278 flow [2024-06-20 17:19:37,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2278, PETRI_PLACES=161, PETRI_TRANSITIONS=204} [2024-06-20 17:19:37,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-20 17:19:37,633 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 204 transitions, 2278 flow [2024-06-20 17:19:37,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:37,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:37,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:37,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:19:37,633 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:37,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash 572609264, now seen corresponding path program 4 times [2024-06-20 17:19:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:37,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866610417] [2024-06-20 17:19:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:37,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:38,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866610417] [2024-06-20 17:19:38,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866610417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:38,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:38,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:38,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348289175] [2024-06-20 17:19:38,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:38,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:38,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:38,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:38,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:38,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 204 transitions, 2278 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:38,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:38,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:38,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:39,348 INFO L124 PetriNetUnfolderBase]: 2030/3065 cut-off events. [2024-06-20 17:19:39,348 INFO L125 PetriNetUnfolderBase]: For 115189/115247 co-relation queries the response was YES. [2024-06-20 17:19:39,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22027 conditions, 3065 events. 2030/3065 cut-off events. For 115189/115247 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14550 event pairs, 453 based on Foata normal form. 15/3014 useless extension candidates. Maximal degree in co-relation 21954. Up to 2698 conditions per place. [2024-06-20 17:19:39,372 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 138 selfloop transitions, 59 changer transitions 0/234 dead transitions. [2024-06-20 17:19:39,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 234 transitions, 2796 flow [2024-06-20 17:19:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:19:39,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 17:19:39,373 INFO L175 Difference]: Start difference. First operand has 161 places, 204 transitions, 2278 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:19:39,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 234 transitions, 2796 flow [2024-06-20 17:19:39,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 234 transitions, 2712 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:39,459 INFO L231 Difference]: Finished difference. Result has 164 places, 206 transitions, 2362 flow [2024-06-20 17:19:39,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2362, PETRI_PLACES=164, PETRI_TRANSITIONS=206} [2024-06-20 17:19:39,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-20 17:19:39,460 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 206 transitions, 2362 flow [2024-06-20 17:19:39,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:39,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:39,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:39,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:19:39,461 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)] === [2024-06-20 17:19:39,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash 572793962, now seen corresponding path program 1 times [2024-06-20 17:19:39,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:39,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71533897] [2024-06-20 17:19:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:39,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:40,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:40,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71533897] [2024-06-20 17:19:40,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71533897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:40,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:40,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:40,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962003076] [2024-06-20 17:19:40,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:40,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:40,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:40,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:40,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 206 transitions, 2362 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:40,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:40,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:40,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:41,171 INFO L124 PetriNetUnfolderBase]: 2236/3360 cut-off events. [2024-06-20 17:19:41,171 INFO L125 PetriNetUnfolderBase]: For 126212/126214 co-relation queries the response was YES. [2024-06-20 17:19:41,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23532 conditions, 3360 events. 2236/3360 cut-off events. For 126212/126214 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16036 event pairs, 505 based on Foata normal form. 26/3385 useless extension candidates. Maximal degree in co-relation 23458. Up to 2896 conditions per place. [2024-06-20 17:19:41,198 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 192 selfloop transitions, 50 changer transitions 0/245 dead transitions. [2024-06-20 17:19:41,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 245 transitions, 3004 flow [2024-06-20 17:19:41,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:41,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:19:41,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-20 17:19:41,200 INFO L175 Difference]: Start difference. First operand has 164 places, 206 transitions, 2362 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:19:41,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 245 transitions, 3004 flow [2024-06-20 17:19:41,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 245 transitions, 2856 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:41,319 INFO L231 Difference]: Finished difference. Result has 167 places, 208 transitions, 2352 flow [2024-06-20 17:19:41,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2352, PETRI_PLACES=167, PETRI_TRANSITIONS=208} [2024-06-20 17:19:41,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-20 17:19:41,319 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 208 transitions, 2352 flow [2024-06-20 17:19:41,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:41,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:41,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:41,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:19:41,320 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)] === [2024-06-20 17:19:41,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:41,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1834165626, now seen corresponding path program 2 times [2024-06-20 17:19:41,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:41,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676197304] [2024-06-20 17:19:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:42,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:42,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676197304] [2024-06-20 17:19:42,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676197304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:42,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:42,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:42,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122486114] [2024-06-20 17:19:42,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:42,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:42,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:42,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:42,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:42,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:42,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 208 transitions, 2352 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:42,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:42,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:42,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:43,104 INFO L124 PetriNetUnfolderBase]: 2253/3387 cut-off events. [2024-06-20 17:19:43,105 INFO L125 PetriNetUnfolderBase]: For 123692/123718 co-relation queries the response was YES. [2024-06-20 17:19:43,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24029 conditions, 3387 events. 2253/3387 cut-off events. For 123692/123718 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16172 event pairs, 534 based on Foata normal form. 24/3408 useless extension candidates. Maximal degree in co-relation 23954. Up to 3211 conditions per place. [2024-06-20 17:19:43,134 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 197 selfloop transitions, 46 changer transitions 0/246 dead transitions. [2024-06-20 17:19:43,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 246 transitions, 2995 flow [2024-06-20 17:19:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:19:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:19:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-20 17:19:43,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-20 17:19:43,136 INFO L175 Difference]: Start difference. First operand has 167 places, 208 transitions, 2352 flow. Second operand 10 states and 155 transitions. [2024-06-20 17:19:43,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 246 transitions, 2995 flow [2024-06-20 17:19:43,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 246 transitions, 2882 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:43,229 INFO L231 Difference]: Finished difference. Result has 171 places, 212 transitions, 2408 flow [2024-06-20 17:19:43,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2408, PETRI_PLACES=171, PETRI_TRANSITIONS=212} [2024-06-20 17:19:43,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-20 17:19:43,230 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 212 transitions, 2408 flow [2024-06-20 17:19:43,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:43,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:43,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:43,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:19:43,230 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)] === [2024-06-20 17:19:43,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:43,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1842200826, now seen corresponding path program 3 times [2024-06-20 17:19:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:43,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050968225] [2024-06-20 17:19:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:43,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:44,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:44,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050968225] [2024-06-20 17:19:44,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050968225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:44,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:44,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664667509] [2024-06-20 17:19:44,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:44,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:44,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:44,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:44,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:44,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:44,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 212 transitions, 2408 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:44,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:44,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:44,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:45,019 INFO L124 PetriNetUnfolderBase]: 2270/3414 cut-off events. [2024-06-20 17:19:45,019 INFO L125 PetriNetUnfolderBase]: For 130687/130713 co-relation queries the response was YES. [2024-06-20 17:19:45,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24461 conditions, 3414 events. 2270/3414 cut-off events. For 130687/130713 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16355 event pairs, 485 based on Foata normal form. 24/3435 useless extension candidates. Maximal degree in co-relation 24384. Up to 3155 conditions per place. [2024-06-20 17:19:45,043 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 195 selfloop transitions, 52 changer transitions 0/250 dead transitions. [2024-06-20 17:19:45,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 250 transitions, 3214 flow [2024-06-20 17:19:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:19:45,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:19:45,045 INFO L175 Difference]: Start difference. First operand has 171 places, 212 transitions, 2408 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:19:45,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 250 transitions, 3214 flow [2024-06-20 17:19:45,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 250 transitions, 3112 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:45,136 INFO L231 Difference]: Finished difference. Result has 174 places, 217 transitions, 2514 flow [2024-06-20 17:19:45,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2306, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2514, PETRI_PLACES=174, PETRI_TRANSITIONS=217} [2024-06-20 17:19:45,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-20 17:19:45,136 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 217 transitions, 2514 flow [2024-06-20 17:19:45,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:45,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:45,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:45,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:19:45,137 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:45,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:45,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1842446594, now seen corresponding path program 1 times [2024-06-20 17:19:45,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:45,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712517077] [2024-06-20 17:19:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:45,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:46,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:46,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712517077] [2024-06-20 17:19:46,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712517077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:46,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:46,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823880103] [2024-06-20 17:19:46,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:46,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:46,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:46,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 217 transitions, 2514 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:46,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:46,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:46,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:46,905 INFO L124 PetriNetUnfolderBase]: 2260/3404 cut-off events. [2024-06-20 17:19:46,905 INFO L125 PetriNetUnfolderBase]: For 136519/136541 co-relation queries the response was YES. [2024-06-20 17:19:46,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24699 conditions, 3404 events. 2260/3404 cut-off events. For 136519/136541 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16311 event pairs, 513 based on Foata normal form. 12/3411 useless extension candidates. Maximal degree in co-relation 24620. Up to 2795 conditions per place. [2024-06-20 17:19:46,933 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 159 selfloop transitions, 88 changer transitions 0/250 dead transitions. [2024-06-20 17:19:46,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 250 transitions, 3246 flow [2024-06-20 17:19:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:19:46,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:19:46,935 INFO L175 Difference]: Start difference. First operand has 174 places, 217 transitions, 2514 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:19:46,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 250 transitions, 3246 flow [2024-06-20 17:19:47,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 250 transitions, 3133 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:47,066 INFO L231 Difference]: Finished difference. Result has 178 places, 217 transitions, 2585 flow [2024-06-20 17:19:47,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2585, PETRI_PLACES=178, PETRI_TRANSITIONS=217} [2024-06-20 17:19:47,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-20 17:19:47,067 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 217 transitions, 2585 flow [2024-06-20 17:19:47,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:47,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:47,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:47,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:19:47,068 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)] === [2024-06-20 17:19:47,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:47,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2070340986, now seen corresponding path program 4 times [2024-06-20 17:19:47,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:47,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823796395] [2024-06-20 17:19:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:47,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:48,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:48,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823796395] [2024-06-20 17:19:48,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823796395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:48,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:48,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:48,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367627469] [2024-06-20 17:19:48,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:48,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:48,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:48,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:48,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 217 transitions, 2585 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:48,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:48,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:48,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:48,849 INFO L124 PetriNetUnfolderBase]: 2252/3388 cut-off events. [2024-06-20 17:19:48,849 INFO L125 PetriNetUnfolderBase]: For 141130/141156 co-relation queries the response was YES. [2024-06-20 17:19:48,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24885 conditions, 3388 events. 2252/3388 cut-off events. For 141130/141156 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16238 event pairs, 530 based on Foata normal form. 24/3409 useless extension candidates. Maximal degree in co-relation 24804. Up to 3253 conditions per place. [2024-06-20 17:19:48,879 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 211 selfloop transitions, 33 changer transitions 0/247 dead transitions. [2024-06-20 17:19:48,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 247 transitions, 3169 flow [2024-06-20 17:19:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 17:19:48,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-20 17:19:48,880 INFO L175 Difference]: Start difference. First operand has 178 places, 217 transitions, 2585 flow. Second operand 9 states and 141 transitions. [2024-06-20 17:19:48,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 247 transitions, 3169 flow [2024-06-20 17:19:48,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 247 transitions, 2967 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 17:19:48,999 INFO L231 Difference]: Finished difference. Result has 179 places, 217 transitions, 2456 flow [2024-06-20 17:19:48,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2456, PETRI_PLACES=179, PETRI_TRANSITIONS=217} [2024-06-20 17:19:48,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-20 17:19:49,000 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 217 transitions, 2456 flow [2024-06-20 17:19:49,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:49,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:49,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:49,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:19:49,000 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)] === [2024-06-20 17:19:49,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2070347744, now seen corresponding path program 2 times [2024-06-20 17:19:49,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:49,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309086944] [2024-06-20 17:19:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:49,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:50,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309086944] [2024-06-20 17:19:50,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309086944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:50,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:50,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:50,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15590985] [2024-06-20 17:19:50,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:50,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:50,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:50,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:50,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 217 transitions, 2456 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:50,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:50,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:50,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:50,841 INFO L124 PetriNetUnfolderBase]: 2274/3424 cut-off events. [2024-06-20 17:19:50,841 INFO L125 PetriNetUnfolderBase]: For 147238/147260 co-relation queries the response was YES. [2024-06-20 17:19:50,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24897 conditions, 3424 events. 2274/3424 cut-off events. For 147238/147260 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16411 event pairs, 519 based on Foata normal form. 12/3431 useless extension candidates. Maximal degree in co-relation 24815. Up to 2802 conditions per place. [2024-06-20 17:19:50,870 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 165 selfloop transitions, 86 changer transitions 0/254 dead transitions. [2024-06-20 17:19:50,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 254 transitions, 3247 flow [2024-06-20 17:19:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:19:50,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-20 17:19:50,872 INFO L175 Difference]: Start difference. First operand has 179 places, 217 transitions, 2456 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:19:50,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 254 transitions, 3247 flow [2024-06-20 17:19:50,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 254 transitions, 3174 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:50,985 INFO L231 Difference]: Finished difference. Result has 181 places, 220 transitions, 2602 flow [2024-06-20 17:19:50,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2602, PETRI_PLACES=181, PETRI_TRANSITIONS=220} [2024-06-20 17:19:50,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-20 17:19:50,986 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 220 transitions, 2602 flow [2024-06-20 17:19:50,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:50,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:50,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:50,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:19:50,986 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)] === [2024-06-20 17:19:50,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:50,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2007190918, now seen corresponding path program 5 times [2024-06-20 17:19:50,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:50,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510707079] [2024-06-20 17:19:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:50,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:52,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:52,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510707079] [2024-06-20 17:19:52,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510707079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:52,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:52,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:52,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346942398] [2024-06-20 17:19:52,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:52,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:52,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:52,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:52,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:19:52,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 220 transitions, 2602 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:52,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:52,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:19:52,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:52,762 INFO L124 PetriNetUnfolderBase]: 2140/3253 cut-off events. [2024-06-20 17:19:52,762 INFO L125 PetriNetUnfolderBase]: For 160566/160652 co-relation queries the response was YES. [2024-06-20 17:19:52,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24438 conditions, 3253 events. 2140/3253 cut-off events. For 160566/160652 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15754 event pairs, 477 based on Foata normal form. 19/3191 useless extension candidates. Maximal degree in co-relation 24355. Up to 2820 conditions per place. [2024-06-20 17:19:52,788 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 70 changer transitions 0/248 dead transitions. [2024-06-20 17:19:52,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 248 transitions, 3132 flow [2024-06-20 17:19:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:19:52,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-20 17:19:52,789 INFO L175 Difference]: Start difference. First operand has 181 places, 220 transitions, 2602 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:19:52,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 248 transitions, 3132 flow [2024-06-20 17:19:52,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 248 transitions, 2942 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:52,919 INFO L231 Difference]: Finished difference. Result has 182 places, 222 transitions, 2606 flow [2024-06-20 17:19:52,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2606, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2024-06-20 17:19:52,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-20 17:19:52,919 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 2606 flow [2024-06-20 17:19:52,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:52,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:52,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:52,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:19:52,920 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)] === [2024-06-20 17:19:52,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2070520724, now seen corresponding path program 3 times [2024-06-20 17:19:52,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:52,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948361003] [2024-06-20 17:19:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:52,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:53,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:53,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948361003] [2024-06-20 17:19:53,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948361003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:53,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:53,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:53,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963544829] [2024-06-20 17:19:53,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:53,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:53,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:53,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:53,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:53,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:53,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:53,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:53,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:53,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:54,674 INFO L124 PetriNetUnfolderBase]: 2251/3391 cut-off events. [2024-06-20 17:19:54,674 INFO L125 PetriNetUnfolderBase]: For 156044/156066 co-relation queries the response was YES. [2024-06-20 17:19:54,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24942 conditions, 3391 events. 2251/3391 cut-off events. For 156044/156066 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16214 event pairs, 509 based on Foata normal form. 12/3398 useless extension candidates. Maximal degree in co-relation 24858. Up to 2775 conditions per place. [2024-06-20 17:19:54,703 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 160 selfloop transitions, 91 changer transitions 0/254 dead transitions. [2024-06-20 17:19:54,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 254 transitions, 3210 flow [2024-06-20 17:19:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:19:54,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 17:19:54,704 INFO L175 Difference]: Start difference. First operand has 182 places, 222 transitions, 2606 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:19:54,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 254 transitions, 3210 flow [2024-06-20 17:19:54,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 254 transitions, 3022 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:54,854 INFO L231 Difference]: Finished difference. Result has 185 places, 222 transitions, 2608 flow [2024-06-20 17:19:54,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2608, PETRI_PLACES=185, PETRI_TRANSITIONS=222} [2024-06-20 17:19:54,854 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-20 17:19:54,854 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 222 transitions, 2608 flow [2024-06-20 17:19:54,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:54,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:54,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:54,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:19:54,855 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:54,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:54,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2145825076, now seen corresponding path program 1 times [2024-06-20 17:19:54,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:54,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685711445] [2024-06-20 17:19:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:54,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:55,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:55,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685711445] [2024-06-20 17:19:55,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685711445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:55,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:55,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:19:55,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905753053] [2024-06-20 17:19:55,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:55,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:19:55,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:55,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:19:55,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:19:55,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:55,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 222 transitions, 2608 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:55,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:55,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:55,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:56,754 INFO L124 PetriNetUnfolderBase]: 2268/3412 cut-off events. [2024-06-20 17:19:56,755 INFO L125 PetriNetUnfolderBase]: For 160191/160195 co-relation queries the response was YES. [2024-06-20 17:19:56,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25298 conditions, 3412 events. 2268/3412 cut-off events. For 160191/160195 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16310 event pairs, 350 based on Foata normal form. 8/3419 useless extension candidates. Maximal degree in co-relation 25213. Up to 3169 conditions per place. [2024-06-20 17:19:56,784 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 29 changer transitions 0/266 dead transitions. [2024-06-20 17:19:56,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 266 transitions, 3346 flow [2024-06-20 17:19:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:19:56,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:19:56,785 INFO L175 Difference]: Start difference. First operand has 185 places, 222 transitions, 2608 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:19:56,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 266 transitions, 3346 flow [2024-06-20 17:19:56,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 266 transitions, 3087 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 17:19:56,915 INFO L231 Difference]: Finished difference. Result has 186 places, 230 transitions, 2538 flow [2024-06-20 17:19:56,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2538, PETRI_PLACES=186, PETRI_TRANSITIONS=230} [2024-06-20 17:19:56,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-20 17:19:56,916 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 230 transitions, 2538 flow [2024-06-20 17:19:56,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:56,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:56,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:56,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:19:56,916 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:56,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1205268006, now seen corresponding path program 2 times [2024-06-20 17:19:56,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:56,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523623302] [2024-06-20 17:19:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:56,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:58,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:58,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523623302] [2024-06-20 17:19:58,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523623302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:58,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:58,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:19:58,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217792249] [2024-06-20 17:19:58,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:58,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:19:58,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:58,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:19:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:19:58,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:19:58,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 230 transitions, 2538 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:58,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:58,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:19:58,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:58,952 INFO L124 PetriNetUnfolderBase]: 2310/3478 cut-off events. [2024-06-20 17:19:58,952 INFO L125 PetriNetUnfolderBase]: For 171850/171854 co-relation queries the response was YES. [2024-06-20 17:19:58,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25895 conditions, 3478 events. 2310/3478 cut-off events. For 171850/171854 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16759 event pairs, 471 based on Foata normal form. 8/3485 useless extension candidates. Maximal degree in co-relation 25807. Up to 3218 conditions per place. [2024-06-20 17:19:58,979 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 36 changer transitions 0/273 dead transitions. [2024-06-20 17:19:58,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 273 transitions, 3436 flow [2024-06-20 17:19:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 17:19:58,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-20 17:19:58,981 INFO L175 Difference]: Start difference. First operand has 186 places, 230 transitions, 2538 flow. Second operand 9 states and 149 transitions. [2024-06-20 17:19:58,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 273 transitions, 3436 flow [2024-06-20 17:19:59,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 273 transitions, 3349 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:59,134 INFO L231 Difference]: Finished difference. Result has 192 places, 235 transitions, 2623 flow [2024-06-20 17:19:59,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2623, PETRI_PLACES=192, PETRI_TRANSITIONS=235} [2024-06-20 17:19:59,135 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-20 17:19:59,135 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 235 transitions, 2623 flow [2024-06-20 17:19:59,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:59,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:59,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:59,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:19:59,136 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)] === [2024-06-20 17:19:59,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:59,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1685809140, now seen corresponding path program 3 times [2024-06-20 17:19:59,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:59,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387670949] [2024-06-20 17:19:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:59,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:00,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:00,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387670949] [2024-06-20 17:20:00,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387670949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:00,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:00,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:20:00,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308090295] [2024-06-20 17:20:00,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:00,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:20:00,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:00,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:20:00,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:20:00,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:00,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 235 transitions, 2623 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:00,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:00,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:00,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:01,199 INFO L124 PetriNetUnfolderBase]: 2302/3466 cut-off events. [2024-06-20 17:20:01,199 INFO L125 PetriNetUnfolderBase]: For 177680/177684 co-relation queries the response was YES. [2024-06-20 17:20:01,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25989 conditions, 3466 events. 2302/3466 cut-off events. For 177680/177684 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16659 event pairs, 471 based on Foata normal form. 8/3473 useless extension candidates. Maximal degree in co-relation 25898. Up to 3258 conditions per place. [2024-06-20 17:20:01,229 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 35 changer transitions 0/272 dead transitions. [2024-06-20 17:20:01,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 272 transitions, 3300 flow [2024-06-20 17:20:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:20:01,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-20 17:20:01,230 INFO L175 Difference]: Start difference. First operand has 192 places, 235 transitions, 2623 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:20:01,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 272 transitions, 3300 flow [2024-06-20 17:20:01,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 272 transitions, 3173 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:01,410 INFO L231 Difference]: Finished difference. Result has 196 places, 236 transitions, 2599 flow [2024-06-20 17:20:01,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2599, PETRI_PLACES=196, PETRI_TRANSITIONS=236} [2024-06-20 17:20:01,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-20 17:20:01,411 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 236 transitions, 2599 flow [2024-06-20 17:20:01,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:01,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:01,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:01,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:20:01,411 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)] === [2024-06-20 17:20:01,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1457999178, now seen corresponding path program 4 times [2024-06-20 17:20:01,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:01,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718796562] [2024-06-20 17:20:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:02,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:02,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718796562] [2024-06-20 17:20:02,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718796562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:02,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:02,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:20:02,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195417857] [2024-06-20 17:20:02,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:02,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:20:02,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:20:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:20:02,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:02,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 236 transitions, 2599 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:02,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:02,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:02,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:03,432 INFO L124 PetriNetUnfolderBase]: 2319/3495 cut-off events. [2024-06-20 17:20:03,432 INFO L125 PetriNetUnfolderBase]: For 185430/185432 co-relation queries the response was YES. [2024-06-20 17:20:03,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26251 conditions, 3495 events. 2319/3495 cut-off events. For 185430/185432 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16855 event pairs, 473 based on Foata normal form. 6/3500 useless extension candidates. Maximal degree in co-relation 26158. Up to 3133 conditions per place. [2024-06-20 17:20:03,464 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 217 selfloop transitions, 51 changer transitions 0/271 dead transitions. [2024-06-20 17:20:03,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 271 transitions, 3279 flow [2024-06-20 17:20:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:20:03,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:20:03,466 INFO L175 Difference]: Start difference. First operand has 196 places, 236 transitions, 2599 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:20:03,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 271 transitions, 3279 flow [2024-06-20 17:20:03,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 271 transitions, 3213 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:03,644 INFO L231 Difference]: Finished difference. Result has 198 places, 238 transitions, 2688 flow [2024-06-20 17:20:03,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2688, PETRI_PLACES=198, PETRI_TRANSITIONS=238} [2024-06-20 17:20:03,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-20 17:20:03,645 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 238 transitions, 2688 flow [2024-06-20 17:20:03,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:03,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:03,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:03,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:20:03,646 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)] === [2024-06-20 17:20:03,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:03,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1827908490, now seen corresponding path program 5 times [2024-06-20 17:20:03,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:03,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651290160] [2024-06-20 17:20:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:04,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:04,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651290160] [2024-06-20 17:20:04,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651290160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:04,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:04,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:20:04,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098996796] [2024-06-20 17:20:04,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:04,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:20:04,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:20:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:20:04,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:04,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 238 transitions, 2688 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:04,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:04,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:04,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:05,670 INFO L124 PetriNetUnfolderBase]: 2472/3742 cut-off events. [2024-06-20 17:20:05,670 INFO L125 PetriNetUnfolderBase]: For 219385/219387 co-relation queries the response was YES. [2024-06-20 17:20:05,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29092 conditions, 3742 events. 2472/3742 cut-off events. For 219385/219387 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18496 event pairs, 510 based on Foata normal form. 6/3747 useless extension candidates. Maximal degree in co-relation 28998. Up to 3149 conditions per place. [2024-06-20 17:20:05,709 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 224 selfloop transitions, 55 changer transitions 0/282 dead transitions. [2024-06-20 17:20:05,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 282 transitions, 3648 flow [2024-06-20 17:20:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:20:05,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 17:20:05,711 INFO L175 Difference]: Start difference. First operand has 198 places, 238 transitions, 2688 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:20:05,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 282 transitions, 3648 flow [2024-06-20 17:20:05,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 282 transitions, 3511 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:05,927 INFO L231 Difference]: Finished difference. Result has 201 places, 243 transitions, 2780 flow [2024-06-20 17:20:05,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2551, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2780, PETRI_PLACES=201, PETRI_TRANSITIONS=243} [2024-06-20 17:20:05,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-20 17:20:05,928 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 243 transitions, 2780 flow [2024-06-20 17:20:05,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:05,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:05,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:05,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:20:05,929 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)] === [2024-06-20 17:20:05,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1833418740, now seen corresponding path program 6 times [2024-06-20 17:20:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:05,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115272567] [2024-06-20 17:20:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:05,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:07,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:07,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115272567] [2024-06-20 17:20:07,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115272567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:07,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:07,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:20:07,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313364057] [2024-06-20 17:20:07,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:07,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:20:07,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:07,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:20:07,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:20:07,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:07,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 243 transitions, 2780 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:07,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:07,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:07,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:07,993 INFO L124 PetriNetUnfolderBase]: 2428/3674 cut-off events. [2024-06-20 17:20:07,993 INFO L125 PetriNetUnfolderBase]: For 225394/225396 co-relation queries the response was YES. [2024-06-20 17:20:08,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28050 conditions, 3674 events. 2428/3674 cut-off events. For 225394/225396 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18066 event pairs, 487 based on Foata normal form. 26/3699 useless extension candidates. Maximal degree in co-relation 27954. Up to 3192 conditions per place. [2024-06-20 17:20:08,023 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 226 selfloop transitions, 52 changer transitions 0/281 dead transitions. [2024-06-20 17:20:08,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 281 transitions, 3495 flow [2024-06-20 17:20:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:20:08,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:20:08,025 INFO L175 Difference]: Start difference. First operand has 201 places, 243 transitions, 2780 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:20:08,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 281 transitions, 3495 flow [2024-06-20 17:20:08,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 281 transitions, 3344 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:08,257 INFO L231 Difference]: Finished difference. Result has 205 places, 244 transitions, 2771 flow [2024-06-20 17:20:08,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2771, PETRI_PLACES=205, PETRI_TRANSITIONS=244} [2024-06-20 17:20:08,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-20 17:20:08,257 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 244 transitions, 2771 flow [2024-06-20 17:20:08,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:08,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:08,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:08,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:20:08,258 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:08,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1220305428, now seen corresponding path program 1 times [2024-06-20 17:20:08,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:08,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806985191] [2024-06-20 17:20:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:08,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:09,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806985191] [2024-06-20 17:20:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806985191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:09,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:09,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:09,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541722706] [2024-06-20 17:20:09,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:09,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:09,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:09,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:09,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:09,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 244 transitions, 2771 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) [2024-06-20 17:20:09,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:09,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:09,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:10,058 INFO L124 PetriNetUnfolderBase]: 2547/3875 cut-off events. [2024-06-20 17:20:10,058 INFO L125 PetriNetUnfolderBase]: For 237820/237822 co-relation queries the response was YES. [2024-06-20 17:20:10,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29469 conditions, 3875 events. 2547/3875 cut-off events. For 237820/237822 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19463 event pairs, 510 based on Foata normal form. 18/3892 useless extension candidates. Maximal degree in co-relation 29371. Up to 3007 conditions per place. [2024-06-20 17:20:10,093 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 55 changer transitions 0/288 dead transitions. [2024-06-20 17:20:10,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 288 transitions, 3729 flow [2024-06-20 17:20:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:20:10,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 17:20:10,095 INFO L175 Difference]: Start difference. First operand has 205 places, 244 transitions, 2771 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:20:10,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 288 transitions, 3729 flow [2024-06-20 17:20:10,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 288 transitions, 3626 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:10,323 INFO L231 Difference]: Finished difference. Result has 207 places, 246 transitions, 2838 flow [2024-06-20 17:20:10,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2668, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2838, PETRI_PLACES=207, PETRI_TRANSITIONS=246} [2024-06-20 17:20:10,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-20 17:20:10,323 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 246 transitions, 2838 flow [2024-06-20 17:20:10,323 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) [2024-06-20 17:20:10,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:10,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:10,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:20:10,324 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)] === [2024-06-20 17:20:10,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1016034919, now seen corresponding path program 1 times [2024-06-20 17:20:10,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:10,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931746271] [2024-06-20 17:20:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:10,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:11,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:11,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931746271] [2024-06-20 17:20:11,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931746271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:11,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:11,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:11,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078801418] [2024-06-20 17:20:11,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:11,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:11,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:11,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:11,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:11,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:11,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 246 transitions, 2838 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) [2024-06-20 17:20:11,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:11,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:11,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:12,056 INFO L124 PetriNetUnfolderBase]: 2562/3894 cut-off events. [2024-06-20 17:20:12,057 INFO L125 PetriNetUnfolderBase]: For 233651/233655 co-relation queries the response was YES. [2024-06-20 17:20:12,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29887 conditions, 3894 events. 2562/3894 cut-off events. For 233651/233655 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19650 event pairs, 556 based on Foata normal form. 6/3899 useless extension candidates. Maximal degree in co-relation 29788. Up to 3817 conditions per place. [2024-06-20 17:20:12,092 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 242 selfloop transitions, 30 changer transitions 0/275 dead transitions. [2024-06-20 17:20:12,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 275 transitions, 3648 flow [2024-06-20 17:20:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 17:20:12,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-20 17:20:12,093 INFO L175 Difference]: Start difference. First operand has 207 places, 246 transitions, 2838 flow. Second operand 7 states and 113 transitions. [2024-06-20 17:20:12,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 275 transitions, 3648 flow [2024-06-20 17:20:12,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 275 transitions, 3563 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:12,324 INFO L231 Difference]: Finished difference. Result has 210 places, 255 transitions, 2943 flow [2024-06-20 17:20:12,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2753, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2943, PETRI_PLACES=210, PETRI_TRANSITIONS=255} [2024-06-20 17:20:12,325 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-20 17:20:12,325 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 255 transitions, 2943 flow [2024-06-20 17:20:12,325 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) [2024-06-20 17:20:12,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:12,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:12,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:20:12,326 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:12,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:12,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1549293092, now seen corresponding path program 2 times [2024-06-20 17:20:12,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:12,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243686969] [2024-06-20 17:20:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:12,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:13,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:13,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243686969] [2024-06-20 17:20:13,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243686969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:13,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:13,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:13,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989557393] [2024-06-20 17:20:13,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:13,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:13,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:13,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:13,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 255 transitions, 2943 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) [2024-06-20 17:20:13,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:13,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:13,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:14,088 INFO L124 PetriNetUnfolderBase]: 2654/4052 cut-off events. [2024-06-20 17:20:14,088 INFO L125 PetriNetUnfolderBase]: For 267441/267463 co-relation queries the response was YES. [2024-06-20 17:20:14,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31027 conditions, 4052 events. 2654/4052 cut-off events. For 267441/267463 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20711 event pairs, 543 based on Foata normal form. 32/4079 useless extension candidates. Maximal degree in co-relation 30925. Up to 3298 conditions per place. [2024-06-20 17:20:14,129 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 197 selfloop transitions, 93 changer transitions 0/293 dead transitions. [2024-06-20 17:20:14,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 293 transitions, 3703 flow [2024-06-20 17:20:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:20:14,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 17:20:14,130 INFO L175 Difference]: Start difference. First operand has 210 places, 255 transitions, 2943 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:20:14,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 293 transitions, 3703 flow [2024-06-20 17:20:14,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 293 transitions, 3653 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 17:20:14,410 INFO L231 Difference]: Finished difference. Result has 217 places, 257 transitions, 3142 flow [2024-06-20 17:20:14,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2893, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3142, PETRI_PLACES=217, PETRI_TRANSITIONS=257} [2024-06-20 17:20:14,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-20 17:20:14,411 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 257 transitions, 3142 flow [2024-06-20 17:20:14,411 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) [2024-06-20 17:20:14,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:14,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:14,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:20:14,412 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:14,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:14,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1994775490, now seen corresponding path program 3 times [2024-06-20 17:20:14,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:14,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840715860] [2024-06-20 17:20:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:14,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:15,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:15,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840715860] [2024-06-20 17:20:15,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840715860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:15,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:15,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:15,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435749107] [2024-06-20 17:20:15,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:15,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:15,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:15,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:15,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:15,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 257 transitions, 3142 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) [2024-06-20 17:20:15,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:15,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:15,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:16,248 INFO L124 PetriNetUnfolderBase]: 2823/4331 cut-off events. [2024-06-20 17:20:16,248 INFO L125 PetriNetUnfolderBase]: For 297593/297615 co-relation queries the response was YES. [2024-06-20 17:20:16,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34263 conditions, 4331 events. 2823/4331 cut-off events. For 297593/297615 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22656 event pairs, 576 based on Foata normal form. 24/4350 useless extension candidates. Maximal degree in co-relation 34159. Up to 3286 conditions per place. [2024-06-20 17:20:16,295 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 205 selfloop transitions, 92 changer transitions 0/300 dead transitions. [2024-06-20 17:20:16,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 300 transitions, 4140 flow [2024-06-20 17:20:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:20:16,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 17:20:16,297 INFO L175 Difference]: Start difference. First operand has 217 places, 257 transitions, 3142 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:20:16,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 300 transitions, 4140 flow [2024-06-20 17:20:16,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 300 transitions, 3921 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:16,642 INFO L231 Difference]: Finished difference. Result has 219 places, 259 transitions, 3175 flow [2024-06-20 17:20:16,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2923, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3175, PETRI_PLACES=219, PETRI_TRANSITIONS=259} [2024-06-20 17:20:16,643 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-20 17:20:16,643 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 259 transitions, 3175 flow [2024-06-20 17:20:16,643 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) [2024-06-20 17:20:16,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:16,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:16,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:20:16,643 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:16,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1015362184, now seen corresponding path program 4 times [2024-06-20 17:20:16,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069537713] [2024-06-20 17:20:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:16,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:17,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:17,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069537713] [2024-06-20 17:20:17,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069537713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:17,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:17,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:17,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395631227] [2024-06-20 17:20:17,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:17,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:17,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:17,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:17,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:17,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 259 transitions, 3175 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) [2024-06-20 17:20:17,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:17,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:17,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:18,412 INFO L124 PetriNetUnfolderBase]: 2967/4571 cut-off events. [2024-06-20 17:20:18,413 INFO L125 PetriNetUnfolderBase]: For 330127/330149 co-relation queries the response was YES. [2024-06-20 17:20:18,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36436 conditions, 4571 events. 2967/4571 cut-off events. For 330127/330149 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24296 event pairs, 548 based on Foata normal form. 24/4590 useless extension candidates. Maximal degree in co-relation 36331. Up to 2602 conditions per place. [2024-06-20 17:20:18,460 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 197 selfloop transitions, 103 changer transitions 0/303 dead transitions. [2024-06-20 17:20:18,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 303 transitions, 4209 flow [2024-06-20 17:20:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:20:18,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-20 17:20:18,462 INFO L175 Difference]: Start difference. First operand has 219 places, 259 transitions, 3175 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:20:18,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 303 transitions, 4209 flow [2024-06-20 17:20:18,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 303 transitions, 4069 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:18,812 INFO L231 Difference]: Finished difference. Result has 223 places, 261 transitions, 3313 flow [2024-06-20 17:20:18,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3313, PETRI_PLACES=223, PETRI_TRANSITIONS=261} [2024-06-20 17:20:18,812 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-20 17:20:18,812 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 261 transitions, 3313 flow [2024-06-20 17:20:18,813 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) [2024-06-20 17:20:18,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:18,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:18,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:20:18,813 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:18,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:18,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1281268714, now seen corresponding path program 5 times [2024-06-20 17:20:18,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:18,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130654705] [2024-06-20 17:20:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:18,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:19,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:19,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130654705] [2024-06-20 17:20:19,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130654705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:19,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:19,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:20:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958000672] [2024-06-20 17:20:19,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:19,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:20:19,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:20:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:20:20,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:20,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 261 transitions, 3313 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:20,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:20,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:20,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:21,106 INFO L124 PetriNetUnfolderBase]: 2992/4618 cut-off events. [2024-06-20 17:20:21,106 INFO L125 PetriNetUnfolderBase]: For 336964/336986 co-relation queries the response was YES. [2024-06-20 17:20:21,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36732 conditions, 4618 events. 2992/4618 cut-off events. For 336964/336986 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24784 event pairs, 634 based on Foata normal form. 28/4641 useless extension candidates. Maximal degree in co-relation 36625. Up to 3744 conditions per place. [2024-06-20 17:20:21,152 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 205 selfloop transitions, 94 changer transitions 0/302 dead transitions. [2024-06-20 17:20:21,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 302 transitions, 4077 flow [2024-06-20 17:20:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:20:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:20:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-20 17:20:21,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-20 17:20:21,153 INFO L175 Difference]: Start difference. First operand has 223 places, 261 transitions, 3313 flow. Second operand 10 states and 169 transitions. [2024-06-20 17:20:21,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 302 transitions, 4077 flow [2024-06-20 17:20:21,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 302 transitions, 3940 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:21,500 INFO L231 Difference]: Finished difference. Result has 228 places, 262 transitions, 3402 flow [2024-06-20 17:20:21,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3402, PETRI_PLACES=228, PETRI_TRANSITIONS=262} [2024-06-20 17:20:21,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-20 17:20:21,501 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 262 transitions, 3402 flow [2024-06-20 17:20:21,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:21,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:21,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:21,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:20:21,502 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)] === [2024-06-20 17:20:21,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:21,503 INFO L85 PathProgramCache]: Analyzing trace with hash 243724276, now seen corresponding path program 7 times [2024-06-20 17:20:21,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:21,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122871417] [2024-06-20 17:20:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:21,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:22,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:22,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122871417] [2024-06-20 17:20:22,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122871417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:22,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:22,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:20:22,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17293607] [2024-06-20 17:20:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:22,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:20:22,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:20:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:20:22,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:22,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 262 transitions, 3402 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:22,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:22,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:22,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:23,776 INFO L124 PetriNetUnfolderBase]: 3009/4645 cut-off events. [2024-06-20 17:20:23,777 INFO L125 PetriNetUnfolderBase]: For 327563/327585 co-relation queries the response was YES. [2024-06-20 17:20:23,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37359 conditions, 4645 events. 3009/4645 cut-off events. For 327563/327585 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25026 event pairs, 664 based on Foata normal form. 12/4652 useless extension candidates. Maximal degree in co-relation 37250. Up to 4232 conditions per place. [2024-06-20 17:20:23,824 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 228 selfloop transitions, 65 changer transitions 0/296 dead transitions. [2024-06-20 17:20:23,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 296 transitions, 4144 flow [2024-06-20 17:20:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:20:23,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:20:23,826 INFO L175 Difference]: Start difference. First operand has 228 places, 262 transitions, 3402 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:20:23,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 296 transitions, 4144 flow [2024-06-20 17:20:24,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 296 transitions, 3954 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:20:24,223 INFO L231 Difference]: Finished difference. Result has 229 places, 264 transitions, 3409 flow [2024-06-20 17:20:24,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3409, PETRI_PLACES=229, PETRI_TRANSITIONS=264} [2024-06-20 17:20:24,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-20 17:20:24,224 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 264 transitions, 3409 flow [2024-06-20 17:20:24,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:24,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:24,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:24,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:20:24,225 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)] === [2024-06-20 17:20:24,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:24,225 INFO L85 PathProgramCache]: Analyzing trace with hash 243730228, now seen corresponding path program 6 times [2024-06-20 17:20:24,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:24,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953126906] [2024-06-20 17:20:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:25,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:25,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953126906] [2024-06-20 17:20:25,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953126906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:25,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:25,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:20:25,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941087245] [2024-06-20 17:20:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:25,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:20:25,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:20:25,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:20:25,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:25,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 264 transitions, 3409 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:25,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:25,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:25,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:26,436 INFO L124 PetriNetUnfolderBase]: 3084/4770 cut-off events. [2024-06-20 17:20:26,436 INFO L125 PetriNetUnfolderBase]: For 362607/362629 co-relation queries the response was YES. [2024-06-20 17:20:26,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38224 conditions, 4770 events. 3084/4770 cut-off events. For 362607/362629 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25889 event pairs, 659 based on Foata normal form. 28/4793 useless extension candidates. Maximal degree in co-relation 38114. Up to 4001 conditions per place. [2024-06-20 17:20:26,491 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 214 selfloop transitions, 89 changer transitions 0/306 dead transitions. [2024-06-20 17:20:26,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 306 transitions, 4195 flow [2024-06-20 17:20:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:20:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:20:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 17:20:26,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-20 17:20:26,493 INFO L175 Difference]: Start difference. First operand has 229 places, 264 transitions, 3409 flow. Second operand 10 states and 173 transitions. [2024-06-20 17:20:26,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 306 transitions, 4195 flow [2024-06-20 17:20:26,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 306 transitions, 4013 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:26,890 INFO L231 Difference]: Finished difference. Result has 233 places, 265 transitions, 3453 flow [2024-06-20 17:20:26,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3453, PETRI_PLACES=233, PETRI_TRANSITIONS=265} [2024-06-20 17:20:26,890 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 17:20:26,890 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 265 transitions, 3453 flow [2024-06-20 17:20:26,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:26,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:26,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:26,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:20:26,891 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)] === [2024-06-20 17:20:26,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash 238217746, now seen corresponding path program 8 times [2024-06-20 17:20:26,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897613806] [2024-06-20 17:20:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:28,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:28,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897613806] [2024-06-20 17:20:28,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897613806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:28,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:20:28,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421994632] [2024-06-20 17:20:28,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:28,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:20:28,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:28,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:20:28,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:20:28,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:28,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 265 transitions, 3453 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:28,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:28,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:28,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:29,086 INFO L124 PetriNetUnfolderBase]: 3076/4758 cut-off events. [2024-06-20 17:20:29,086 INFO L125 PetriNetUnfolderBase]: For 348063/348085 co-relation queries the response was YES. [2024-06-20 17:20:29,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38170 conditions, 4758 events. 3076/4758 cut-off events. For 348063/348085 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25838 event pairs, 652 based on Foata normal form. 12/4765 useless extension candidates. Maximal degree in co-relation 38059. Up to 4124 conditions per place. [2024-06-20 17:20:29,138 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 203 selfloop transitions, 93 changer transitions 0/299 dead transitions. [2024-06-20 17:20:29,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 299 transitions, 4207 flow [2024-06-20 17:20:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:20:29,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:20:29,140 INFO L175 Difference]: Start difference. First operand has 233 places, 265 transitions, 3453 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:20:29,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 299 transitions, 4207 flow [2024-06-20 17:20:29,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 299 transitions, 4015 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:20:29,608 INFO L231 Difference]: Finished difference. Result has 234 places, 267 transitions, 3520 flow [2024-06-20 17:20:29,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3520, PETRI_PLACES=234, PETRI_TRANSITIONS=267} [2024-06-20 17:20:29,608 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-20 17:20:29,609 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 267 transitions, 3520 flow [2024-06-20 17:20:29,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:29,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:29,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:29,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:20:29,609 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:29,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash 238214026, now seen corresponding path program 9 times [2024-06-20 17:20:29,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:29,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461673971] [2024-06-20 17:20:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:29,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:30,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:30,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461673971] [2024-06-20 17:20:30,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461673971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:30,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:30,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:20:30,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15452367] [2024-06-20 17:20:30,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:30,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:20:30,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:20:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:20:30,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:30,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 267 transitions, 3520 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:30,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:30,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:30,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:31,799 INFO L124 PetriNetUnfolderBase]: 3143/4871 cut-off events. [2024-06-20 17:20:31,799 INFO L125 PetriNetUnfolderBase]: For 355057/355079 co-relation queries the response was YES. [2024-06-20 17:20:31,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38566 conditions, 4871 events. 3143/4871 cut-off events. For 355057/355079 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26686 event pairs, 667 based on Foata normal form. 12/4878 useless extension candidates. Maximal degree in co-relation 38454. Up to 3920 conditions per place. [2024-06-20 17:20:31,852 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 204 selfloop transitions, 101 changer transitions 0/308 dead transitions. [2024-06-20 17:20:31,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 308 transitions, 4364 flow [2024-06-20 17:20:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:20:31,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-20 17:20:31,853 INFO L175 Difference]: Start difference. First operand has 234 places, 267 transitions, 3520 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:20:31,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 308 transitions, 4364 flow [2024-06-20 17:20:32,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 308 transitions, 4125 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:32,304 INFO L231 Difference]: Finished difference. Result has 237 places, 272 transitions, 3621 flow [2024-06-20 17:20:32,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3281, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3621, PETRI_PLACES=237, PETRI_TRANSITIONS=272} [2024-06-20 17:20:32,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-20 17:20:32,305 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 272 transitions, 3621 flow [2024-06-20 17:20:32,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:32,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:32,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:32,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:20:32,305 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:32,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:32,305 INFO L85 PathProgramCache]: Analyzing trace with hash 243939478, now seen corresponding path program 7 times [2024-06-20 17:20:32,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:32,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564251368] [2024-06-20 17:20:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:32,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:33,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:33,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564251368] [2024-06-20 17:20:33,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564251368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:33,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:33,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:33,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11367143] [2024-06-20 17:20:33,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:33,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:33,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:33,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:33,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:33,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:33,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 272 transitions, 3621 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) [2024-06-20 17:20:33,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:33,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:33,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:34,193 INFO L124 PetriNetUnfolderBase]: 3201/4969 cut-off events. [2024-06-20 17:20:34,193 INFO L125 PetriNetUnfolderBase]: For 386997/387019 co-relation queries the response was YES. [2024-06-20 17:20:34,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39526 conditions, 4969 events. 3201/4969 cut-off events. For 386997/387019 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27341 event pairs, 675 based on Foata normal form. 24/4988 useless extension candidates. Maximal degree in co-relation 39412. Up to 3781 conditions per place. [2024-06-20 17:20:34,246 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 220 selfloop transitions, 91 changer transitions 0/314 dead transitions. [2024-06-20 17:20:34,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 314 transitions, 4653 flow [2024-06-20 17:20:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:20:34,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-20 17:20:34,248 INFO L175 Difference]: Start difference. First operand has 237 places, 272 transitions, 3621 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:20:34,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 314 transitions, 4653 flow [2024-06-20 17:20:34,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 314 transitions, 4465 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:34,760 INFO L231 Difference]: Finished difference. Result has 241 places, 273 transitions, 3659 flow [2024-06-20 17:20:34,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3435, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3659, PETRI_PLACES=241, PETRI_TRANSITIONS=273} [2024-06-20 17:20:34,761 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 17:20:34,761 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 273 transitions, 3659 flow [2024-06-20 17:20:34,762 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) [2024-06-20 17:20:34,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:34,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:34,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:20:34,762 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:34,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash 238367848, now seen corresponding path program 8 times [2024-06-20 17:20:34,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:34,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108654831] [2024-06-20 17:20:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:34,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:35,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:35,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108654831] [2024-06-20 17:20:35,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108654831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:35,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:35,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:20:35,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568541947] [2024-06-20 17:20:35,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:35,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:20:35,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:20:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:20:35,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:35,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 273 transitions, 3659 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:35,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:35,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:35,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:36,972 INFO L124 PetriNetUnfolderBase]: 3226/5016 cut-off events. [2024-06-20 17:20:36,972 INFO L125 PetriNetUnfolderBase]: For 393592/393614 co-relation queries the response was YES. [2024-06-20 17:20:37,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39685 conditions, 5016 events. 3226/5016 cut-off events. For 393592/393614 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27798 event pairs, 691 based on Foata normal form. 28/5039 useless extension candidates. Maximal degree in co-relation 39569. Up to 4262 conditions per place. [2024-06-20 17:20:37,029 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 218 selfloop transitions, 94 changer transitions 0/315 dead transitions. [2024-06-20 17:20:37,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 315 transitions, 4467 flow [2024-06-20 17:20:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:20:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:20:37,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-20 17:20:37,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-20 17:20:37,030 INFO L175 Difference]: Start difference. First operand has 241 places, 273 transitions, 3659 flow. Second operand 10 states and 172 transitions. [2024-06-20 17:20:37,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 315 transitions, 4467 flow [2024-06-20 17:20:37,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 315 transitions, 4113 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-20 17:20:37,742 INFO L231 Difference]: Finished difference. Result has 242 places, 274 transitions, 3543 flow [2024-06-20 17:20:37,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3543, PETRI_PLACES=242, PETRI_TRANSITIONS=274} [2024-06-20 17:20:37,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-20 17:20:37,743 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 274 transitions, 3543 flow [2024-06-20 17:20:37,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:37,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:37,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:37,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:20:37,743 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:37,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:37,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1718864749, now seen corresponding path program 2 times [2024-06-20 17:20:37,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:37,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960863964] [2024-06-20 17:20:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:37,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:38,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:38,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960863964] [2024-06-20 17:20:38,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960863964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:38,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:38,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:38,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49635903] [2024-06-20 17:20:38,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:38,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:38,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:38,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:38,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:38,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:38,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 274 transitions, 3543 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) [2024-06-20 17:20:38,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:38,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:38,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:39,589 INFO L124 PetriNetUnfolderBase]: 3236/5024 cut-off events. [2024-06-20 17:20:39,589 INFO L125 PetriNetUnfolderBase]: For 371914/371918 co-relation queries the response was YES. [2024-06-20 17:20:39,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39003 conditions, 5024 events. 3236/5024 cut-off events. For 371914/371918 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27938 event pairs, 760 based on Foata normal form. 6/5029 useless extension candidates. Maximal degree in co-relation 38888. Up to 4960 conditions per place. [2024-06-20 17:20:39,762 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 263 selfloop transitions, 27 changer transitions 0/293 dead transitions. [2024-06-20 17:20:39,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 293 transitions, 4221 flow [2024-06-20 17:20:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:20:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:20:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-20 17:20:39,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-20 17:20:39,763 INFO L175 Difference]: Start difference. First operand has 242 places, 274 transitions, 3543 flow. Second operand 5 states and 89 transitions. [2024-06-20 17:20:39,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 293 transitions, 4221 flow [2024-06-20 17:20:40,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 293 transitions, 4023 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 17:20:40,246 INFO L231 Difference]: Finished difference. Result has 239 places, 277 transitions, 3469 flow [2024-06-20 17:20:40,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3469, PETRI_PLACES=239, PETRI_TRANSITIONS=277} [2024-06-20 17:20:40,247 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-20 17:20:40,247 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 277 transitions, 3469 flow [2024-06-20 17:20:40,247 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) [2024-06-20 17:20:40,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:40,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:40,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:20:40,247 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:40,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1144714577, now seen corresponding path program 3 times [2024-06-20 17:20:40,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:40,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924311020] [2024-06-20 17:20:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:40,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:40,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924311020] [2024-06-20 17:20:40,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924311020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:40,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:40,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:40,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612196269] [2024-06-20 17:20:40,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:40,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:40,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:40,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:40,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:41,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:41,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 277 transitions, 3469 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) [2024-06-20 17:20:41,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:41,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:41,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:42,159 INFO L124 PetriNetUnfolderBase]: 3230/5016 cut-off events. [2024-06-20 17:20:42,159 INFO L125 PetriNetUnfolderBase]: For 376870/376874 co-relation queries the response was YES. [2024-06-20 17:20:42,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38549 conditions, 5016 events. 3230/5016 cut-off events. For 376870/376874 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27900 event pairs, 759 based on Foata normal form. 6/5021 useless extension candidates. Maximal degree in co-relation 38433. Up to 4938 conditions per place. [2024-06-20 17:20:42,203 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 259 selfloop transitions, 33 changer transitions 0/295 dead transitions. [2024-06-20 17:20:42,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 295 transitions, 4115 flow [2024-06-20 17:20:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:20:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:20:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 17:20:42,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-20 17:20:42,204 INFO L175 Difference]: Start difference. First operand has 239 places, 277 transitions, 3469 flow. Second operand 6 states and 101 transitions. [2024-06-20 17:20:42,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 295 transitions, 4115 flow [2024-06-20 17:20:42,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 295 transitions, 4041 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 17:20:42,692 INFO L231 Difference]: Finished difference. Result has 242 places, 277 transitions, 3472 flow [2024-06-20 17:20:42,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3472, PETRI_PLACES=242, PETRI_TRANSITIONS=277} [2024-06-20 17:20:42,693 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-20 17:20:42,693 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 277 transitions, 3472 flow [2024-06-20 17:20:42,693 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) [2024-06-20 17:20:42,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:42,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:42,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:20:42,693 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:42,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:42,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1183685751, now seen corresponding path program 1 times [2024-06-20 17:20:42,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:42,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156533793] [2024-06-20 17:20:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:42,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:43,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156533793] [2024-06-20 17:20:43,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156533793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:43,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:43,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:20:43,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566879042] [2024-06-20 17:20:43,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:43,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:20:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:20:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:20:43,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:20:43,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 277 transitions, 3472 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:43,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:43,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:20:43,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:44,487 INFO L124 PetriNetUnfolderBase]: 3131/4929 cut-off events. [2024-06-20 17:20:44,487 INFO L125 PetriNetUnfolderBase]: For 389593/389593 co-relation queries the response was YES. [2024-06-20 17:20:44,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38351 conditions, 4929 events. 3131/4929 cut-off events. For 389593/389593 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27861 event pairs, 750 based on Foata normal form. 3/4928 useless extension candidates. Maximal degree in co-relation 38234. Up to 4722 conditions per place. [2024-06-20 17:20:44,537 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 250 selfloop transitions, 25 changer transitions 0/303 dead transitions. [2024-06-20 17:20:44,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 303 transitions, 4302 flow [2024-06-20 17:20:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:20:44,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-20 17:20:44,538 INFO L175 Difference]: Start difference. First operand has 242 places, 277 transitions, 3472 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:20:44,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 303 transitions, 4302 flow [2024-06-20 17:20:45,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 303 transitions, 4220 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:45,023 INFO L231 Difference]: Finished difference. Result has 244 places, 283 transitions, 3554 flow [2024-06-20 17:20:45,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3554, PETRI_PLACES=244, PETRI_TRANSITIONS=283} [2024-06-20 17:20:45,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-20 17:20:45,024 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 283 transitions, 3554 flow [2024-06-20 17:20:45,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:45,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:45,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:45,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:20:45,024 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)] === [2024-06-20 17:20:45,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2039034921, now seen corresponding path program 2 times [2024-06-20 17:20:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:45,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147715201] [2024-06-20 17:20:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:45,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:45,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:45,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147715201] [2024-06-20 17:20:45,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147715201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:45,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:45,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:20:45,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203986267] [2024-06-20 17:20:45,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:45,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:20:45,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:20:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:20:45,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:20:45,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 283 transitions, 3554 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:45,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:45,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:20:45,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:46,971 INFO L124 PetriNetUnfolderBase]: 3161/4971 cut-off events. [2024-06-20 17:20:46,971 INFO L125 PetriNetUnfolderBase]: For 394006/394006 co-relation queries the response was YES. [2024-06-20 17:20:47,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38847 conditions, 4971 events. 3161/4971 cut-off events. For 394006/394006 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28132 event pairs, 749 based on Foata normal form. 3/4970 useless extension candidates. Maximal degree in co-relation 38730. Up to 4774 conditions per place. [2024-06-20 17:20:47,034 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 254 selfloop transitions, 25 changer transitions 0/307 dead transitions. [2024-06-20 17:20:47,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 307 transitions, 4263 flow [2024-06-20 17:20:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 17:20:47,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-20 17:20:47,036 INFO L175 Difference]: Start difference. First operand has 244 places, 283 transitions, 3554 flow. Second operand 7 states and 113 transitions. [2024-06-20 17:20:47,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 307 transitions, 4263 flow [2024-06-20 17:20:47,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 307 transitions, 4182 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 17:20:47,764 INFO L231 Difference]: Finished difference. Result has 248 places, 291 transitions, 3637 flow [2024-06-20 17:20:47,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3637, PETRI_PLACES=248, PETRI_TRANSITIONS=291} [2024-06-20 17:20:47,764 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-20 17:20:47,765 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 291 transitions, 3637 flow [2024-06-20 17:20:47,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:47,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:47,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:47,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:20:47,765 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)] === [2024-06-20 17:20:47,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1144530251, now seen corresponding path program 3 times [2024-06-20 17:20:47,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:47,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366668871] [2024-06-20 17:20:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:47,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:48,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:48,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366668871] [2024-06-20 17:20:48,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366668871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:48,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:48,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:20:48,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359540988] [2024-06-20 17:20:48,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:48,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:20:48,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:48,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:20:48,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:20:48,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:20:48,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 291 transitions, 3637 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:48,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:48,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:20:48,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:49,638 INFO L124 PetriNetUnfolderBase]: 3157/4964 cut-off events. [2024-06-20 17:20:49,638 INFO L125 PetriNetUnfolderBase]: For 397134/397134 co-relation queries the response was YES. [2024-06-20 17:20:49,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38793 conditions, 4964 events. 3157/4964 cut-off events. For 397134/397134 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28044 event pairs, 750 based on Foata normal form. 3/4963 useless extension candidates. Maximal degree in co-relation 38674. Up to 4764 conditions per place. [2024-06-20 17:20:49,697 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 257 selfloop transitions, 23 changer transitions 0/308 dead transitions. [2024-06-20 17:20:49,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 308 transitions, 4251 flow [2024-06-20 17:20:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:20:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:20:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 17:20:49,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 17:20:49,698 INFO L175 Difference]: Start difference. First operand has 248 places, 291 transitions, 3637 flow. Second operand 6 states and 104 transitions. [2024-06-20 17:20:49,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 308 transitions, 4251 flow [2024-06-20 17:20:50,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 308 transitions, 4136 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 17:20:50,292 INFO L231 Difference]: Finished difference. Result has 250 places, 291 transitions, 3579 flow [2024-06-20 17:20:50,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3579, PETRI_PLACES=250, PETRI_TRANSITIONS=291} [2024-06-20 17:20:50,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-20 17:20:50,292 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 291 transitions, 3579 flow [2024-06-20 17:20:50,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:50,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:50,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:50,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:20:50,293 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)] === [2024-06-20 17:20:50,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1144283987, now seen corresponding path program 1 times [2024-06-20 17:20:50,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:50,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465310258] [2024-06-20 17:20:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:50,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:51,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:51,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465310258] [2024-06-20 17:20:51,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465310258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:51,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:51,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:51,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575896252] [2024-06-20 17:20:51,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:51,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:51,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:51,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:51,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:51,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:51,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 291 transitions, 3579 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) [2024-06-20 17:20:51,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:51,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:51,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:52,325 INFO L124 PetriNetUnfolderBase]: 3269/5075 cut-off events. [2024-06-20 17:20:52,325 INFO L125 PetriNetUnfolderBase]: For 402607/402607 co-relation queries the response was YES. [2024-06-20 17:20:52,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39307 conditions, 5075 events. 3269/5075 cut-off events. For 402607/402607 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28142 event pairs, 788 based on Foata normal form. 2/5076 useless extension candidates. Maximal degree in co-relation 39187. Up to 5038 conditions per place. [2024-06-20 17:20:52,389 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 286 selfloop transitions, 13 changer transitions 0/302 dead transitions. [2024-06-20 17:20:52,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 302 transitions, 4229 flow [2024-06-20 17:20:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:20:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:20:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-20 17:20:52,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:20:52,391 INFO L175 Difference]: Start difference. First operand has 250 places, 291 transitions, 3579 flow. Second operand 5 states and 80 transitions. [2024-06-20 17:20:52,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 302 transitions, 4229 flow [2024-06-20 17:20:53,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 302 transitions, 4172 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:53,013 INFO L231 Difference]: Finished difference. Result has 250 places, 293 transitions, 3583 flow [2024-06-20 17:20:53,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3583, PETRI_PLACES=250, PETRI_TRANSITIONS=293} [2024-06-20 17:20:53,014 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-20 17:20:53,014 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 293 transitions, 3583 flow [2024-06-20 17:20:53,014 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) [2024-06-20 17:20:53,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:53,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:53,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:20:53,015 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:53,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash 534840141, now seen corresponding path program 1 times [2024-06-20 17:20:53,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:53,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094340952] [2024-06-20 17:20:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:53,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:54,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:54,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094340952] [2024-06-20 17:20:54,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094340952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:54,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:54,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:20:54,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399477181] [2024-06-20 17:20:54,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:54,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:20:54,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:54,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:20:54,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:20:54,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:54,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 293 transitions, 3583 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:54,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:54,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:54,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:55,674 INFO L124 PetriNetUnfolderBase]: 3310/5142 cut-off events. [2024-06-20 17:20:55,674 INFO L125 PetriNetUnfolderBase]: For 430900/430904 co-relation queries the response was YES. [2024-06-20 17:20:55,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39922 conditions, 5142 events. 3310/5142 cut-off events. For 430900/430904 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28366 event pairs, 607 based on Foata normal form. 16/5157 useless extension candidates. Maximal degree in co-relation 39801. Up to 4830 conditions per place. [2024-06-20 17:20:55,739 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 304 selfloop transitions, 30 changer transitions 0/337 dead transitions. [2024-06-20 17:20:55,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 337 transitions, 4419 flow [2024-06-20 17:20:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:20:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:20:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-20 17:20:55,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-20 17:20:55,740 INFO L175 Difference]: Start difference. First operand has 250 places, 293 transitions, 3583 flow. Second operand 10 states and 159 transitions. [2024-06-20 17:20:55,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 337 transitions, 4419 flow [2024-06-20 17:20:56,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 337 transitions, 4374 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 17:20:56,483 INFO L231 Difference]: Finished difference. Result has 257 places, 294 transitions, 3638 flow [2024-06-20 17:20:56,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3638, PETRI_PLACES=257, PETRI_TRANSITIONS=294} [2024-06-20 17:20:56,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-20 17:20:56,484 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 294 transitions, 3638 flow [2024-06-20 17:20:56,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:56,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:56,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:56,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:20:56,484 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:56,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:56,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1594217289, now seen corresponding path program 2 times [2024-06-20 17:20:56,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:56,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307355483] [2024-06-20 17:20:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:56,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:57,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:57,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307355483] [2024-06-20 17:20:57,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307355483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:57,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:57,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:20:57,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155373661] [2024-06-20 17:20:57,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:57,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:20:57,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:57,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:20:57,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:20:58,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:20:58,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 294 transitions, 3638 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:58,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:58,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:20:58,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:59,262 INFO L124 PetriNetUnfolderBase]: 3351/5213 cut-off events. [2024-06-20 17:20:59,263 INFO L125 PetriNetUnfolderBase]: For 444042/444046 co-relation queries the response was YES. [2024-06-20 17:20:59,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40592 conditions, 5213 events. 3351/5213 cut-off events. For 444042/444046 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29139 event pairs, 756 based on Foata normal form. 16/5228 useless extension candidates. Maximal degree in co-relation 40470. Up to 4936 conditions per place. [2024-06-20 17:20:59,321 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 299 selfloop transitions, 36 changer transitions 0/338 dead transitions. [2024-06-20 17:20:59,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 338 transitions, 4472 flow [2024-06-20 17:20:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:20:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:20:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-20 17:20:59,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-20 17:20:59,323 INFO L175 Difference]: Start difference. First operand has 257 places, 294 transitions, 3638 flow. Second operand 10 states and 161 transitions. [2024-06-20 17:20:59,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 338 transitions, 4472 flow [2024-06-20 17:21:00,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 338 transitions, 4390 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:00,078 INFO L231 Difference]: Finished difference. Result has 259 places, 295 transitions, 3660 flow [2024-06-20 17:21:00,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3660, PETRI_PLACES=259, PETRI_TRANSITIONS=295} [2024-06-20 17:21:00,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-20 17:21:00,078 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 295 transitions, 3660 flow [2024-06-20 17:21:00,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:00,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:00,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:00,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:21:00,079 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:00,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:00,079 INFO L85 PathProgramCache]: Analyzing trace with hash -982521621, now seen corresponding path program 3 times [2024-06-20 17:21:00,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:00,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317300376] [2024-06-20 17:21:00,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:00,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:01,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:01,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317300376] [2024-06-20 17:21:01,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317300376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:01,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:01,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:01,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455837808] [2024-06-20 17:21:01,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:01,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:01,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:01,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:01,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 295 transitions, 3660 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) [2024-06-20 17:21:01,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:01,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:01,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:02,549 INFO L124 PetriNetUnfolderBase]: 3392/5286 cut-off events. [2024-06-20 17:21:02,549 INFO L125 PetriNetUnfolderBase]: For 460394/460396 co-relation queries the response was YES. [2024-06-20 17:21:02,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41086 conditions, 5286 events. 3392/5286 cut-off events. For 460394/460396 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 29723 event pairs, 758 based on Foata normal form. 14/5299 useless extension candidates. Maximal degree in co-relation 40963. Up to 4792 conditions per place. [2024-06-20 17:21:02,610 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 274 selfloop transitions, 55 changer transitions 0/332 dead transitions. [2024-06-20 17:21:02,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 332 transitions, 4475 flow [2024-06-20 17:21:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:21:02,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 17:21:02,611 INFO L175 Difference]: Start difference. First operand has 259 places, 295 transitions, 3660 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:21:02,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 332 transitions, 4475 flow [2024-06-20 17:21:03,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 332 transitions, 4391 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:03,214 INFO L231 Difference]: Finished difference. Result has 261 places, 297 transitions, 3763 flow [2024-06-20 17:21:03,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3576, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3763, PETRI_PLACES=261, PETRI_TRANSITIONS=297} [2024-06-20 17:21:03,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-20 17:21:03,215 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 297 transitions, 3763 flow [2024-06-20 17:21:03,215 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) [2024-06-20 17:21:03,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:03,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:03,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:21:03,215 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:03,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash 3338303, now seen corresponding path program 1 times [2024-06-20 17:21:03,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:03,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984312699] [2024-06-20 17:21:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:03,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:04,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:04,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984312699] [2024-06-20 17:21:04,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984312699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:04,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:04,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:04,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141249194] [2024-06-20 17:21:04,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:04,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:04,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:04,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:04,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:04,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:04,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 297 transitions, 3763 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) [2024-06-20 17:21:04,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:04,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:04,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:05,512 INFO L124 PetriNetUnfolderBase]: 3432/5340 cut-off events. [2024-06-20 17:21:05,512 INFO L125 PetriNetUnfolderBase]: For 459566/459570 co-relation queries the response was YES. [2024-06-20 17:21:05,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41754 conditions, 5340 events. 3432/5340 cut-off events. For 459566/459570 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29979 event pairs, 795 based on Foata normal form. 8/5347 useless extension candidates. Maximal degree in co-relation 41629. Up to 5092 conditions per place. [2024-06-20 17:21:05,574 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 272 selfloop transitions, 68 changer transitions 0/343 dead transitions. [2024-06-20 17:21:05,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 343 transitions, 4861 flow [2024-06-20 17:21:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:21:05,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:21:05,575 INFO L175 Difference]: Start difference. First operand has 261 places, 297 transitions, 3763 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:21:05,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 343 transitions, 4861 flow [2024-06-20 17:21:06,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 343 transitions, 4731 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:06,319 INFO L231 Difference]: Finished difference. Result has 264 places, 313 transitions, 3996 flow [2024-06-20 17:21:06,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3633, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3996, PETRI_PLACES=264, PETRI_TRANSITIONS=313} [2024-06-20 17:21:06,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-20 17:21:06,319 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 313 transitions, 3996 flow [2024-06-20 17:21:06,320 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) [2024-06-20 17:21:06,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:06,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:06,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:21:06,320 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:06,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:06,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1001406913, now seen corresponding path program 4 times [2024-06-20 17:21:06,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:06,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141809560] [2024-06-20 17:21:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:06,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:07,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:07,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141809560] [2024-06-20 17:21:07,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141809560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:07,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:07,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:21:07,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599832626] [2024-06-20 17:21:07,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:07,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:21:07,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:07,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:21:07,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:21:07,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:07,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 313 transitions, 3996 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:07,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:07,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:07,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:08,988 INFO L124 PetriNetUnfolderBase]: 3473/5413 cut-off events. [2024-06-20 17:21:08,988 INFO L125 PetriNetUnfolderBase]: For 487711/487713 co-relation queries the response was YES. [2024-06-20 17:21:09,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42453 conditions, 5413 events. 3473/5413 cut-off events. For 487711/487713 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30515 event pairs, 779 based on Foata normal form. 14/5426 useless extension candidates. Maximal degree in co-relation 42326. Up to 4862 conditions per place. [2024-06-20 17:21:09,054 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 301 selfloop transitions, 54 changer transitions 0/358 dead transitions. [2024-06-20 17:21:09,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 358 transitions, 4890 flow [2024-06-20 17:21:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 17:21:09,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-20 17:21:09,055 INFO L175 Difference]: Start difference. First operand has 264 places, 313 transitions, 3996 flow. Second operand 10 states and 168 transitions. [2024-06-20 17:21:09,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 358 transitions, 4890 flow [2024-06-20 17:21:10,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 358 transitions, 4803 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:10,049 INFO L231 Difference]: Finished difference. Result has 271 places, 314 transitions, 4051 flow [2024-06-20 17:21:10,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3909, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4051, PETRI_PLACES=271, PETRI_TRANSITIONS=314} [2024-06-20 17:21:10,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-20 17:21:10,050 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 314 transitions, 4051 flow [2024-06-20 17:21:10,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:10,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:10,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:10,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:21:10,050 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:10,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:10,051 INFO L85 PathProgramCache]: Analyzing trace with hash 830704483, now seen corresponding path program 5 times [2024-06-20 17:21:10,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:10,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766396162] [2024-06-20 17:21:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:10,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:11,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:11,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766396162] [2024-06-20 17:21:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766396162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:11,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:21:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790882775] [2024-06-20 17:21:11,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:21:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:21:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:21:11,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:11,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 314 transitions, 4051 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:11,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:11,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:11,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:12,604 INFO L124 PetriNetUnfolderBase]: 3453/5381 cut-off events. [2024-06-20 17:21:12,604 INFO L125 PetriNetUnfolderBase]: For 478492/478494 co-relation queries the response was YES. [2024-06-20 17:21:12,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41929 conditions, 5381 events. 3453/5381 cut-off events. For 478492/478494 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30292 event pairs, 747 based on Foata normal form. 14/5394 useless extension candidates. Maximal degree in co-relation 41800. Up to 4846 conditions per place. [2024-06-20 17:21:12,667 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 293 selfloop transitions, 53 changer transitions 0/349 dead transitions. [2024-06-20 17:21:12,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 349 transitions, 4853 flow [2024-06-20 17:21:12,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:21:12,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 17:21:12,668 INFO L175 Difference]: Start difference. First operand has 271 places, 314 transitions, 4051 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:21:12,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 349 transitions, 4853 flow [2024-06-20 17:21:13,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 349 transitions, 4727 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:13,603 INFO L231 Difference]: Finished difference. Result has 272 places, 314 transitions, 4041 flow [2024-06-20 17:21:13,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4041, PETRI_PLACES=272, PETRI_TRANSITIONS=314} [2024-06-20 17:21:13,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-20 17:21:13,604 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 314 transitions, 4041 flow [2024-06-20 17:21:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:13,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:13,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:13,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:21:13,605 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)] === [2024-06-20 17:21:13,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash 12603893, now seen corresponding path program 2 times [2024-06-20 17:21:13,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:13,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299826342] [2024-06-20 17:21:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:13,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:14,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:14,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299826342] [2024-06-20 17:21:14,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299826342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:14,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:14,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:14,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147753756] [2024-06-20 17:21:14,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:14,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:14,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:14,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:14,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:14,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:14,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 314 transitions, 4041 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) [2024-06-20 17:21:14,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:14,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:14,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:15,866 INFO L124 PetriNetUnfolderBase]: 3515/5467 cut-off events. [2024-06-20 17:21:15,867 INFO L125 PetriNetUnfolderBase]: For 485287/485289 co-relation queries the response was YES. [2024-06-20 17:21:15,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42812 conditions, 5467 events. 3515/5467 cut-off events. For 485287/485289 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30835 event pairs, 805 based on Foata normal form. 6/5472 useless extension candidates. Maximal degree in co-relation 42682. Up to 5177 conditions per place. [2024-06-20 17:21:15,924 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 270 selfloop transitions, 77 changer transitions 0/350 dead transitions. [2024-06-20 17:21:15,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 350 transitions, 5232 flow [2024-06-20 17:21:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 17:21:15,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-20 17:21:15,926 INFO L175 Difference]: Start difference. First operand has 272 places, 314 transitions, 4041 flow. Second operand 8 states and 133 transitions. [2024-06-20 17:21:15,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 350 transitions, 5232 flow [2024-06-20 17:21:16,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 350 transitions, 5097 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:16,861 INFO L231 Difference]: Finished difference. Result has 274 places, 325 transitions, 4254 flow [2024-06-20 17:21:16,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3914, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4254, PETRI_PLACES=274, PETRI_TRANSITIONS=325} [2024-06-20 17:21:16,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-20 17:21:16,862 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 325 transitions, 4254 flow [2024-06-20 17:21:16,862 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) [2024-06-20 17:21:16,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:16,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:16,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:21:16,862 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)] === [2024-06-20 17:21:16,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1432301191, now seen corresponding path program 3 times [2024-06-20 17:21:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:16,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573165100] [2024-06-20 17:21:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:16,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:17,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:17,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573165100] [2024-06-20 17:21:17,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573165100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:17,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:17,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:17,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272791962] [2024-06-20 17:21:17,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:17,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:17,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:17,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:17,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:17,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 325 transitions, 4254 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) [2024-06-20 17:21:17,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:17,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:17,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:19,096 INFO L124 PetriNetUnfolderBase]: 3503/5451 cut-off events. [2024-06-20 17:21:19,096 INFO L125 PetriNetUnfolderBase]: For 461289/461291 co-relation queries the response was YES. [2024-06-20 17:21:19,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42221 conditions, 5451 events. 3503/5451 cut-off events. For 461289/461291 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30769 event pairs, 805 based on Foata normal form. 6/5456 useless extension candidates. Maximal degree in co-relation 42089. Up to 5169 conditions per place. [2024-06-20 17:21:19,167 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 278 selfloop transitions, 71 changer transitions 0/352 dead transitions. [2024-06-20 17:21:19,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 352 transitions, 5180 flow [2024-06-20 17:21:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:21:19,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-20 17:21:19,168 INFO L175 Difference]: Start difference. First operand has 274 places, 325 transitions, 4254 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:21:19,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 352 transitions, 5180 flow [2024-06-20 17:21:20,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 352 transitions, 5044 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:20,342 INFO L231 Difference]: Finished difference. Result has 279 places, 325 transitions, 4269 flow [2024-06-20 17:21:20,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4269, PETRI_PLACES=279, PETRI_TRANSITIONS=325} [2024-06-20 17:21:20,342 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-20 17:21:20,342 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 325 transitions, 4269 flow [2024-06-20 17:21:20,342 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) [2024-06-20 17:21:20,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:20,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:20,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:21:20,343 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:20,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:20,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1064808161, now seen corresponding path program 6 times [2024-06-20 17:21:20,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:20,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101711133] [2024-06-20 17:21:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:20,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:21,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:21,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101711133] [2024-06-20 17:21:21,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101711133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:21,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:21,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:21:21,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489486169] [2024-06-20 17:21:21,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:21,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:21:21,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:21:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:21:21,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:21,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 325 transitions, 4269 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:21,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:21,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:21,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:22,987 INFO L124 PetriNetUnfolderBase]: 3483/5423 cut-off events. [2024-06-20 17:21:22,987 INFO L125 PetriNetUnfolderBase]: For 465442/465458 co-relation queries the response was YES. [2024-06-20 17:21:23,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41397 conditions, 5423 events. 3483/5423 cut-off events. For 465442/465458 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30512 event pairs, 699 based on Foata normal form. 18/5436 useless extension candidates. Maximal degree in co-relation 41264. Up to 4600 conditions per place. [2024-06-20 17:21:23,053 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 271 selfloop transitions, 94 changer transitions 0/368 dead transitions. [2024-06-20 17:21:23,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 368 transitions, 5155 flow [2024-06-20 17:21:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-20 17:21:23,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275 [2024-06-20 17:21:23,054 INFO L175 Difference]: Start difference. First operand has 279 places, 325 transitions, 4269 flow. Second operand 10 states and 171 transitions. [2024-06-20 17:21:23,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 368 transitions, 5155 flow [2024-06-20 17:21:24,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 368 transitions, 4984 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:24,154 INFO L231 Difference]: Finished difference. Result has 282 places, 325 transitions, 4292 flow [2024-06-20 17:21:24,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4098, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4292, PETRI_PLACES=282, PETRI_TRANSITIONS=325} [2024-06-20 17:21:24,154 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-20 17:21:24,154 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 325 transitions, 4292 flow [2024-06-20 17:21:24,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:24,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:24,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:24,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:21:24,155 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:24,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:24,155 INFO L85 PathProgramCache]: Analyzing trace with hash -121139669, now seen corresponding path program 7 times [2024-06-20 17:21:24,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:24,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695669512] [2024-06-20 17:21:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:24,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:25,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:25,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695669512] [2024-06-20 17:21:25,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695669512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:25,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:25,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:21:25,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258257295] [2024-06-20 17:21:25,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:25,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:21:25,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:21:25,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:21:25,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:25,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 325 transitions, 4292 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:25,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:25,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:25,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:27,142 INFO L124 PetriNetUnfolderBase]: 3524/5494 cut-off events. [2024-06-20 17:21:27,142 INFO L125 PetriNetUnfolderBase]: For 480142/480158 co-relation queries the response was YES. [2024-06-20 17:21:27,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42108 conditions, 5494 events. 3524/5494 cut-off events. For 480142/480158 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 31052 event pairs, 724 based on Foata normal form. 18/5507 useless extension candidates. Maximal degree in co-relation 41975. Up to 4671 conditions per place. [2024-06-20 17:21:27,205 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 276 selfloop transitions, 90 changer transitions 0/369 dead transitions. [2024-06-20 17:21:27,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 369 transitions, 5210 flow [2024-06-20 17:21:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 17:21:27,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-20 17:21:27,206 INFO L175 Difference]: Start difference. First operand has 282 places, 325 transitions, 4292 flow. Second operand 10 states and 173 transitions. [2024-06-20 17:21:27,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 369 transitions, 5210 flow [2024-06-20 17:21:28,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 369 transitions, 5004 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 17:21:28,263 INFO L231 Difference]: Finished difference. Result has 283 places, 326 transitions, 4304 flow [2024-06-20 17:21:28,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4304, PETRI_PLACES=283, PETRI_TRANSITIONS=326} [2024-06-20 17:21:28,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-20 17:21:28,264 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 326 transitions, 4304 flow [2024-06-20 17:21:28,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:28,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:28,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:28,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:21:28,264 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:28,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1205183645, now seen corresponding path program 8 times [2024-06-20 17:21:28,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:28,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824426428] [2024-06-20 17:21:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:29,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:29,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824426428] [2024-06-20 17:21:29,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824426428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:29,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:29,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:21:29,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551535676] [2024-06-20 17:21:29,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:29,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:21:29,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:21:29,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:21:29,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:29,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 326 transitions, 4304 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:29,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:29,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:29,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:30,827 INFO L124 PetriNetUnfolderBase]: 3504/5462 cut-off events. [2024-06-20 17:21:30,828 INFO L125 PetriNetUnfolderBase]: For 467544/467560 co-relation queries the response was YES. [2024-06-20 17:21:30,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41252 conditions, 5462 events. 3504/5462 cut-off events. For 467544/467560 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30875 event pairs, 726 based on Foata normal form. 18/5475 useless extension candidates. Maximal degree in co-relation 41118. Up to 4893 conditions per place. [2024-06-20 17:21:30,898 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 289 selfloop transitions, 68 changer transitions 0/360 dead transitions. [2024-06-20 17:21:30,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 360 transitions, 5126 flow [2024-06-20 17:21:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:21:30,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:21:30,899 INFO L175 Difference]: Start difference. First operand has 283 places, 326 transitions, 4304 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:21:30,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 360 transitions, 5126 flow [2024-06-20 17:21:32,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 360 transitions, 4924 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:32,154 INFO L231 Difference]: Finished difference. Result has 285 places, 326 transitions, 4246 flow [2024-06-20 17:21:32,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4246, PETRI_PLACES=285, PETRI_TRANSITIONS=326} [2024-06-20 17:21:32,155 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-20 17:21:32,155 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 326 transitions, 4246 flow [2024-06-20 17:21:32,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:32,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:32,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:32,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:21:32,156 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:32,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:32,156 INFO L85 PathProgramCache]: Analyzing trace with hash -291957419, now seen corresponding path program 9 times [2024-06-20 17:21:32,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:32,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036479159] [2024-06-20 17:21:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:32,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:33,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:33,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036479159] [2024-06-20 17:21:33,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036479159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:33,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:33,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:21:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665618738] [2024-06-20 17:21:33,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:33,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:21:33,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:33,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:21:33,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:21:33,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:33,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 326 transitions, 4246 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:33,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:33,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:33,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:34,807 INFO L124 PetriNetUnfolderBase]: 3484/5430 cut-off events. [2024-06-20 17:21:34,807 INFO L125 PetriNetUnfolderBase]: For 451940/451956 co-relation queries the response was YES. [2024-06-20 17:21:34,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40220 conditions, 5430 events. 3484/5430 cut-off events. For 451940/451956 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30573 event pairs, 674 based on Foata normal form. 18/5443 useless extension candidates. Maximal degree in co-relation 40085. Up to 4410 conditions per place. [2024-06-20 17:21:34,876 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 263 selfloop transitions, 102 changer transitions 0/368 dead transitions. [2024-06-20 17:21:34,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 368 transitions, 5004 flow [2024-06-20 17:21:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-20 17:21:34,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275 [2024-06-20 17:21:34,877 INFO L175 Difference]: Start difference. First operand has 285 places, 326 transitions, 4246 flow. Second operand 10 states and 171 transitions. [2024-06-20 17:21:34,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 368 transitions, 5004 flow [2024-06-20 17:21:35,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 368 transitions, 4842 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:35,862 INFO L231 Difference]: Finished difference. Result has 286 places, 325 transitions, 4166 flow [2024-06-20 17:21:35,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4166, PETRI_PLACES=286, PETRI_TRANSITIONS=325} [2024-06-20 17:21:35,862 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-20 17:21:35,862 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 325 transitions, 4166 flow [2024-06-20 17:21:35,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:35,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:35,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:35,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:21:35,863 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)] === [2024-06-20 17:21:35,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:35,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1982325045, now seen corresponding path program 4 times [2024-06-20 17:21:35,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:35,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362309595] [2024-06-20 17:21:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:35,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:36,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:36,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362309595] [2024-06-20 17:21:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362309595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:36,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:36,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:36,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853660824] [2024-06-20 17:21:36,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:36,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:36,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:36,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:36,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:36,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:36,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 325 transitions, 4166 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) [2024-06-20 17:21:36,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:36,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:36,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:37,950 INFO L124 PetriNetUnfolderBase]: 3504/5452 cut-off events. [2024-06-20 17:21:37,950 INFO L125 PetriNetUnfolderBase]: For 434029/434033 co-relation queries the response was YES. [2024-06-20 17:21:38,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40486 conditions, 5452 events. 3504/5452 cut-off events. For 434029/434033 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30797 event pairs, 771 based on Foata normal form. 8/5459 useless extension candidates. Maximal degree in co-relation 40350. Up to 5160 conditions per place. [2024-06-20 17:21:38,018 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 269 selfloop transitions, 84 changer transitions 0/356 dead transitions. [2024-06-20 17:21:38,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 356 transitions, 5151 flow [2024-06-20 17:21:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:21:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:21:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:21:38,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-20 17:21:38,020 INFO L175 Difference]: Start difference. First operand has 286 places, 325 transitions, 4166 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:21:38,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 356 transitions, 5151 flow [2024-06-20 17:21:39,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 356 transitions, 4833 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-20 17:21:39,068 INFO L231 Difference]: Finished difference. Result has 283 places, 328 transitions, 4082 flow [2024-06-20 17:21:39,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3848, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4082, PETRI_PLACES=283, PETRI_TRANSITIONS=328} [2024-06-20 17:21:39,069 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-20 17:21:39,069 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 328 transitions, 4082 flow [2024-06-20 17:21:39,069 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) [2024-06-20 17:21:39,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:39,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:39,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:21:39,069 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)] === [2024-06-20 17:21:39,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1126412585, now seen corresponding path program 5 times [2024-06-20 17:21:39,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:39,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654595845] [2024-06-20 17:21:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:39,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:39,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654595845] [2024-06-20 17:21:39,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654595845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:39,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:39,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:39,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790501117] [2024-06-20 17:21:39,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:39,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:39,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:39,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:39,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:39,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:39,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 328 transitions, 4082 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) [2024-06-20 17:21:39,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:39,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:39,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:41,205 INFO L124 PetriNetUnfolderBase]: 3524/5482 cut-off events. [2024-06-20 17:21:41,205 INFO L125 PetriNetUnfolderBase]: For 444033/444035 co-relation queries the response was YES. [2024-06-20 17:21:41,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39984 conditions, 5482 events. 3524/5482 cut-off events. For 444033/444035 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30975 event pairs, 783 based on Foata normal form. 6/5487 useless extension candidates. Maximal degree in co-relation 39849. Up to 5176 conditions per place. [2024-06-20 17:21:41,266 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 266 selfloop transitions, 84 changer transitions 0/353 dead transitions. [2024-06-20 17:21:41,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 353 transitions, 5045 flow [2024-06-20 17:21:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:21:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:21:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:21:41,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-20 17:21:41,268 INFO L175 Difference]: Start difference. First operand has 283 places, 328 transitions, 4082 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:21:41,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 353 transitions, 5045 flow [2024-06-20 17:21:42,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 353 transitions, 4896 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:42,188 INFO L231 Difference]: Finished difference. Result has 284 places, 331 transitions, 4164 flow [2024-06-20 17:21:42,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3940, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4164, PETRI_PLACES=284, PETRI_TRANSITIONS=331} [2024-06-20 17:21:42,188 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-20 17:21:42,188 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 331 transitions, 4164 flow [2024-06-20 17:21:42,188 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) [2024-06-20 17:21:42,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:42,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:42,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:21:42,189 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)] === [2024-06-20 17:21:42,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:42,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1829420315, now seen corresponding path program 6 times [2024-06-20 17:21:42,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:42,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212961350] [2024-06-20 17:21:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:42,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:43,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:43,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212961350] [2024-06-20 17:21:43,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212961350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:43,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:43,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:43,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989778024] [2024-06-20 17:21:43,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:43,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:43,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:43,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:43,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 331 transitions, 4164 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) [2024-06-20 17:21:43,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:43,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:43,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:44,214 INFO L124 PetriNetUnfolderBase]: 3512/5464 cut-off events. [2024-06-20 17:21:44,214 INFO L125 PetriNetUnfolderBase]: For 422974/422978 co-relation queries the response was YES. [2024-06-20 17:21:44,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39410 conditions, 5464 events. 3512/5464 cut-off events. For 422974/422978 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 30894 event pairs, 781 based on Foata normal form. 8/5471 useless extension candidates. Maximal degree in co-relation 39276. Up to 5274 conditions per place. [2024-06-20 17:21:44,286 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 283 selfloop transitions, 69 changer transitions 0/355 dead transitions. [2024-06-20 17:21:44,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 355 transitions, 4950 flow [2024-06-20 17:21:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:21:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:21:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 17:21:44,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-20 17:21:44,287 INFO L175 Difference]: Start difference. First operand has 284 places, 331 transitions, 4164 flow. Second operand 6 states and 109 transitions. [2024-06-20 17:21:44,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 355 transitions, 4950 flow [2024-06-20 17:21:45,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 355 transitions, 4794 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:45,336 INFO L231 Difference]: Finished difference. Result has 285 places, 331 transitions, 4196 flow [2024-06-20 17:21:45,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4008, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4196, PETRI_PLACES=285, PETRI_TRANSITIONS=331} [2024-06-20 17:21:45,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-20 17:21:45,337 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 331 transitions, 4196 flow [2024-06-20 17:21:45,337 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) [2024-06-20 17:21:45,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:45,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:45,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:21:45,337 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)] === [2024-06-20 17:21:45,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:45,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1960444814, now seen corresponding path program 1 times [2024-06-20 17:21:45,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:45,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215658451] [2024-06-20 17:21:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:45,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:46,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:46,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215658451] [2024-06-20 17:21:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215658451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:46,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:46,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:46,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689385422] [2024-06-20 17:21:46,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:46,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:46,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:21:46,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 331 transitions, 4196 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-20 17:21:46,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:46,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:21:46,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:47,447 INFO L124 PetriNetUnfolderBase]: 3421/5385 cut-off events. [2024-06-20 17:21:47,447 INFO L125 PetriNetUnfolderBase]: For 424199/424199 co-relation queries the response was YES. [2024-06-20 17:21:47,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38920 conditions, 5385 events. 3421/5385 cut-off events. For 424199/424199 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30944 event pairs, 775 based on Foata normal form. 3/5384 useless extension candidates. Maximal degree in co-relation 38786. Up to 5110 conditions per place. [2024-06-20 17:21:47,512 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 42 changer transitions 0/364 dead transitions. [2024-06-20 17:21:47,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 364 transitions, 5154 flow [2024-06-20 17:21:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:21:47,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 17:21:47,514 INFO L175 Difference]: Start difference. First operand has 285 places, 331 transitions, 4196 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:21:47,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 364 transitions, 5154 flow [2024-06-20 17:21:48,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 364 transitions, 4952 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:48,500 INFO L231 Difference]: Finished difference. Result has 288 places, 337 transitions, 4163 flow [2024-06-20 17:21:48,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3994, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4163, PETRI_PLACES=288, PETRI_TRANSITIONS=337} [2024-06-20 17:21:48,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-20 17:21:48,501 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 337 transitions, 4163 flow [2024-06-20 17:21:48,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-20 17:21:48,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:48,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:48,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:21:48,501 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)] === [2024-06-20 17:21:48,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:48,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1964167604, now seen corresponding path program 2 times [2024-06-20 17:21:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:48,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847175149] [2024-06-20 17:21:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:48,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:49,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:49,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847175149] [2024-06-20 17:21:49,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847175149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:49,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:49,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:49,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901871990] [2024-06-20 17:21:49,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:49,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:49,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:49,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:49,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:49,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:21:49,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 337 transitions, 4163 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-20 17:21:49,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:49,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:21:49,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:50,684 INFO L124 PetriNetUnfolderBase]: 3434/5404 cut-off events. [2024-06-20 17:21:50,684 INFO L125 PetriNetUnfolderBase]: For 434746/434746 co-relation queries the response was YES. [2024-06-20 17:21:50,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39526 conditions, 5404 events. 3434/5404 cut-off events. For 434746/434746 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31075 event pairs, 778 based on Foata normal form. 3/5403 useless extension candidates. Maximal degree in co-relation 39391. Up to 5184 conditions per place. [2024-06-20 17:21:50,751 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 296 selfloop transitions, 28 changer transitions 0/358 dead transitions. [2024-06-20 17:21:50,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 358 transitions, 4909 flow [2024-06-20 17:21:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 17:21:50,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-20 17:21:50,753 INFO L175 Difference]: Start difference. First operand has 288 places, 337 transitions, 4163 flow. Second operand 8 states and 125 transitions. [2024-06-20 17:21:50,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 358 transitions, 4909 flow [2024-06-20 17:21:51,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 358 transitions, 4820 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:51,831 INFO L231 Difference]: Finished difference. Result has 291 places, 340 transitions, 4184 flow [2024-06-20 17:21:51,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4082, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4184, PETRI_PLACES=291, PETRI_TRANSITIONS=340} [2024-06-20 17:21:51,831 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-20 17:21:51,831 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 340 transitions, 4184 flow [2024-06-20 17:21:51,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-20 17:21:51,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:51,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:51,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:21:51,832 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)] === [2024-06-20 17:21:51,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:51,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1113073750, now seen corresponding path program 1 times [2024-06-20 17:21:51,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:51,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300486391] [2024-06-20 17:21:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:52,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:52,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300486391] [2024-06-20 17:21:52,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300486391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:52,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:52,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:52,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762343350] [2024-06-20 17:21:52,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:52,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:52,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:52,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:52,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:52,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:52,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 340 transitions, 4184 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) [2024-06-20 17:21:52,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:52,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:52,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:53,954 INFO L124 PetriNetUnfolderBase]: 3547/5517 cut-off events. [2024-06-20 17:21:53,955 INFO L125 PetriNetUnfolderBase]: For 439920/439920 co-relation queries the response was YES. [2024-06-20 17:21:53,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40320 conditions, 5517 events. 3547/5517 cut-off events. For 439920/439920 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31274 event pairs, 809 based on Foata normal form. 1/5517 useless extension candidates. Maximal degree in co-relation 40183. Up to 5454 conditions per place. [2024-06-20 17:21:54,011 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 326 selfloop transitions, 26 changer transitions 0/355 dead transitions. [2024-06-20 17:21:54,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 355 transitions, 4980 flow [2024-06-20 17:21:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:21:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:21:54,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-20 17:21:54,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:21:54,012 INFO L175 Difference]: Start difference. First operand has 291 places, 340 transitions, 4184 flow. Second operand 5 states and 85 transitions. [2024-06-20 17:21:54,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 355 transitions, 4980 flow [2024-06-20 17:21:54,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 355 transitions, 4906 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:54,929 INFO L231 Difference]: Finished difference. Result has 290 places, 343 transitions, 4243 flow [2024-06-20 17:21:54,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4110, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4243, PETRI_PLACES=290, PETRI_TRANSITIONS=343} [2024-06-20 17:21:54,930 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-20 17:21:54,930 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 343 transitions, 4243 flow [2024-06-20 17:21:54,930 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) [2024-06-20 17:21:54,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:54,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:54,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:21:54,931 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)] === [2024-06-20 17:21:54,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash -594291292, now seen corresponding path program 3 times [2024-06-20 17:21:54,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:54,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952136816] [2024-06-20 17:21:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:54,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:55,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:55,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952136816] [2024-06-20 17:21:55,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952136816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:55,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:55,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:55,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5724367] [2024-06-20 17:21:55,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:55,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:55,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:55,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:55,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:55,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:21:55,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 343 transitions, 4243 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-20 17:21:55,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:55,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:21:55,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:57,048 INFO L124 PetriNetUnfolderBase]: 3421/5387 cut-off events. [2024-06-20 17:21:57,048 INFO L125 PetriNetUnfolderBase]: For 447660/447660 co-relation queries the response was YES. [2024-06-20 17:21:57,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39558 conditions, 5387 events. 3421/5387 cut-off events. For 447660/447660 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31014 event pairs, 778 based on Foata normal form. 4/5387 useless extension candidates. Maximal degree in co-relation 39420. Up to 5142 conditions per place. [2024-06-20 17:21:57,114 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 298 selfloop transitions, 40 changer transitions 0/372 dead transitions. [2024-06-20 17:21:57,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 372 transitions, 5253 flow [2024-06-20 17:21:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:21:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:21:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:21:57,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-20 17:21:57,115 INFO L175 Difference]: Start difference. First operand has 290 places, 343 transitions, 4243 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:21:57,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 372 transitions, 5253 flow [2024-06-20 17:21:58,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 372 transitions, 5174 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:58,044 INFO L231 Difference]: Finished difference. Result has 295 places, 349 transitions, 4393 flow [2024-06-20 17:21:58,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4393, PETRI_PLACES=295, PETRI_TRANSITIONS=349} [2024-06-20 17:21:58,045 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-20 17:21:58,045 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 349 transitions, 4393 flow [2024-06-20 17:21:58,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-20 17:21:58,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:58,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:58,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:21:58,045 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)] === [2024-06-20 17:21:58,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:58,046 INFO L85 PathProgramCache]: Analyzing trace with hash 213236790, now seen corresponding path program 1 times [2024-06-20 17:21:58,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:58,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238505069] [2024-06-20 17:21:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:58,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:58,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:58,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238505069] [2024-06-20 17:21:58,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238505069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:58,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:58,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:58,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006547292] [2024-06-20 17:21:58,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:58,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:58,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:58,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:58,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:58,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:21:58,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 349 transitions, 4393 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) [2024-06-20 17:21:58,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:58,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:21:58,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:59,980 INFO L124 PetriNetUnfolderBase]: 3550/5518 cut-off events. [2024-06-20 17:21:59,980 INFO L125 PetriNetUnfolderBase]: For 457256/457260 co-relation queries the response was YES. [2024-06-20 17:22:00,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41259 conditions, 5518 events. 3550/5518 cut-off events. For 457256/457260 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31257 event pairs, 778 based on Foata normal form. 5/5522 useless extension candidates. Maximal degree in co-relation 41119. Up to 5429 conditions per place. [2024-06-20 17:22:00,052 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 343 selfloop transitions, 34 changer transitions 0/380 dead transitions. [2024-06-20 17:22:00,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 380 transitions, 5537 flow [2024-06-20 17:22:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:22:00,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-20 17:22:00,053 INFO L175 Difference]: Start difference. First operand has 295 places, 349 transitions, 4393 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:22:00,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 380 transitions, 5537 flow [2024-06-20 17:22:01,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 380 transitions, 5452 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 17:22:01,040 INFO L231 Difference]: Finished difference. Result has 300 places, 355 transitions, 4550 flow [2024-06-20 17:22:01,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4310, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4550, PETRI_PLACES=300, PETRI_TRANSITIONS=355} [2024-06-20 17:22:01,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-20 17:22:01,040 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 355 transitions, 4550 flow [2024-06-20 17:22:01,040 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) [2024-06-20 17:22:01,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:01,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:01,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:22:01,041 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)] === [2024-06-20 17:22:01,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:01,041 INFO L85 PathProgramCache]: Analyzing trace with hash 213356760, now seen corresponding path program 2 times [2024-06-20 17:22:01,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:01,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15058340] [2024-06-20 17:22:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:01,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:01,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:01,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15058340] [2024-06-20 17:22:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15058340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:01,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:01,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:01,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147378274] [2024-06-20 17:22:01,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:01,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:01,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:01,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 355 transitions, 4550 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) [2024-06-20 17:22:01,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:01,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:01,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:03,152 INFO L124 PetriNetUnfolderBase]: 3560/5532 cut-off events. [2024-06-20 17:22:03,152 INFO L125 PetriNetUnfolderBase]: For 461072/461076 co-relation queries the response was YES. [2024-06-20 17:22:03,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41467 conditions, 5532 events. 3560/5532 cut-off events. For 461072/461076 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31362 event pairs, 782 based on Foata normal form. 5/5536 useless extension candidates. Maximal degree in co-relation 41325. Up to 5455 conditions per place. [2024-06-20 17:22:03,222 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 347 selfloop transitions, 32 changer transitions 0/382 dead transitions. [2024-06-20 17:22:03,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 382 transitions, 5497 flow [2024-06-20 17:22:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:03,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 17:22:03,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-20 17:22:03,223 INFO L175 Difference]: Start difference. First operand has 300 places, 355 transitions, 4550 flow. Second operand 8 states and 121 transitions. [2024-06-20 17:22:03,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 382 transitions, 5497 flow [2024-06-20 17:22:03,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 382 transitions, 5363 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:03,982 INFO L231 Difference]: Finished difference. Result has 304 places, 361 transitions, 4613 flow [2024-06-20 17:22:03,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4613, PETRI_PLACES=304, PETRI_TRANSITIONS=361} [2024-06-20 17:22:03,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-20 17:22:03,983 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 361 transitions, 4613 flow [2024-06-20 17:22:03,983 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) [2024-06-20 17:22:03,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:03,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:03,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:22:03,984 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)] === [2024-06-20 17:22:03,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:03,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1387348838, now seen corresponding path program 1 times [2024-06-20 17:22:03,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:03,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433293297] [2024-06-20 17:22:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:03,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:04,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:04,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433293297] [2024-06-20 17:22:04,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433293297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:04,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:04,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:04,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828569011] [2024-06-20 17:22:04,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:04,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:04,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:04,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:04,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:04,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:04,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 361 transitions, 4613 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) [2024-06-20 17:22:04,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:04,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:04,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:06,012 INFO L124 PetriNetUnfolderBase]: 3586/5568 cut-off events. [2024-06-20 17:22:06,012 INFO L125 PetriNetUnfolderBase]: For 481979/481983 co-relation queries the response was YES. [2024-06-20 17:22:06,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42071 conditions, 5568 events. 3586/5568 cut-off events. For 481979/481983 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31537 event pairs, 772 based on Foata normal form. 6/5573 useless extension candidates. Maximal degree in co-relation 41927. Up to 5459 conditions per place. [2024-06-20 17:22:06,093 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 355 selfloop transitions, 40 changer transitions 0/398 dead transitions. [2024-06-20 17:22:06,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 398 transitions, 5823 flow [2024-06-20 17:22:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 17:22:06,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-20 17:22:06,095 INFO L175 Difference]: Start difference. First operand has 304 places, 361 transitions, 4613 flow. Second operand 8 states and 127 transitions. [2024-06-20 17:22:06,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 398 transitions, 5823 flow [2024-06-20 17:22:07,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 398 transitions, 5699 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:07,131 INFO L231 Difference]: Finished difference. Result has 308 places, 374 transitions, 4805 flow [2024-06-20 17:22:07,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4805, PETRI_PLACES=308, PETRI_TRANSITIONS=374} [2024-06-20 17:22:07,132 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-20 17:22:07,132 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 374 transitions, 4805 flow [2024-06-20 17:22:07,132 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) [2024-06-20 17:22:07,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:07,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:07,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:22:07,132 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)] === [2024-06-20 17:22:07,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:07,133 INFO L85 PathProgramCache]: Analyzing trace with hash 390725616, now seen corresponding path program 2 times [2024-06-20 17:22:07,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:07,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413267151] [2024-06-20 17:22:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:07,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:07,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:07,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413267151] [2024-06-20 17:22:07,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413267151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:07,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:07,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:07,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969942327] [2024-06-20 17:22:07,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:07,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:07,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:07,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:07,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:07,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:07,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 374 transitions, 4805 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) [2024-06-20 17:22:07,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:07,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:07,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:09,186 INFO L124 PetriNetUnfolderBase]: 3596/5582 cut-off events. [2024-06-20 17:22:09,186 INFO L125 PetriNetUnfolderBase]: For 495823/495827 co-relation queries the response was YES. [2024-06-20 17:22:09,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42777 conditions, 5582 events. 3596/5582 cut-off events. For 495823/495827 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31662 event pairs, 769 based on Foata normal form. 6/5587 useless extension candidates. Maximal degree in co-relation 42631. Up to 5512 conditions per place. [2024-06-20 17:22:09,263 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 361 selfloop transitions, 33 changer transitions 0/397 dead transitions. [2024-06-20 17:22:09,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 397 transitions, 5732 flow [2024-06-20 17:22:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-20 17:22:09,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:22:09,264 INFO L175 Difference]: Start difference. First operand has 308 places, 374 transitions, 4805 flow. Second operand 8 states and 120 transitions. [2024-06-20 17:22:09,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 397 transitions, 5732 flow [2024-06-20 17:22:10,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 397 transitions, 5634 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-20 17:22:10,554 INFO L231 Difference]: Finished difference. Result has 313 places, 378 transitions, 4860 flow [2024-06-20 17:22:10,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4721, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4860, PETRI_PLACES=313, PETRI_TRANSITIONS=378} [2024-06-20 17:22:10,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-20 17:22:10,555 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 378 transitions, 4860 flow [2024-06-20 17:22:10,555 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) [2024-06-20 17:22:10,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:10,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:10,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:22:10,555 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)] === [2024-06-20 17:22:10,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:10,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1210217318, now seen corresponding path program 3 times [2024-06-20 17:22:10,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:10,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430584844] [2024-06-20 17:22:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:10,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:11,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:11,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430584844] [2024-06-20 17:22:11,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430584844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:11,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:11,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:11,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369252301] [2024-06-20 17:22:11,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:11,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:11,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:11,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:11,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:11,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 378 transitions, 4860 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) [2024-06-20 17:22:11,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:11,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:11,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:12,712 INFO L124 PetriNetUnfolderBase]: 3611/5603 cut-off events. [2024-06-20 17:22:12,712 INFO L125 PetriNetUnfolderBase]: For 508004/508008 co-relation queries the response was YES. [2024-06-20 17:22:12,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43100 conditions, 5603 events. 3611/5603 cut-off events. For 508004/508008 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31776 event pairs, 769 based on Foata normal form. 6/5608 useless extension candidates. Maximal degree in co-relation 42952. Up to 5522 conditions per place. [2024-06-20 17:22:12,791 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 364 selfloop transitions, 37 changer transitions 0/404 dead transitions. [2024-06-20 17:22:12,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 404 transitions, 5830 flow [2024-06-20 17:22:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 17:22:12,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-20 17:22:12,792 INFO L175 Difference]: Start difference. First operand has 313 places, 378 transitions, 4860 flow. Second operand 8 states and 123 transitions. [2024-06-20 17:22:12,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 404 transitions, 5830 flow [2024-06-20 17:22:14,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 404 transitions, 5723 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:14,053 INFO L231 Difference]: Finished difference. Result has 317 places, 384 transitions, 4952 flow [2024-06-20 17:22:14,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4952, PETRI_PLACES=317, PETRI_TRANSITIONS=384} [2024-06-20 17:22:14,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-20 17:22:14,053 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 384 transitions, 4952 flow [2024-06-20 17:22:14,053 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) [2024-06-20 17:22:14,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:14,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:14,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:22:14,054 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)] === [2024-06-20 17:22:14,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:14,054 INFO L85 PathProgramCache]: Analyzing trace with hash 390488280, now seen corresponding path program 3 times [2024-06-20 17:22:14,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:14,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966796790] [2024-06-20 17:22:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:14,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:14,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:14,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966796790] [2024-06-20 17:22:14,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966796790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:14,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:14,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:14,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506427848] [2024-06-20 17:22:14,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:14,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:14,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:14,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:14,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:14,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:14,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 384 transitions, 4952 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) [2024-06-20 17:22:14,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:14,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:14,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:16,099 INFO L124 PetriNetUnfolderBase]: 3616/5610 cut-off events. [2024-06-20 17:22:16,099 INFO L125 PetriNetUnfolderBase]: For 514580/514584 co-relation queries the response was YES. [2024-06-20 17:22:16,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43325 conditions, 5610 events. 3616/5610 cut-off events. For 514580/514584 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31739 event pairs, 772 based on Foata normal form. 5/5614 useless extension candidates. Maximal degree in co-relation 43175. Up to 5552 conditions per place. [2024-06-20 17:22:16,176 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 375 selfloop transitions, 27 changer transitions 0/405 dead transitions. [2024-06-20 17:22:16,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 405 transitions, 5894 flow [2024-06-20 17:22:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-20 17:22:16,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-20 17:22:16,177 INFO L175 Difference]: Start difference. First operand has 317 places, 384 transitions, 4952 flow. Second operand 8 states and 117 transitions. [2024-06-20 17:22:16,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 405 transitions, 5894 flow [2024-06-20 17:22:17,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 405 transitions, 5779 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:17,550 INFO L231 Difference]: Finished difference. Result has 320 places, 387 transitions, 4983 flow [2024-06-20 17:22:17,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4837, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4983, PETRI_PLACES=320, PETRI_TRANSITIONS=387} [2024-06-20 17:22:17,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-20 17:22:17,550 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 387 transitions, 4983 flow [2024-06-20 17:22:17,550 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) [2024-06-20 17:22:17,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:17,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:17,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:22:17,551 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)] === [2024-06-20 17:22:17,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:17,551 INFO L85 PathProgramCache]: Analyzing trace with hash 390734544, now seen corresponding path program 1 times [2024-06-20 17:22:17,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:17,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508592678] [2024-06-20 17:22:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:17,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:18,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508592678] [2024-06-20 17:22:18,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508592678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:18,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:18,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:18,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685878698] [2024-06-20 17:22:18,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:18,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:18,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:18,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 387 transitions, 4983 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) [2024-06-20 17:22:18,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:18,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:18,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:20,068 INFO L124 PetriNetUnfolderBase]: 3624/5622 cut-off events. [2024-06-20 17:22:20,068 INFO L125 PetriNetUnfolderBase]: For 529758/529762 co-relation queries the response was YES. [2024-06-20 17:22:20,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43475 conditions, 5622 events. 3624/5622 cut-off events. For 529758/529762 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31821 event pairs, 770 based on Foata normal form. 6/5627 useless extension candidates. Maximal degree in co-relation 43324. Up to 5538 conditions per place. [2024-06-20 17:22:20,145 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 364 selfloop transitions, 41 changer transitions 0/408 dead transitions. [2024-06-20 17:22:20,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 408 transitions, 5895 flow [2024-06-20 17:22:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-20 17:22:20,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-20 17:22:20,146 INFO L175 Difference]: Start difference. First operand has 320 places, 387 transitions, 4983 flow. Second operand 8 states and 122 transitions. [2024-06-20 17:22:20,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 408 transitions, 5895 flow [2024-06-20 17:22:21,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 408 transitions, 5759 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:21,543 INFO L231 Difference]: Finished difference. Result has 321 places, 389 transitions, 4980 flow [2024-06-20 17:22:21,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4847, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4980, PETRI_PLACES=321, PETRI_TRANSITIONS=389} [2024-06-20 17:22:21,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-20 17:22:21,544 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 389 transitions, 4980 flow [2024-06-20 17:22:21,544 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) [2024-06-20 17:22:21,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:21,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:21,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:22:21,544 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)] === [2024-06-20 17:22:21,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:21,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1362064330, now seen corresponding path program 4 times [2024-06-20 17:22:21,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:21,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474206672] [2024-06-20 17:22:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:21,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:22,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:22,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474206672] [2024-06-20 17:22:22,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474206672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:22,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:22,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:22,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834033027] [2024-06-20 17:22:22,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:22,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:22,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:22,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:22,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:22,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 389 transitions, 4980 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) [2024-06-20 17:22:22,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:22,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:22,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:23,487 INFO L124 PetriNetUnfolderBase]: 3637/5642 cut-off events. [2024-06-20 17:22:23,487 INFO L125 PetriNetUnfolderBase]: For 544926/544958 co-relation queries the response was YES. [2024-06-20 17:22:23,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44036 conditions, 5642 events. 3637/5642 cut-off events. For 544926/544958 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 31953 event pairs, 776 based on Foata normal form. 25/5664 useless extension candidates. Maximal degree in co-relation 43885. Up to 5459 conditions per place. [2024-06-20 17:22:23,568 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 356 selfloop transitions, 71 changer transitions 0/430 dead transitions. [2024-06-20 17:22:23,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 430 transitions, 6748 flow [2024-06-20 17:22:23,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 17:22:23,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-20 17:22:23,569 INFO L175 Difference]: Start difference. First operand has 321 places, 389 transitions, 4980 flow. Second operand 8 states and 129 transitions. [2024-06-20 17:22:23,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 430 transitions, 6748 flow [2024-06-20 17:22:24,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 430 transitions, 6631 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:24,936 INFO L231 Difference]: Finished difference. Result has 324 places, 405 transitions, 5420 flow [2024-06-20 17:22:24,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4863, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5420, PETRI_PLACES=324, PETRI_TRANSITIONS=405} [2024-06-20 17:22:24,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-20 17:22:24,937 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 405 transitions, 5420 flow [2024-06-20 17:22:24,937 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) [2024-06-20 17:22:24,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:24,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:24,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:22:24,937 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)] === [2024-06-20 17:22:24,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:24,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1019645584, now seen corresponding path program 4 times [2024-06-20 17:22:24,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:24,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356229538] [2024-06-20 17:22:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:24,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:25,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:25,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356229538] [2024-06-20 17:22:25,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356229538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:25,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:25,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:25,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23437883] [2024-06-20 17:22:25,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:25,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:25,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:25,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:25,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:25,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:25,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 405 transitions, 5420 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) [2024-06-20 17:22:25,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:25,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:25,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:27,025 INFO L124 PetriNetUnfolderBase]: 3660/5674 cut-off events. [2024-06-20 17:22:27,025 INFO L125 PetriNetUnfolderBase]: For 567741/567773 co-relation queries the response was YES. [2024-06-20 17:22:27,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44954 conditions, 5674 events. 3660/5674 cut-off events. For 567741/567773 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 32183 event pairs, 776 based on Foata normal form. 26/5697 useless extension candidates. Maximal degree in co-relation 44801. Up to 5483 conditions per place. [2024-06-20 17:22:27,109 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 365 selfloop transitions, 70 changer transitions 0/438 dead transitions. [2024-06-20 17:22:27,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 438 transitions, 6873 flow [2024-06-20 17:22:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 17:22:27,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:22:27,110 INFO L175 Difference]: Start difference. First operand has 324 places, 405 transitions, 5420 flow. Second operand 8 states and 128 transitions. [2024-06-20 17:22:27,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 438 transitions, 6873 flow [2024-06-20 17:22:28,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 438 transitions, 6726 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-20 17:22:28,511 INFO L231 Difference]: Finished difference. Result has 331 places, 414 transitions, 5602 flow [2024-06-20 17:22:28,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5273, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5602, PETRI_PLACES=331, PETRI_TRANSITIONS=414} [2024-06-20 17:22:28,511 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-20 17:22:28,511 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 414 transitions, 5602 flow [2024-06-20 17:22:28,511 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) [2024-06-20 17:22:28,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:28,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:28,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:22:28,512 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)] === [2024-06-20 17:22:28,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:28,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1361944360, now seen corresponding path program 5 times [2024-06-20 17:22:28,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:28,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344232776] [2024-06-20 17:22:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:28,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:29,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:29,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344232776] [2024-06-20 17:22:29,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344232776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:29,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:29,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:29,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430928741] [2024-06-20 17:22:29,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:29,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:29,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:29,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:29,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:29,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 414 transitions, 5602 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) [2024-06-20 17:22:29,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:29,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:29,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:30,641 INFO L124 PetriNetUnfolderBase]: 3665/5681 cut-off events. [2024-06-20 17:22:30,641 INFO L125 PetriNetUnfolderBase]: For 577966/577998 co-relation queries the response was YES. [2024-06-20 17:22:30,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45436 conditions, 5681 events. 3665/5681 cut-off events. For 577966/577998 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 32198 event pairs, 779 based on Foata normal form. 25/5703 useless extension candidates. Maximal degree in co-relation 45280. Up to 5569 conditions per place. [2024-06-20 17:22:30,717 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 385 selfloop transitions, 48 changer transitions 0/436 dead transitions. [2024-06-20 17:22:30,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 436 transitions, 6604 flow [2024-06-20 17:22:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-20 17:22:30,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:22:30,718 INFO L175 Difference]: Start difference. First operand has 331 places, 414 transitions, 5602 flow. Second operand 8 states and 120 transitions. [2024-06-20 17:22:30,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 436 transitions, 6604 flow [2024-06-20 17:22:32,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 436 transitions, 6403 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:32,267 INFO L231 Difference]: Finished difference. Result has 335 places, 417 transitions, 5583 flow [2024-06-20 17:22:32,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5583, PETRI_PLACES=335, PETRI_TRANSITIONS=417} [2024-06-20 17:22:32,268 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-20 17:22:32,268 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 417 transitions, 5583 flow [2024-06-20 17:22:32,268 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) [2024-06-20 17:22:32,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:32,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:32,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:22:32,269 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)] === [2024-06-20 17:22:32,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:32,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1134163180, now seen corresponding path program 6 times [2024-06-20 17:22:32,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:32,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496500974] [2024-06-20 17:22:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:32,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:33,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:33,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496500974] [2024-06-20 17:22:33,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496500974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:33,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:33,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:33,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878646859] [2024-06-20 17:22:33,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:33,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:33,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:33,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:33,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 417 transitions, 5583 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) [2024-06-20 17:22:33,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:33,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:33,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:34,346 INFO L124 PetriNetUnfolderBase]: 3670/5688 cut-off events. [2024-06-20 17:22:34,347 INFO L125 PetriNetUnfolderBase]: For 587995/588027 co-relation queries the response was YES. [2024-06-20 17:22:34,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45292 conditions, 5688 events. 3670/5688 cut-off events. For 587995/588027 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 32278 event pairs, 779 based on Foata normal form. 25/5710 useless extension candidates. Maximal degree in co-relation 45135. Up to 5500 conditions per place. [2024-06-20 17:22:34,427 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 357 selfloop transitions, 84 changer transitions 0/444 dead transitions. [2024-06-20 17:22:34,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 444 transitions, 6953 flow [2024-06-20 17:22:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 17:22:34,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-20 17:22:34,428 INFO L175 Difference]: Start difference. First operand has 335 places, 417 transitions, 5583 flow. Second operand 8 states and 127 transitions. [2024-06-20 17:22:34,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 444 transitions, 6953 flow [2024-06-20 17:22:36,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 444 transitions, 6791 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:36,102 INFO L231 Difference]: Finished difference. Result has 336 places, 420 transitions, 5671 flow [2024-06-20 17:22:36,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5671, PETRI_PLACES=336, PETRI_TRANSITIONS=420} [2024-06-20 17:22:36,102 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-20 17:22:36,103 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 420 transitions, 5671 flow [2024-06-20 17:22:36,103 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) [2024-06-20 17:22:36,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:36,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:36,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:22:36,103 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)] === [2024-06-20 17:22:36,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:36,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1122735340, now seen corresponding path program 7 times [2024-06-20 17:22:36,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:36,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466642125] [2024-06-20 17:22:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:36,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:36,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:36,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466642125] [2024-06-20 17:22:36,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466642125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:36,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:36,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:36,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346706751] [2024-06-20 17:22:36,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:36,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:36,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:36,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:36,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:37,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:37,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 420 transitions, 5671 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) [2024-06-20 17:22:37,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:37,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:37,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:38,383 INFO L124 PetriNetUnfolderBase]: 3675/5695 cut-off events. [2024-06-20 17:22:38,383 INFO L125 PetriNetUnfolderBase]: For 601167/601199 co-relation queries the response was YES. [2024-06-20 17:22:38,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45582 conditions, 5695 events. 3675/5695 cut-off events. For 601167/601199 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32290 event pairs, 781 based on Foata normal form. 25/5717 useless extension candidates. Maximal degree in co-relation 45425. Up to 5506 conditions per place. [2024-06-20 17:22:38,636 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 353 selfloop transitions, 88 changer transitions 0/444 dead transitions. [2024-06-20 17:22:38,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 444 transitions, 6900 flow [2024-06-20 17:22:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 17:22:38,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-20 17:22:38,637 INFO L175 Difference]: Start difference. First operand has 336 places, 420 transitions, 5671 flow. Second operand 8 states and 123 transitions. [2024-06-20 17:22:38,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 444 transitions, 6900 flow [2024-06-20 17:22:40,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 444 transitions, 6651 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:40,256 INFO L231 Difference]: Finished difference. Result has 338 places, 424 transitions, 5717 flow [2024-06-20 17:22:40,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5435, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5717, PETRI_PLACES=338, PETRI_TRANSITIONS=424} [2024-06-20 17:22:40,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-20 17:22:40,257 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 424 transitions, 5717 flow [2024-06-20 17:22:40,257 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) [2024-06-20 17:22:40,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:40,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:40,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:22:40,258 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)] === [2024-06-20 17:22:40,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1007265424, now seen corresponding path program 5 times [2024-06-20 17:22:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:40,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585325421] [2024-06-20 17:22:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:41,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:41,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585325421] [2024-06-20 17:22:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585325421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:41,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386673288] [2024-06-20 17:22:41,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:41,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:41,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:41,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 424 transitions, 5717 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) [2024-06-20 17:22:41,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:41,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:41,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:42,449 INFO L124 PetriNetUnfolderBase]: 3685/5711 cut-off events. [2024-06-20 17:22:42,449 INFO L125 PetriNetUnfolderBase]: For 617617/617617 co-relation queries the response was YES. [2024-06-20 17:22:42,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45719 conditions, 5711 events. 3685/5711 cut-off events. For 617617/617617 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 32425 event pairs, 795 based on Foata normal form. 2/5712 useless extension candidates. Maximal degree in co-relation 45562. Up to 5646 conditions per place. [2024-06-20 17:22:42,530 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 416 selfloop transitions, 26 changer transitions 0/445 dead transitions. [2024-06-20 17:22:42,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 445 transitions, 6726 flow [2024-06-20 17:22:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-20 17:22:42,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-20 17:22:42,531 INFO L175 Difference]: Start difference. First operand has 338 places, 424 transitions, 5717 flow. Second operand 8 states and 119 transitions. [2024-06-20 17:22:42,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 445 transitions, 6726 flow [2024-06-20 17:22:44,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 445 transitions, 6530 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:44,162 INFO L231 Difference]: Finished difference. Result has 343 places, 428 transitions, 5658 flow [2024-06-20 17:22:44,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5523, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5658, PETRI_PLACES=343, PETRI_TRANSITIONS=428} [2024-06-20 17:22:44,163 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-20 17:22:44,163 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 428 transitions, 5658 flow [2024-06-20 17:22:44,163 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) [2024-06-20 17:22:44,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:44,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:44,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:22:44,163 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)] === [2024-06-20 17:22:44,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:44,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1007444170, now seen corresponding path program 8 times [2024-06-20 17:22:44,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:44,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939930660] [2024-06-20 17:22:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:44,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:45,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:45,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939930660] [2024-06-20 17:22:45,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939930660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:45,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:45,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:45,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589630782] [2024-06-20 17:22:45,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:45,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:45,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:45,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:45,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:45,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 428 transitions, 5658 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) [2024-06-20 17:22:45,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:45,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:45,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:46,342 INFO L124 PetriNetUnfolderBase]: 3703/5734 cut-off events. [2024-06-20 17:22:46,342 INFO L125 PetriNetUnfolderBase]: For 631698/631730 co-relation queries the response was YES. [2024-06-20 17:22:46,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46044 conditions, 5734 events. 3703/5734 cut-off events. For 631698/631730 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 32531 event pairs, 779 based on Foata normal form. 25/5756 useless extension candidates. Maximal degree in co-relation 45885. Up to 5608 conditions per place. [2024-06-20 17:22:46,422 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 389 selfloop transitions, 63 changer transitions 0/455 dead transitions. [2024-06-20 17:22:46,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 455 transitions, 7007 flow [2024-06-20 17:22:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-20 17:22:46,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-20 17:22:46,423 INFO L175 Difference]: Start difference. First operand has 343 places, 428 transitions, 5658 flow. Second operand 8 states and 119 transitions. [2024-06-20 17:22:46,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 455 transitions, 7007 flow [2024-06-20 17:22:48,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 455 transitions, 6911 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:48,189 INFO L231 Difference]: Finished difference. Result has 347 places, 438 transitions, 5941 flow [2024-06-20 17:22:48,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5562, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5941, PETRI_PLACES=347, PETRI_TRANSITIONS=438} [2024-06-20 17:22:48,189 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-20 17:22:48,189 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 438 transitions, 5941 flow [2024-06-20 17:22:48,189 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) [2024-06-20 17:22:48,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:48,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:48,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:22:48,190 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)] === [2024-06-20 17:22:48,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:48,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1007681134, now seen corresponding path program 6 times [2024-06-20 17:22:48,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:48,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255323833] [2024-06-20 17:22:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:48,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:49,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:49,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255323833] [2024-06-20 17:22:49,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255323833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:49,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:49,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:49,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447776449] [2024-06-20 17:22:49,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:49,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:49,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:49,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:49,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:49,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:49,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 438 transitions, 5941 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) [2024-06-20 17:22:49,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:49,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:49,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:50,446 INFO L124 PetriNetUnfolderBase]: 3713/5748 cut-off events. [2024-06-20 17:22:50,446 INFO L125 PetriNetUnfolderBase]: For 649754/649786 co-relation queries the response was YES. [2024-06-20 17:22:50,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46388 conditions, 5748 events. 3713/5748 cut-off events. For 649754/649786 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32615 event pairs, 777 based on Foata normal form. 26/5771 useless extension candidates. Maximal degree in co-relation 46227. Up to 5546 conditions per place. [2024-06-20 17:22:50,514 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 382 selfloop transitions, 77 changer transitions 0/462 dead transitions. [2024-06-20 17:22:50,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 462 transitions, 7175 flow [2024-06-20 17:22:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 17:22:50,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-20 17:22:50,515 INFO L175 Difference]: Start difference. First operand has 347 places, 438 transitions, 5941 flow. Second operand 8 states and 126 transitions. [2024-06-20 17:22:50,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 462 transitions, 7175 flow [2024-06-20 17:22:52,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 462 transitions, 7027 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:52,338 INFO L231 Difference]: Finished difference. Result has 351 places, 441 transitions, 6015 flow [2024-06-20 17:22:52,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6015, PETRI_PLACES=351, PETRI_TRANSITIONS=441} [2024-06-20 17:22:52,339 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-20 17:22:52,339 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 441 transitions, 6015 flow [2024-06-20 17:22:52,339 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) [2024-06-20 17:22:52,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:52,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:52,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:22:52,340 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)] === [2024-06-20 17:22:52,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:52,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1007681320, now seen corresponding path program 9 times [2024-06-20 17:22:52,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:52,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336508826] [2024-06-20 17:22:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:52,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:53,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336508826] [2024-06-20 17:22:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336508826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:53,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:53,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:53,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499697604] [2024-06-20 17:22:53,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:53,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:53,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:53,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:53,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 441 transitions, 6015 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) [2024-06-20 17:22:53,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:53,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:53,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:54,530 INFO L124 PetriNetUnfolderBase]: 3710/5744 cut-off events. [2024-06-20 17:22:54,530 INFO L125 PetriNetUnfolderBase]: For 655585/655617 co-relation queries the response was YES. [2024-06-20 17:22:54,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46448 conditions, 5744 events. 3710/5744 cut-off events. For 655585/655617 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32623 event pairs, 781 based on Foata normal form. 25/5766 useless extension candidates. Maximal degree in co-relation 46287. Up to 5619 conditions per place. [2024-06-20 17:22:54,615 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 392 selfloop transitions, 64 changer transitions 0/459 dead transitions. [2024-06-20 17:22:54,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 459 transitions, 6983 flow [2024-06-20 17:22:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-20 17:22:54,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-20 17:22:54,616 INFO L175 Difference]: Start difference. First operand has 351 places, 441 transitions, 6015 flow. Second operand 10 states and 140 transitions. [2024-06-20 17:22:54,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 459 transitions, 6983 flow [2024-06-20 17:22:56,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 459 transitions, 6761 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:56,761 INFO L231 Difference]: Finished difference. Result has 357 places, 441 transitions, 5927 flow [2024-06-20 17:22:56,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5927, PETRI_PLACES=357, PETRI_TRANSITIONS=441} [2024-06-20 17:22:56,761 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-20 17:22:56,761 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 441 transitions, 5927 flow [2024-06-20 17:22:56,761 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) [2024-06-20 17:22:56,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:56,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:56,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:22:56,762 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)] === [2024-06-20 17:22:56,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash -153835604, now seen corresponding path program 7 times [2024-06-20 17:22:56,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:56,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485521378] [2024-06-20 17:22:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:56,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:57,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:57,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485521378] [2024-06-20 17:22:57,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485521378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:57,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:57,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:57,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702698109] [2024-06-20 17:22:57,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:57,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:57,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:57,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:22:57,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 441 transitions, 5927 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) [2024-06-20 17:22:57,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:57,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:22:57,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:58,840 INFO L124 PetriNetUnfolderBase]: 3746/5792 cut-off events. [2024-06-20 17:22:58,840 INFO L125 PetriNetUnfolderBase]: For 680891/680895 co-relation queries the response was YES. [2024-06-20 17:22:58,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47041 conditions, 5792 events. 3746/5792 cut-off events. For 680891/680895 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32878 event pairs, 772 based on Foata normal form. 6/5797 useless extension candidates. Maximal degree in co-relation 46879. Up to 5655 conditions per place. [2024-06-20 17:22:58,921 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 410 selfloop transitions, 64 changer transitions 0/477 dead transitions. [2024-06-20 17:22:58,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 477 transitions, 7323 flow [2024-06-20 17:22:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:22:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:22:58,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:22:58,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-20 17:22:58,924 INFO L175 Difference]: Start difference. First operand has 357 places, 441 transitions, 5927 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:22:58,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 477 transitions, 7323 flow [2024-06-20 17:23:01,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 477 transitions, 7171 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 17:23:01,355 INFO L231 Difference]: Finished difference. Result has 357 places, 451 transitions, 6174 flow [2024-06-20 17:23:01,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5775, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6174, PETRI_PLACES=357, PETRI_TRANSITIONS=451} [2024-06-20 17:23:01,355 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-20 17:23:01,355 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 451 transitions, 6174 flow [2024-06-20 17:23:01,356 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) [2024-06-20 17:23:01,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:01,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:01,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:23:01,356 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)] === [2024-06-20 17:23:01,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash -159549524, now seen corresponding path program 8 times [2024-06-20 17:23:01,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:01,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772274542] [2024-06-20 17:23:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:02,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:02,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772274542] [2024-06-20 17:23:02,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772274542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:02,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:02,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:02,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702864610] [2024-06-20 17:23:02,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:02,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:02,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:02,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:02,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:02,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:02,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 451 transitions, 6174 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) [2024-06-20 17:23:02,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:02,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:02,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:03,461 INFO L124 PetriNetUnfolderBase]: 3740/5784 cut-off events. [2024-06-20 17:23:03,461 INFO L125 PetriNetUnfolderBase]: For 687233/687237 co-relation queries the response was YES. [2024-06-20 17:23:03,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47148 conditions, 5784 events. 3740/5784 cut-off events. For 687233/687237 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32815 event pairs, 773 based on Foata normal form. 6/5789 useless extension candidates. Maximal degree in co-relation 46983. Up to 5697 conditions per place. [2024-06-20 17:23:03,536 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 429 selfloop transitions, 39 changer transitions 0/471 dead transitions. [2024-06-20 17:23:03,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 471 transitions, 7180 flow [2024-06-20 17:23:03,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:23:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:23:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 17:23:03,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-20 17:23:03,537 INFO L175 Difference]: Start difference. First operand has 357 places, 451 transitions, 6174 flow. Second operand 6 states and 103 transitions. [2024-06-20 17:23:03,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 471 transitions, 7180 flow [2024-06-20 17:23:05,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 471 transitions, 7043 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-20 17:23:05,510 INFO L231 Difference]: Finished difference. Result has 360 places, 451 transitions, 6137 flow [2024-06-20 17:23:05,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6037, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6137, PETRI_PLACES=360, PETRI_TRANSITIONS=451} [2024-06-20 17:23:05,510 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-20 17:23:05,510 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 451 transitions, 6137 flow [2024-06-20 17:23:05,511 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) [2024-06-20 17:23:05,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:05,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:05,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:23:05,511 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)] === [2024-06-20 17:23:05,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:05,512 INFO L85 PathProgramCache]: Analyzing trace with hash -889068474, now seen corresponding path program 9 times [2024-06-20 17:23:05,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:05,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579285833] [2024-06-20 17:23:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:05,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:06,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:06,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579285833] [2024-06-20 17:23:06,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579285833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:06,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:06,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:06,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859015063] [2024-06-20 17:23:06,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:06,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:06,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:06,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:06,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 451 transitions, 6137 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) [2024-06-20 17:23:06,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:06,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:06,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:07,587 INFO L124 PetriNetUnfolderBase]: 3750/5798 cut-off events. [2024-06-20 17:23:07,587 INFO L125 PetriNetUnfolderBase]: For 701657/701661 co-relation queries the response was YES. [2024-06-20 17:23:07,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47333 conditions, 5798 events. 3750/5798 cut-off events. For 701657/701661 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32915 event pairs, 773 based on Foata normal form. 6/5803 useless extension candidates. Maximal degree in co-relation 47167. Up to 5722 conditions per place. [2024-06-20 17:23:07,669 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 432 selfloop transitions, 37 changer transitions 0/472 dead transitions. [2024-06-20 17:23:07,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 472 transitions, 7214 flow [2024-06-20 17:23:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-20 17:23:07,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-20 17:23:07,670 INFO L175 Difference]: Start difference. First operand has 360 places, 451 transitions, 6137 flow. Second operand 7 states and 109 transitions. [2024-06-20 17:23:07,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 472 transitions, 7214 flow [2024-06-20 17:23:10,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 472 transitions, 7152 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 17:23:10,335 INFO L231 Difference]: Finished difference. Result has 363 places, 454 transitions, 6242 flow [2024-06-20 17:23:10,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6075, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6242, PETRI_PLACES=363, PETRI_TRANSITIONS=454} [2024-06-20 17:23:10,336 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-20 17:23:10,336 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 454 transitions, 6242 flow [2024-06-20 17:23:10,336 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) [2024-06-20 17:23:10,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:10,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:10,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:23:10,336 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)] === [2024-06-20 17:23:10,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:10,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1689016138, now seen corresponding path program 10 times [2024-06-20 17:23:10,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:10,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235490680] [2024-06-20 17:23:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:10,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:11,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:11,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235490680] [2024-06-20 17:23:11,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235490680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:11,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:11,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:11,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935046959] [2024-06-20 17:23:11,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:11,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:11,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:11,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:11,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:11,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:11,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 454 transitions, 6242 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) [2024-06-20 17:23:11,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:11,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:11,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:12,497 INFO L124 PetriNetUnfolderBase]: 3747/5796 cut-off events. [2024-06-20 17:23:12,497 INFO L125 PetriNetUnfolderBase]: For 709497/709529 co-relation queries the response was YES. [2024-06-20 17:23:12,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47395 conditions, 5796 events. 3747/5796 cut-off events. For 709497/709529 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32951 event pairs, 777 based on Foata normal form. 25/5818 useless extension candidates. Maximal degree in co-relation 47228. Up to 5645 conditions per place. [2024-06-20 17:23:12,583 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 409 selfloop transitions, 64 changer transitions 0/476 dead transitions. [2024-06-20 17:23:12,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 476 transitions, 7446 flow [2024-06-20 17:23:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 17:23:12,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:23:12,585 INFO L175 Difference]: Start difference. First operand has 363 places, 454 transitions, 6242 flow. Second operand 7 states and 115 transitions. [2024-06-20 17:23:12,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 476 transitions, 7446 flow [2024-06-20 17:23:14,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 476 transitions, 7250 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:14,835 INFO L231 Difference]: Finished difference. Result has 365 places, 454 transitions, 6186 flow [2024-06-20 17:23:14,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6048, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6186, PETRI_PLACES=365, PETRI_TRANSITIONS=454} [2024-06-20 17:23:14,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-20 17:23:14,836 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 454 transitions, 6186 flow [2024-06-20 17:23:14,836 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) [2024-06-20 17:23:14,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:14,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:14,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:23:14,836 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)] === [2024-06-20 17:23:14,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:14,836 INFO L85 PathProgramCache]: Analyzing trace with hash -889305624, now seen corresponding path program 10 times [2024-06-20 17:23:14,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:14,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791786850] [2024-06-20 17:23:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:14,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:15,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:15,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791786850] [2024-06-20 17:23:15,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791786850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:15,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:15,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:15,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086990299] [2024-06-20 17:23:15,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:15,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:15,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:15,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:15,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:15,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 454 transitions, 6186 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) [2024-06-20 17:23:15,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:15,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:15,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:16,915 INFO L124 PetriNetUnfolderBase]: 3741/5786 cut-off events. [2024-06-20 17:23:16,915 INFO L125 PetriNetUnfolderBase]: For 702112/702116 co-relation queries the response was YES. [2024-06-20 17:23:16,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47019 conditions, 5786 events. 3741/5786 cut-off events. For 702112/702116 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32878 event pairs, 772 based on Foata normal form. 6/5791 useless extension candidates. Maximal degree in co-relation 46852. Up to 5661 conditions per place. [2024-06-20 17:23:17,002 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 416 selfloop transitions, 57 changer transitions 0/476 dead transitions. [2024-06-20 17:23:17,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 476 transitions, 7210 flow [2024-06-20 17:23:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 17:23:17,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:23:17,004 INFO L175 Difference]: Start difference. First operand has 365 places, 454 transitions, 6186 flow. Second operand 7 states and 115 transitions. [2024-06-20 17:23:17,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 476 transitions, 7210 flow [2024-06-20 17:23:19,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 476 transitions, 6986 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-20 17:23:19,450 INFO L231 Difference]: Finished difference. Result has 364 places, 454 transitions, 6090 flow [2024-06-20 17:23:19,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5962, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6090, PETRI_PLACES=364, PETRI_TRANSITIONS=454} [2024-06-20 17:23:19,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-20 17:23:19,451 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 454 transitions, 6090 flow [2024-06-20 17:23:19,451 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) [2024-06-20 17:23:19,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:19,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:19,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:23:19,451 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)] === [2024-06-20 17:23:19,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:19,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2016150128, now seen corresponding path program 11 times [2024-06-20 17:23:19,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:19,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484068440] [2024-06-20 17:23:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:19,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:20,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:20,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484068440] [2024-06-20 17:23:20,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484068440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:20,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:20,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:20,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128569795] [2024-06-20 17:23:20,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:20,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:20,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:20,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:20,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:20,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:20,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 454 transitions, 6090 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) [2024-06-20 17:23:20,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:20,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:20,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:21,790 INFO L124 PetriNetUnfolderBase]: 3738/5782 cut-off events. [2024-06-20 17:23:21,791 INFO L125 PetriNetUnfolderBase]: For 692545/692549 co-relation queries the response was YES. [2024-06-20 17:23:21,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46757 conditions, 5782 events. 3738/5782 cut-off events. For 692545/692549 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32852 event pairs, 773 based on Foata normal form. 5/5786 useless extension candidates. Maximal degree in co-relation 46591. Up to 5695 conditions per place. [2024-06-20 17:23:21,859 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 436 selfloop transitions, 38 changer transitions 0/477 dead transitions. [2024-06-20 17:23:21,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 477 transitions, 7114 flow [2024-06-20 17:23:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 17:23:21,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-20 17:23:21,860 INFO L175 Difference]: Start difference. First operand has 364 places, 454 transitions, 6090 flow. Second operand 7 states and 114 transitions. [2024-06-20 17:23:21,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 477 transitions, 7114 flow [2024-06-20 17:23:23,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 477 transitions, 6916 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:23,961 INFO L231 Difference]: Finished difference. Result has 365 places, 454 transitions, 5982 flow [2024-06-20 17:23:23,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5982, PETRI_PLACES=365, PETRI_TRANSITIONS=454} [2024-06-20 17:23:23,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-20 17:23:23,962 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 454 transitions, 5982 flow [2024-06-20 17:23:23,962 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) [2024-06-20 17:23:23,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:23,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:23,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:23:23,963 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)] === [2024-06-20 17:23:23,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:23,964 INFO L85 PathProgramCache]: Analyzing trace with hash -382152464, now seen corresponding path program 11 times [2024-06-20 17:23:23,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:23,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293041124] [2024-06-20 17:23:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:23,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:24,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:24,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293041124] [2024-06-20 17:23:24,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293041124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:24,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:24,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:24,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121182719] [2024-06-20 17:23:24,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:24,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:24,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:24,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:24,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:24,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:24,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 454 transitions, 5982 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) [2024-06-20 17:23:24,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:24,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:24,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:26,112 INFO L124 PetriNetUnfolderBase]: 3748/5798 cut-off events. [2024-06-20 17:23:26,112 INFO L125 PetriNetUnfolderBase]: For 684771/684803 co-relation queries the response was YES. [2024-06-20 17:23:26,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46607 conditions, 5798 events. 3748/5798 cut-off events. For 684771/684803 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32956 event pairs, 777 based on Foata normal form. 26/5821 useless extension candidates. Maximal degree in co-relation 46441. Up to 5575 conditions per place. [2024-06-20 17:23:26,195 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 381 selfloop transitions, 95 changer transitions 0/479 dead transitions. [2024-06-20 17:23:26,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 479 transitions, 7269 flow [2024-06-20 17:23:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 17:23:26,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 17:23:26,197 INFO L175 Difference]: Start difference. First operand has 365 places, 454 transitions, 5982 flow. Second operand 7 states and 116 transitions. [2024-06-20 17:23:26,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 479 transitions, 7269 flow [2024-06-20 17:23:28,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 479 transitions, 7179 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:28,398 INFO L231 Difference]: Finished difference. Result has 366 places, 457 transitions, 6169 flow [2024-06-20 17:23:28,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5894, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6169, PETRI_PLACES=366, PETRI_TRANSITIONS=457} [2024-06-20 17:23:28,398 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-20 17:23:28,398 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 457 transitions, 6169 flow [2024-06-20 17:23:28,398 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) [2024-06-20 17:23:28,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:28,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:28,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:23:28,399 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)] === [2024-06-20 17:23:28,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash -382152650, now seen corresponding path program 12 times [2024-06-20 17:23:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:28,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818058842] [2024-06-20 17:23:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:28,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:29,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:29,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818058842] [2024-06-20 17:23:29,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818058842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:29,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:29,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:29,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744471381] [2024-06-20 17:23:29,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:29,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:29,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:29,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:29,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:29,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:29,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 457 transitions, 6169 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) [2024-06-20 17:23:29,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:29,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:29,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:30,480 INFO L124 PetriNetUnfolderBase]: 3745/5794 cut-off events. [2024-06-20 17:23:30,480 INFO L125 PetriNetUnfolderBase]: For 676746/676778 co-relation queries the response was YES. [2024-06-20 17:23:30,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46672 conditions, 5794 events. 3745/5794 cut-off events. For 676746/676778 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32922 event pairs, 780 based on Foata normal form. 25/5816 useless extension candidates. Maximal degree in co-relation 46505. Up to 5645 conditions per place. [2024-06-20 17:23:30,572 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 414 selfloop transitions, 61 changer transitions 0/478 dead transitions. [2024-06-20 17:23:30,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 478 transitions, 7189 flow [2024-06-20 17:23:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 17:23:30,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:23:30,573 INFO L175 Difference]: Start difference. First operand has 366 places, 457 transitions, 6169 flow. Second operand 7 states and 115 transitions. [2024-06-20 17:23:30,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 478 transitions, 7189 flow [2024-06-20 17:23:32,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 478 transitions, 6909 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:32,881 INFO L231 Difference]: Finished difference. Result has 367 places, 457 transitions, 6021 flow [2024-06-20 17:23:32,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5889, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6021, PETRI_PLACES=367, PETRI_TRANSITIONS=457} [2024-06-20 17:23:32,882 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-20 17:23:32,882 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 457 transitions, 6021 flow [2024-06-20 17:23:32,882 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) [2024-06-20 17:23:32,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:32,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:32,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:23:32,883 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)] === [2024-06-20 17:23:32,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:32,883 INFO L85 PathProgramCache]: Analyzing trace with hash -381736754, now seen corresponding path program 12 times [2024-06-20 17:23:32,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:32,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515965234] [2024-06-20 17:23:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:32,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:33,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:33,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515965234] [2024-06-20 17:23:33,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515965234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:33,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:33,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:33,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977988466] [2024-06-20 17:23:33,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:33,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:33,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:33,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:33,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:33,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:33,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 457 transitions, 6021 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) [2024-06-20 17:23:33,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:33,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:33,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:35,095 INFO L124 PetriNetUnfolderBase]: 3739/5788 cut-off events. [2024-06-20 17:23:35,095 INFO L125 PetriNetUnfolderBase]: For 656555/656555 co-relation queries the response was YES. [2024-06-20 17:23:35,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46011 conditions, 5788 events. 3739/5788 cut-off events. For 656555/656555 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32875 event pairs, 793 based on Foata normal form. 2/5789 useless extension candidates. Maximal degree in co-relation 45845. Up to 5711 conditions per place. [2024-06-20 17:23:35,171 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 438 selfloop transitions, 32 changer transitions 0/473 dead transitions. [2024-06-20 17:23:35,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 473 transitions, 7017 flow [2024-06-20 17:23:35,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-20 17:23:35,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-20 17:23:35,172 INFO L175 Difference]: Start difference. First operand has 367 places, 457 transitions, 6021 flow. Second operand 7 states and 108 transitions. [2024-06-20 17:23:35,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 473 transitions, 7017 flow [2024-06-20 17:23:37,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 473 transitions, 6891 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:37,525 INFO L231 Difference]: Finished difference. Result has 369 places, 457 transitions, 5969 flow [2024-06-20 17:23:37,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5895, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5969, PETRI_PLACES=369, PETRI_TRANSITIONS=457} [2024-06-20 17:23:37,525 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-20 17:23:37,525 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 457 transitions, 5969 flow [2024-06-20 17:23:37,526 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) [2024-06-20 17:23:37,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:37,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:37,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:23:37,526 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)] === [2024-06-20 17:23:37,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -889059546, now seen corresponding path program 2 times [2024-06-20 17:23:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:37,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439364848] [2024-06-20 17:23:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:37,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:38,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:38,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439364848] [2024-06-20 17:23:38,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439364848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:38,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:38,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:23:38,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329157298] [2024-06-20 17:23:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:23:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:38,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:23:38,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:23:38,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:38,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 457 transitions, 5969 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) [2024-06-20 17:23:38,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:38,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:38,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:40,054 INFO L124 PetriNetUnfolderBase]: 3747/5796 cut-off events. [2024-06-20 17:23:40,055 INFO L125 PetriNetUnfolderBase]: For 655770/655774 co-relation queries the response was YES. [2024-06-20 17:23:40,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46012 conditions, 5796 events. 3747/5796 cut-off events. For 655770/655774 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 32944 event pairs, 774 based on Foata normal form. 6/5801 useless extension candidates. Maximal degree in co-relation 45846. Up to 5706 conditions per place. [2024-06-20 17:23:40,143 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 431 selfloop transitions, 43 changer transitions 0/477 dead transitions. [2024-06-20 17:23:40,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 477 transitions, 7023 flow [2024-06-20 17:23:40,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-20 17:23:40,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-20 17:23:40,145 INFO L175 Difference]: Start difference. First operand has 369 places, 457 transitions, 5969 flow. Second operand 7 states and 111 transitions. [2024-06-20 17:23:40,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 477 transitions, 7023 flow [2024-06-20 17:23:42,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 477 transitions, 6863 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:42,524 INFO L231 Difference]: Finished difference. Result has 369 places, 459 transitions, 5955 flow [2024-06-20 17:23:42,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5955, PETRI_PLACES=369, PETRI_TRANSITIONS=459} [2024-06-20 17:23:42,524 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-20 17:23:42,524 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 459 transitions, 5955 flow [2024-06-20 17:23:42,524 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) [2024-06-20 17:23:42,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:42,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:42,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:23:42,525 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)] === [2024-06-20 17:23:42,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:42,525 INFO L85 PathProgramCache]: Analyzing trace with hash -159540596, now seen corresponding path program 3 times [2024-06-20 17:23:42,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:42,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936529268] [2024-06-20 17:23:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:42,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:43,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:43,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936529268] [2024-06-20 17:23:43,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936529268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:43,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:43,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:23:43,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656806363] [2024-06-20 17:23:43,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:43,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:23:43,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:43,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:23:43,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:23:43,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:43,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 459 transitions, 5955 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) [2024-06-20 17:23:43,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:43,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:43,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:44,968 INFO L124 PetriNetUnfolderBase]: 3755/5808 cut-off events. [2024-06-20 17:23:44,968 INFO L125 PetriNetUnfolderBase]: For 656962/656966 co-relation queries the response was YES. [2024-06-20 17:23:45,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46128 conditions, 5808 events. 3755/5808 cut-off events. For 656962/656966 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33005 event pairs, 774 based on Foata normal form. 6/5813 useless extension candidates. Maximal degree in co-relation 45963. Up to 5738 conditions per place. [2024-06-20 17:23:45,052 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 444 selfloop transitions, 31 changer transitions 0/478 dead transitions. [2024-06-20 17:23:45,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 478 transitions, 7013 flow [2024-06-20 17:23:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:23:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:23:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 17:23:45,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 17:23:45,053 INFO L175 Difference]: Start difference. First operand has 369 places, 459 transitions, 5955 flow. Second operand 6 states and 99 transitions. [2024-06-20 17:23:45,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 478 transitions, 7013 flow [2024-06-20 17:23:47,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 478 transitions, 6881 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:47,589 INFO L231 Difference]: Finished difference. Result has 370 places, 461 transitions, 5946 flow [2024-06-20 17:23:47,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5827, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5946, PETRI_PLACES=370, PETRI_TRANSITIONS=461} [2024-06-20 17:23:47,590 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-20 17:23:47,590 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 461 transitions, 5946 flow [2024-06-20 17:23:47,590 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) [2024-06-20 17:23:47,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:47,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:47,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:23:47,591 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)] === [2024-06-20 17:23:47,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:47,591 INFO L85 PathProgramCache]: Analyzing trace with hash -145255796, now seen corresponding path program 4 times [2024-06-20 17:23:47,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:47,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132838023] [2024-06-20 17:23:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:47,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:48,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:48,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132838023] [2024-06-20 17:23:48,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132838023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:48,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:48,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:23:48,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618303195] [2024-06-20 17:23:48,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:48,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:23:48,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:48,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:23:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:23:48,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:23:48,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 461 transitions, 5946 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) [2024-06-20 17:23:48,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:48,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:23:48,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:50,150 INFO L124 PetriNetUnfolderBase]: 3750/5801 cut-off events. [2024-06-20 17:23:50,151 INFO L125 PetriNetUnfolderBase]: For 648115/648119 co-relation queries the response was YES. [2024-06-20 17:23:50,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45779 conditions, 5801 events. 3750/5801 cut-off events. For 648115/648119 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 32999 event pairs, 773 based on Foata normal form. 6/5806 useless extension candidates. Maximal degree in co-relation 45613. Up to 5717 conditions per place. [2024-06-20 17:23:50,234 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 444 selfloop transitions, 35 changer transitions 0/482 dead transitions. [2024-06-20 17:23:50,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 482 transitions, 7016 flow [2024-06-20 17:23:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-20 17:23:50,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-20 17:23:50,235 INFO L175 Difference]: Start difference. First operand has 370 places, 461 transitions, 5946 flow. Second operand 7 states and 111 transitions. [2024-06-20 17:23:50,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 482 transitions, 7016 flow [2024-06-20 17:23:52,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 482 transitions, 6913 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 17:23:52,512 INFO L231 Difference]: Finished difference. Result has 373 places, 463 transitions, 5974 flow [2024-06-20 17:23:52,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5843, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5974, PETRI_PLACES=373, PETRI_TRANSITIONS=463} [2024-06-20 17:23:52,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-20 17:23:52,512 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 463 transitions, 5974 flow [2024-06-20 17:23:52,512 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) [2024-06-20 17:23:52,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:52,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:52,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:23:52,513 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)] === [2024-06-20 17:23:52,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1125583372, now seen corresponding path program 1 times [2024-06-20 17:23:52,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:52,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099876289] [2024-06-20 17:23:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:52,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:53,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099876289] [2024-06-20 17:23:53,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099876289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:53,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:53,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538657330] [2024-06-20 17:23:53,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:53,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:53,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:53,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:53,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:23:53,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 463 transitions, 5974 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:53,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:53,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:23:53,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:55,164 INFO L124 PetriNetUnfolderBase]: 3734/5838 cut-off events. [2024-06-20 17:23:55,164 INFO L125 PetriNetUnfolderBase]: For 749167/749199 co-relation queries the response was YES. [2024-06-20 17:23:55,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47466 conditions, 5838 events. 3734/5838 cut-off events. For 749167/749199 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33847 event pairs, 755 based on Foata normal form. 10/5842 useless extension candidates. Maximal degree in co-relation 47299. Up to 5363 conditions per place. [2024-06-20 17:23:55,248 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 393 selfloop transitions, 56 changer transitions 0/503 dead transitions. [2024-06-20 17:23:55,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 503 transitions, 7294 flow [2024-06-20 17:23:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:23:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:23:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:23:55,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-20 17:23:55,249 INFO L175 Difference]: Start difference. First operand has 373 places, 463 transitions, 5974 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:23:55,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 503 transitions, 7294 flow [2024-06-20 17:23:57,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 503 transitions, 7179 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:57,682 INFO L231 Difference]: Finished difference. Result has 377 places, 465 transitions, 6017 flow [2024-06-20 17:23:57,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5859, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6017, PETRI_PLACES=377, PETRI_TRANSITIONS=465} [2024-06-20 17:23:57,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-20 17:23:57,683 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 465 transitions, 6017 flow [2024-06-20 17:23:57,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:57,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:57,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:57,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:23:57,683 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)] === [2024-06-20 17:23:57,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:57,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1125522922, now seen corresponding path program 2 times [2024-06-20 17:23:57,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:57,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113541657] [2024-06-20 17:23:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:57,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:58,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:58,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113541657] [2024-06-20 17:23:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113541657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:58,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:58,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:58,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295923286] [2024-06-20 17:23:58,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:58,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:58,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:58,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:58,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:23:58,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 465 transitions, 6017 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:58,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:58,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:23:58,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:00,265 INFO L124 PetriNetUnfolderBase]: 3787/5917 cut-off events. [2024-06-20 17:24:00,265 INFO L125 PetriNetUnfolderBase]: For 766858/766875 co-relation queries the response was YES. [2024-06-20 17:24:00,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48045 conditions, 5917 events. 3787/5917 cut-off events. For 766858/766875 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34304 event pairs, 795 based on Foata normal form. 12/5925 useless extension candidates. Maximal degree in co-relation 47877. Up to 5538 conditions per place. [2024-06-20 17:24:00,339 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 378 selfloop transitions, 68 changer transitions 0/500 dead transitions. [2024-06-20 17:24:00,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 500 transitions, 7266 flow [2024-06-20 17:24:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:00,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:24:00,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:24:00,340 INFO L175 Difference]: Start difference. First operand has 377 places, 465 transitions, 6017 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:24:00,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 500 transitions, 7266 flow [2024-06-20 17:24:02,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 500 transitions, 7186 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:02,394 INFO L231 Difference]: Finished difference. Result has 381 places, 469 transitions, 6123 flow [2024-06-20 17:24:02,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5940, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6123, PETRI_PLACES=381, PETRI_TRANSITIONS=469} [2024-06-20 17:24:02,394 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-20 17:24:02,394 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 469 transitions, 6123 flow [2024-06-20 17:24:02,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:02,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:02,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:02,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:24:02,395 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)] === [2024-06-20 17:24:02,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1122726412, now seen corresponding path program 3 times [2024-06-20 17:24:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:02,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704475050] [2024-06-20 17:24:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:02,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:03,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:03,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704475050] [2024-06-20 17:24:03,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704475050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:03,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:03,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:03,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388445901] [2024-06-20 17:24:03,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:03,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:03,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:03,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:03,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:03,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:24:03,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 469 transitions, 6123 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:03,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:03,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:24:03,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:04,984 INFO L124 PetriNetUnfolderBase]: 3816/5966 cut-off events. [2024-06-20 17:24:04,984 INFO L125 PetriNetUnfolderBase]: For 793031/793097 co-relation queries the response was YES. [2024-06-20 17:24:05,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48904 conditions, 5966 events. 3816/5966 cut-off events. For 793031/793097 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34747 event pairs, 808 based on Foata normal form. 11/5969 useless extension candidates. Maximal degree in co-relation 48734. Up to 5639 conditions per place. [2024-06-20 17:24:05,073 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 397 selfloop transitions, 46 changer transitions 0/497 dead transitions. [2024-06-20 17:24:05,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 497 transitions, 7149 flow [2024-06-20 17:24:05,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:24:05,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:24:05,074 INFO L175 Difference]: Start difference. First operand has 381 places, 469 transitions, 6123 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:24:05,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 497 transitions, 7149 flow [2024-06-20 17:24:07,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 497 transitions, 7037 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:07,304 INFO L231 Difference]: Finished difference. Result has 385 places, 470 transitions, 6134 flow [2024-06-20 17:24:07,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6011, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6134, PETRI_PLACES=385, PETRI_TRANSITIONS=470} [2024-06-20 17:24:07,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-20 17:24:07,305 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 470 transitions, 6134 flow [2024-06-20 17:24:07,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:07,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:07,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:24:07,306 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)] === [2024-06-20 17:24:07,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash 759654762, now seen corresponding path program 4 times [2024-06-20 17:24:07,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:07,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556539996] [2024-06-20 17:24:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:08,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556539996] [2024-06-20 17:24:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556539996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:08,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:08,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:08,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523889829] [2024-06-20 17:24:08,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:08,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:08,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:08,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:08,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:08,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:24:08,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 470 transitions, 6134 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:08,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:08,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:24:08,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:09,954 INFO L124 PetriNetUnfolderBase]: 3866/6044 cut-off events. [2024-06-20 17:24:09,955 INFO L125 PetriNetUnfolderBase]: For 810755/810757 co-relation queries the response was YES. [2024-06-20 17:24:10,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49488 conditions, 6044 events. 3866/6044 cut-off events. For 810755/810757 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 35271 event pairs, 809 based on Foata normal form. 15/6053 useless extension candidates. Maximal degree in co-relation 49317. Up to 5730 conditions per place. [2024-06-20 17:24:10,048 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 34 changer transitions 0/496 dead transitions. [2024-06-20 17:24:10,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 496 transitions, 7188 flow [2024-06-20 17:24:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 17:24:10,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-20 17:24:10,049 INFO L175 Difference]: Start difference. First operand has 385 places, 470 transitions, 6134 flow. Second operand 9 states and 141 transitions. [2024-06-20 17:24:10,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 496 transitions, 7188 flow [2024-06-20 17:24:12,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 496 transitions, 7064 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:24:12,196 INFO L231 Difference]: Finished difference. Result has 386 places, 471 transitions, 6112 flow [2024-06-20 17:24:12,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6010, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6112, PETRI_PLACES=386, PETRI_TRANSITIONS=471} [2024-06-20 17:24:12,196 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-20 17:24:12,196 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 471 transitions, 6112 flow [2024-06-20 17:24:12,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:12,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:12,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:12,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:24:12,197 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)] === [2024-06-20 17:24:12,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:12,197 INFO L85 PathProgramCache]: Analyzing trace with hash 759839460, now seen corresponding path program 1 times [2024-06-20 17:24:12,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:12,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769914363] [2024-06-20 17:24:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:12,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:13,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:13,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769914363] [2024-06-20 17:24:13,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769914363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:13,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:13,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:13,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198541115] [2024-06-20 17:24:13,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:13,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:13,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:13,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:13,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:13,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:24:13,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 471 transitions, 6112 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) [2024-06-20 17:24:13,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:13,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:24:13,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:14,643 INFO L124 PetriNetUnfolderBase]: 4008/6199 cut-off events. [2024-06-20 17:24:14,643 INFO L125 PetriNetUnfolderBase]: For 769485/769485 co-relation queries the response was YES. [2024-06-20 17:24:14,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50584 conditions, 6199 events. 4008/6199 cut-off events. For 769485/769485 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 35689 event pairs, 850 based on Foata normal form. 2/6200 useless extension candidates. Maximal degree in co-relation 50412. Up to 6132 conditions per place. [2024-06-20 17:24:14,734 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 459 selfloop transitions, 28 changer transitions 0/490 dead transitions. [2024-06-20 17:24:14,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 490 transitions, 7186 flow [2024-06-20 17:24:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:24:14,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:24:14,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-20 17:24:14,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36875 [2024-06-20 17:24:14,735 INFO L175 Difference]: Start difference. First operand has 386 places, 471 transitions, 6112 flow. Second operand 8 states and 118 transitions. [2024-06-20 17:24:14,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 490 transitions, 7186 flow [2024-06-20 17:24:17,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 490 transitions, 7114 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:17,428 INFO L231 Difference]: Finished difference. Result has 387 places, 473 transitions, 6151 flow [2024-06-20 17:24:17,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6040, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6151, PETRI_PLACES=387, PETRI_TRANSITIONS=473} [2024-06-20 17:24:17,428 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-20 17:24:17,428 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 473 transitions, 6151 flow [2024-06-20 17:24:17,428 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) [2024-06-20 17:24:17,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:17,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:17,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:24:17,429 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)] === [2024-06-20 17:24:17,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:17,429 INFO L85 PathProgramCache]: Analyzing trace with hash -375235124, now seen corresponding path program 2 times [2024-06-20 17:24:17,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:17,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692884007] [2024-06-20 17:24:17,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:17,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:18,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:18,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692884007] [2024-06-20 17:24:18,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692884007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:18,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:18,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:18,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792945219] [2024-06-20 17:24:18,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:18,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:18,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:24:18,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 473 transitions, 6151 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) [2024-06-20 17:24:18,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:18,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:24:18,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:19,836 INFO L124 PetriNetUnfolderBase]: 4016/6211 cut-off events. [2024-06-20 17:24:19,836 INFO L125 PetriNetUnfolderBase]: For 784350/784350 co-relation queries the response was YES. [2024-06-20 17:24:19,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50817 conditions, 6211 events. 4016/6211 cut-off events. For 784350/784350 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35724 event pairs, 845 based on Foata normal form. 2/6212 useless extension candidates. Maximal degree in co-relation 50644. Up to 6128 conditions per place. [2024-06-20 17:24:19,926 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 453 selfloop transitions, 33 changer transitions 0/489 dead transitions. [2024-06-20 17:24:19,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 489 transitions, 7217 flow [2024-06-20 17:24:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:24:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:24:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 17:24:19,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:24:19,927 INFO L175 Difference]: Start difference. First operand has 387 places, 473 transitions, 6151 flow. Second operand 6 states and 96 transitions. [2024-06-20 17:24:19,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 489 transitions, 7217 flow [2024-06-20 17:24:22,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 489 transitions, 7122 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:22,625 INFO L231 Difference]: Finished difference. Result has 387 places, 475 transitions, 6186 flow [2024-06-20 17:24:22,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6056, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6186, PETRI_PLACES=387, PETRI_TRANSITIONS=475} [2024-06-20 17:24:22,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-20 17:24:22,626 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 475 transitions, 6186 flow [2024-06-20 17:24:22,626 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) [2024-06-20 17:24:22,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:22,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:22,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:24:22,627 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)] === [2024-06-20 17:24:22,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash -375235372, now seen corresponding path program 1 times [2024-06-20 17:24:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566280482] [2024-06-20 17:24:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:23,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:23,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566280482] [2024-06-20 17:24:23,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566280482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:23,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:23,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:23,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27405863] [2024-06-20 17:24:23,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:23,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:23,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:23,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:23,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:24:23,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 475 transitions, 6186 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) [2024-06-20 17:24:23,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:23,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:24:23,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:25,153 INFO L124 PetriNetUnfolderBase]: 4011/6204 cut-off events. [2024-06-20 17:24:25,154 INFO L125 PetriNetUnfolderBase]: For 791030/791030 co-relation queries the response was YES. [2024-06-20 17:24:25,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50866 conditions, 6204 events. 4011/6204 cut-off events. For 791030/791030 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35681 event pairs, 862 based on Foata normal form. 1/6204 useless extension candidates. Maximal degree in co-relation 50692. Up to 6117 conditions per place. [2024-06-20 17:24:25,241 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 453 selfloop transitions, 36 changer transitions 0/492 dead transitions. [2024-06-20 17:24:25,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 492 transitions, 7222 flow [2024-06-20 17:24:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:24:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:24:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 17:24:25,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:24:25,242 INFO L175 Difference]: Start difference. First operand has 387 places, 475 transitions, 6186 flow. Second operand 6 states and 102 transitions. [2024-06-20 17:24:25,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 492 transitions, 7222 flow [2024-06-20 17:24:28,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 492 transitions, 7084 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-20 17:24:28,143 INFO L231 Difference]: Finished difference. Result has 389 places, 475 transitions, 6138 flow [2024-06-20 17:24:28,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6048, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6138, PETRI_PLACES=389, PETRI_TRANSITIONS=475} [2024-06-20 17:24:28,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-20 17:24:28,144 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 475 transitions, 6138 flow [2024-06-20 17:24:28,144 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) [2024-06-20 17:24:28,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:28,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:28,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:24:28,144 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)] === [2024-06-20 17:24:28,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash -145249844, now seen corresponding path program 3 times [2024-06-20 17:24:28,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:28,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017044147] [2024-06-20 17:24:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:28,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:29,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:29,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017044147] [2024-06-20 17:24:29,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017044147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:29,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:29,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:29,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479014215] [2024-06-20 17:24:29,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:29,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:29,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:29,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:24:29,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 475 transitions, 6138 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) [2024-06-20 17:24:29,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:29,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:24:29,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:30,771 INFO L124 PetriNetUnfolderBase]: 4006/6197 cut-off events. [2024-06-20 17:24:30,772 INFO L125 PetriNetUnfolderBase]: For 785087/785087 co-relation queries the response was YES. [2024-06-20 17:24:30,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50440 conditions, 6197 events. 4006/6197 cut-off events. For 785087/785087 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35601 event pairs, 867 based on Foata normal form. 2/6198 useless extension candidates. Maximal degree in co-relation 50265. Up to 6152 conditions per place. [2024-06-20 17:24:30,846 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 470 selfloop transitions, 15 changer transitions 0/488 dead transitions. [2024-06-20 17:24:30,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 488 transitions, 7188 flow [2024-06-20 17:24:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:24:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:24:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-20 17:24:30,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:24:30,847 INFO L175 Difference]: Start difference. First operand has 389 places, 475 transitions, 6138 flow. Second operand 6 states and 90 transitions. [2024-06-20 17:24:30,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 488 transitions, 7188 flow [2024-06-20 17:24:32,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 488 transitions, 7102 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:32,857 INFO L231 Difference]: Finished difference. Result has 389 places, 477 transitions, 6141 flow [2024-06-20 17:24:32,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6141, PETRI_PLACES=389, PETRI_TRANSITIONS=477} [2024-06-20 17:24:32,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-20 17:24:32,857 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 477 transitions, 6141 flow [2024-06-20 17:24:32,857 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) [2024-06-20 17:24:32,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:32,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:32,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:24:32,858 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)] === [2024-06-20 17:24:32,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash -381906572, now seen corresponding path program 5 times [2024-06-20 17:24:32,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:32,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607443183] [2024-06-20 17:24:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:32,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:33,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:33,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607443183] [2024-06-20 17:24:33,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607443183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:33,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:33,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:33,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549721760] [2024-06-20 17:24:33,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:33,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:33,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:34,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 17:24:34,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 477 transitions, 6141 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:34,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:34,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 17:24:34,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:35,519 INFO L124 PetriNetUnfolderBase]: 3886/6078 cut-off events. [2024-06-20 17:24:35,519 INFO L125 PetriNetUnfolderBase]: For 817284/817284 co-relation queries the response was YES. [2024-06-20 17:24:35,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49203 conditions, 6078 events. 3886/6078 cut-off events. For 817284/817284 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35546 event pairs, 787 based on Foata normal form. 14/6088 useless extension candidates. Maximal degree in co-relation 49028. Up to 5731 conditions per place. [2024-06-20 17:24:35,607 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 419 selfloop transitions, 37 changer transitions 0/510 dead transitions. [2024-06-20 17:24:35,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 510 transitions, 7247 flow [2024-06-20 17:24:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:24:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:24:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:24:35,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:24:35,608 INFO L175 Difference]: Start difference. First operand has 389 places, 477 transitions, 6141 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:24:35,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 510 transitions, 7247 flow [2024-06-20 17:24:38,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 510 transitions, 7174 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 17:24:38,223 INFO L231 Difference]: Finished difference. Result has 393 places, 478 transitions, 6181 flow [2024-06-20 17:24:38,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6181, PETRI_PLACES=393, PETRI_TRANSITIONS=478} [2024-06-20 17:24:38,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-20 17:24:38,223 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 478 transitions, 6181 flow [2024-06-20 17:24:38,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:38,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:38,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:38,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:24:38,224 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)] === [2024-06-20 17:24:38,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:38,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1482344394, now seen corresponding path program 1 times [2024-06-20 17:24:38,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:38,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402765892] [2024-06-20 17:24:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:38,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:39,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:39,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402765892] [2024-06-20 17:24:39,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402765892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:39,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:39,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:24:39,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950161383] [2024-06-20 17:24:39,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:39,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:24:39,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:39,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:24:39,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:24:39,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:24:39,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 478 transitions, 6181 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:39,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:39,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:24:39,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:41,106 INFO L124 PetriNetUnfolderBase]: 4109/6354 cut-off events. [2024-06-20 17:24:41,106 INFO L125 PetriNetUnfolderBase]: For 842676/842680 co-relation queries the response was YES. [2024-06-20 17:24:41,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51934 conditions, 6354 events. 4109/6354 cut-off events. For 842676/842680 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36568 event pairs, 742 based on Foata normal form. 12/6365 useless extension candidates. Maximal degree in co-relation 51758. Up to 5800 conditions per place. [2024-06-20 17:24:41,205 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 430 selfloop transitions, 92 changer transitions 0/525 dead transitions. [2024-06-20 17:24:41,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 525 transitions, 7679 flow [2024-06-20 17:24:41,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:24:41,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 17:24:41,206 INFO L175 Difference]: Start difference. First operand has 393 places, 478 transitions, 6181 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:24:41,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 525 transitions, 7679 flow [2024-06-20 17:24:43,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 525 transitions, 7599 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:43,661 INFO L231 Difference]: Finished difference. Result has 397 places, 484 transitions, 6379 flow [2024-06-20 17:24:43,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6101, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6379, PETRI_PLACES=397, PETRI_TRANSITIONS=484} [2024-06-20 17:24:43,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-20 17:24:43,661 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 484 transitions, 6379 flow [2024-06-20 17:24:43,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:43,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:43,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:43,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:24:43,662 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)] === [2024-06-20 17:24:43,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:43,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1489753704, now seen corresponding path program 2 times [2024-06-20 17:24:43,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:43,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760675496] [2024-06-20 17:24:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:43,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:44,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:44,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760675496] [2024-06-20 17:24:44,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760675496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:44,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:44,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:24:44,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607917618] [2024-06-20 17:24:44,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:44,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:24:44,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:44,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:24:44,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:24:44,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:24:44,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 484 transitions, 6379 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:44,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:44,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:24:44,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:46,656 INFO L124 PetriNetUnfolderBase]: 4225/6530 cut-off events. [2024-06-20 17:24:46,656 INFO L125 PetriNetUnfolderBase]: For 921928/921932 co-relation queries the response was YES. [2024-06-20 17:24:46,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54625 conditions, 6530 events. 4225/6530 cut-off events. For 921928/921932 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 37936 event pairs, 874 based on Foata normal form. 12/6541 useless extension candidates. Maximal degree in co-relation 54447. Up to 6104 conditions per place. [2024-06-20 17:24:46,758 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 438 selfloop transitions, 89 changer transitions 0/530 dead transitions. [2024-06-20 17:24:46,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 530 transitions, 7906 flow [2024-06-20 17:24:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:24:46,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:24:46,759 INFO L175 Difference]: Start difference. First operand has 397 places, 484 transitions, 6379 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:24:46,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 530 transitions, 7906 flow [2024-06-20 17:24:49,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 530 transitions, 7791 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 17:24:49,769 INFO L231 Difference]: Finished difference. Result has 403 places, 490 transitions, 6557 flow [2024-06-20 17:24:49,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6264, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6557, PETRI_PLACES=403, PETRI_TRANSITIONS=490} [2024-06-20 17:24:49,770 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-20 17:24:49,770 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 490 transitions, 6557 flow [2024-06-20 17:24:49,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:49,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:49,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:49,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:24:49,770 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)] === [2024-06-20 17:24:49,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:49,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1489763004, now seen corresponding path program 3 times [2024-06-20 17:24:49,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:49,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985538768] [2024-06-20 17:24:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:49,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:50,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985538768] [2024-06-20 17:24:50,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985538768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:50,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:50,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:24:50,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454728813] [2024-06-20 17:24:50,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:50,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:24:50,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:24:50,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:24:51,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:24:51,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 490 transitions, 6557 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:51,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:51,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:24:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:52,703 INFO L124 PetriNetUnfolderBase]: 4197/6490 cut-off events. [2024-06-20 17:24:52,703 INFO L125 PetriNetUnfolderBase]: For 898379/898383 co-relation queries the response was YES. [2024-06-20 17:24:52,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53619 conditions, 6490 events. 4197/6490 cut-off events. For 898379/898383 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 37678 event pairs, 878 based on Foata normal form. 16/6505 useless extension candidates. Maximal degree in co-relation 53438. Up to 6142 conditions per place. [2024-06-20 17:24:52,804 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 432 selfloop transitions, 90 changer transitions 0/525 dead transitions. [2024-06-20 17:24:52,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 525 transitions, 7754 flow [2024-06-20 17:24:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 17:24:52,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-20 17:24:52,805 INFO L175 Difference]: Start difference. First operand has 403 places, 490 transitions, 6557 flow. Second operand 9 states and 149 transitions. [2024-06-20 17:24:52,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 525 transitions, 7754 flow [2024-06-20 17:24:55,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 525 transitions, 7621 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:55,915 INFO L231 Difference]: Finished difference. Result has 407 places, 490 transitions, 6609 flow [2024-06-20 17:24:55,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6609, PETRI_PLACES=407, PETRI_TRANSITIONS=490} [2024-06-20 17:24:55,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-20 17:24:55,916 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 490 transitions, 6609 flow [2024-06-20 17:24:55,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:55,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:55,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:55,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:24:55,916 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)] === [2024-06-20 17:24:55,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:55,916 INFO L85 PathProgramCache]: Analyzing trace with hash 653415196, now seen corresponding path program 1 times [2024-06-20 17:24:55,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:55,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114125653] [2024-06-20 17:24:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:55,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:56,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:56,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114125653] [2024-06-20 17:24:56,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114125653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:56,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:56,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:56,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245445589] [2024-06-20 17:24:56,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:56,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:24:56,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 490 transitions, 6609 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) [2024-06-20 17:24:56,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:56,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:24:56,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:58,477 INFO L124 PetriNetUnfolderBase]: 4223/6527 cut-off events. [2024-06-20 17:24:58,477 INFO L125 PetriNetUnfolderBase]: For 873552/873558 co-relation queries the response was YES. [2024-06-20 17:24:58,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54440 conditions, 6527 events. 4223/6527 cut-off events. For 873552/873558 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 37950 event pairs, 884 based on Foata normal form. 8/6534 useless extension candidates. Maximal degree in co-relation 54257. Up to 6276 conditions per place. [2024-06-20 17:24:58,584 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 452 selfloop transitions, 75 changer transitions 0/530 dead transitions. [2024-06-20 17:24:58,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 530 transitions, 8141 flow [2024-06-20 17:24:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:58,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 17:24:58,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-20 17:24:58,585 INFO L175 Difference]: Start difference. First operand has 407 places, 490 transitions, 6609 flow. Second operand 9 states and 148 transitions. [2024-06-20 17:24:58,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 530 transitions, 8141 flow [2024-06-20 17:25:01,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 530 transitions, 7962 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:01,776 INFO L231 Difference]: Finished difference. Result has 409 places, 496 transitions, 6756 flow [2024-06-20 17:25:01,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6430, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6756, PETRI_PLACES=409, PETRI_TRANSITIONS=496} [2024-06-20 17:25:01,777 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-06-20 17:25:01,777 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 496 transitions, 6756 flow [2024-06-20 17:25:01,777 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) [2024-06-20 17:25:01,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:01,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:01,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:25:01,777 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)] === [2024-06-20 17:25:01,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1264193082, now seen corresponding path program 2 times [2024-06-20 17:25:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:01,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999495636] [2024-06-20 17:25:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:02,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:02,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999495636] [2024-06-20 17:25:02,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999495636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:02,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:02,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:02,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261775257] [2024-06-20 17:25:02,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:02,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:02,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:02,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:25:02,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 496 transitions, 6756 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) [2024-06-20 17:25:02,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:02,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:25:02,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:04,614 INFO L124 PetriNetUnfolderBase]: 4243/6555 cut-off events. [2024-06-20 17:25:04,614 INFO L125 PetriNetUnfolderBase]: For 893525/893531 co-relation queries the response was YES. [2024-06-20 17:25:04,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55171 conditions, 6555 events. 4243/6555 cut-off events. For 893525/893531 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 38074 event pairs, 874 based on Foata normal form. 8/6562 useless extension candidates. Maximal degree in co-relation 54987. Up to 6334 conditions per place. [2024-06-20 17:25:04,708 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 456 selfloop transitions, 73 changer transitions 0/532 dead transitions. [2024-06-20 17:25:04,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 532 transitions, 8033 flow [2024-06-20 17:25:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:25:04,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-20 17:25:04,709 INFO L175 Difference]: Start difference. First operand has 409 places, 496 transitions, 6756 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:25:04,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 532 transitions, 8033 flow [2024-06-20 17:25:07,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 532 transitions, 7829 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-20 17:25:07,383 INFO L231 Difference]: Finished difference. Result has 413 places, 502 transitions, 6831 flow [2024-06-20 17:25:07,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6575, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6831, PETRI_PLACES=413, PETRI_TRANSITIONS=502} [2024-06-20 17:25:07,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-20 17:25:07,383 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 502 transitions, 6831 flow [2024-06-20 17:25:07,384 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) [2024-06-20 17:25:07,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:07,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:07,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:25:07,384 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)] === [2024-06-20 17:25:07,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:07,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1264192896, now seen corresponding path program 1 times [2024-06-20 17:25:07,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:07,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082904901] [2024-06-20 17:25:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:07,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:08,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:08,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082904901] [2024-06-20 17:25:08,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082904901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:08,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:08,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979004753] [2024-06-20 17:25:08,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:08,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:08,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:08,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:25:08,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 502 transitions, 6831 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) [2024-06-20 17:25:08,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:08,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:25:08,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:10,075 INFO L124 PetriNetUnfolderBase]: 4310/6648 cut-off events. [2024-06-20 17:25:10,075 INFO L125 PetriNetUnfolderBase]: For 943743/943749 co-relation queries the response was YES. [2024-06-20 17:25:10,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56411 conditions, 6648 events. 4310/6648 cut-off events. For 943743/943749 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 38627 event pairs, 876 based on Foata normal form. 10/6657 useless extension candidates. Maximal degree in co-relation 56225. Up to 6232 conditions per place. [2024-06-20 17:25:10,165 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 443 selfloop transitions, 108 changer transitions 0/554 dead transitions. [2024-06-20 17:25:10,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 554 transitions, 8489 flow [2024-06-20 17:25:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:25:10,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 17:25:10,167 INFO L175 Difference]: Start difference. First operand has 413 places, 502 transitions, 6831 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:25:10,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 554 transitions, 8489 flow [2024-06-20 17:25:12,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 554 transitions, 8289 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 17:25:12,753 INFO L231 Difference]: Finished difference. Result has 417 places, 519 transitions, 7122 flow [2024-06-20 17:25:12,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6631, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7122, PETRI_PLACES=417, PETRI_TRANSITIONS=519} [2024-06-20 17:25:12,754 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-20 17:25:12,754 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 519 transitions, 7122 flow [2024-06-20 17:25:12,754 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) [2024-06-20 17:25:12,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:12,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:12,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:25:12,755 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)] === [2024-06-20 17:25:12,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:12,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061376, now seen corresponding path program 2 times [2024-06-20 17:25:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:12,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367972176] [2024-06-20 17:25:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:13,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367972176] [2024-06-20 17:25:13,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367972176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:13,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:13,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:13,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981156387] [2024-06-20 17:25:13,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:13,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:13,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:13,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:13,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:25:13,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 519 transitions, 7122 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) [2024-06-20 17:25:13,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:13,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:25:13,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:15,295 INFO L124 PetriNetUnfolderBase]: 4372/6734 cut-off events. [2024-06-20 17:25:15,295 INFO L125 PetriNetUnfolderBase]: For 989834/989840 co-relation queries the response was YES. [2024-06-20 17:25:15,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58813 conditions, 6734 events. 4372/6734 cut-off events. For 989834/989840 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39156 event pairs, 895 based on Foata normal form. 10/6743 useless extension candidates. Maximal degree in co-relation 58625. Up to 6380 conditions per place. [2024-06-20 17:25:15,409 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 452 selfloop transitions, 107 changer transitions 0/562 dead transitions. [2024-06-20 17:25:15,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 562 transitions, 8774 flow [2024-06-20 17:25:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:25:15,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:25:15,410 INFO L175 Difference]: Start difference. First operand has 417 places, 519 transitions, 7122 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:25:15,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 562 transitions, 8774 flow [2024-06-20 17:25:19,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 562 transitions, 8634 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-20 17:25:19,162 INFO L231 Difference]: Finished difference. Result has 424 places, 531 transitions, 7434 flow [2024-06-20 17:25:19,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7434, PETRI_PLACES=424, PETRI_TRANSITIONS=531} [2024-06-20 17:25:19,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-20 17:25:19,162 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 531 transitions, 7434 flow [2024-06-20 17:25:19,162 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) [2024-06-20 17:25:19,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:19,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:19,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:25:19,163 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)] === [2024-06-20 17:25:19,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:19,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061562, now seen corresponding path program 3 times [2024-06-20 17:25:19,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:19,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593763224] [2024-06-20 17:25:19,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:19,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:19,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:19,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593763224] [2024-06-20 17:25:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593763224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:19,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:19,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:19,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146198065] [2024-06-20 17:25:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:19,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:19,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:20,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:25:20,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 531 transitions, 7434 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) [2024-06-20 17:25:20,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:20,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:25:20,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:21,789 INFO L124 PetriNetUnfolderBase]: 4382/6748 cut-off events. [2024-06-20 17:25:21,789 INFO L125 PetriNetUnfolderBase]: For 995914/995920 co-relation queries the response was YES. [2024-06-20 17:25:21,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58950 conditions, 6748 events. 4382/6748 cut-off events. For 995914/995920 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39226 event pairs, 895 based on Foata normal form. 8/6755 useless extension candidates. Maximal degree in co-relation 58759. Up to 6569 conditions per place. [2024-06-20 17:25:21,895 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 488 selfloop transitions, 69 changer transitions 0/560 dead transitions. [2024-06-20 17:25:21,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 560 transitions, 8706 flow [2024-06-20 17:25:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 17:25:21,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 17:25:21,897 INFO L175 Difference]: Start difference. First operand has 424 places, 531 transitions, 7434 flow. Second operand 9 states and 138 transitions. [2024-06-20 17:25:21,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 560 transitions, 8706 flow [2024-06-20 17:25:25,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 560 transitions, 8526 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 17:25:25,178 INFO L231 Difference]: Finished difference. Result has 429 places, 534 transitions, 7478 flow [2024-06-20 17:25:25,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7254, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7478, PETRI_PLACES=429, PETRI_TRANSITIONS=534} [2024-06-20 17:25:25,178 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-20 17:25:25,179 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 534 transitions, 7478 flow [2024-06-20 17:25:25,179 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) [2024-06-20 17:25:25,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:25,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:25,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:25:25,179 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)] === [2024-06-20 17:25:25,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1086824226, now seen corresponding path program 3 times [2024-06-20 17:25:25,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:25,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475206145] [2024-06-20 17:25:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:25,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:25,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:25,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475206145] [2024-06-20 17:25:25,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475206145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:25,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:25,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:25,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186468119] [2024-06-20 17:25:25,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:25,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:25,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:25,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:25,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:26,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:25:26,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 534 transitions, 7478 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) [2024-06-20 17:25:26,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:26,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:25:26,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:27,824 INFO L124 PetriNetUnfolderBase]: 4370/6732 cut-off events. [2024-06-20 17:25:27,824 INFO L125 PetriNetUnfolderBase]: For 1000986/1000992 co-relation queries the response was YES. [2024-06-20 17:25:27,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58542 conditions, 6732 events. 4370/6732 cut-off events. For 1000986/1000992 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39128 event pairs, 889 based on Foata normal form. 10/6741 useless extension candidates. Maximal degree in co-relation 58349. Up to 6412 conditions per place. [2024-06-20 17:25:27,920 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 455 selfloop transitions, 104 changer transitions 0/562 dead transitions. [2024-06-20 17:25:27,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 562 transitions, 8696 flow [2024-06-20 17:25:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 17:25:27,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-20 17:25:27,921 INFO L175 Difference]: Start difference. First operand has 429 places, 534 transitions, 7478 flow. Second operand 9 states and 145 transitions. [2024-06-20 17:25:27,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 562 transitions, 8696 flow [2024-06-20 17:25:31,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 562 transitions, 8478 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-20 17:25:31,894 INFO L231 Difference]: Finished difference. Result has 433 places, 534 transitions, 7474 flow [2024-06-20 17:25:31,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7260, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7474, PETRI_PLACES=433, PETRI_TRANSITIONS=534} [2024-06-20 17:25:31,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-20 17:25:31,894 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 534 transitions, 7474 flow [2024-06-20 17:25:31,894 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) [2024-06-20 17:25:31,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:31,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:31,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:25:31,895 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)] === [2024-06-20 17:25:31,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:31,895 INFO L85 PathProgramCache]: Analyzing trace with hash 849941228, now seen corresponding path program 4 times [2024-06-20 17:25:31,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:31,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214806819] [2024-06-20 17:25:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:31,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:32,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:32,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214806819] [2024-06-20 17:25:32,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214806819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:32,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:32,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:32,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803242544] [2024-06-20 17:25:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:32,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:32,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:32,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:25:32,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 534 transitions, 7474 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) [2024-06-20 17:25:32,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:32,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:25:32,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:34,693 INFO L124 PetriNetUnfolderBase]: 4460/6857 cut-off events. [2024-06-20 17:25:34,693 INFO L125 PetriNetUnfolderBase]: For 1069064/1069066 co-relation queries the response was YES. [2024-06-20 17:25:34,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61114 conditions, 6857 events. 4460/6857 cut-off events. For 1069064/1069066 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 39884 event pairs, 886 based on Foata normal form. 4/6860 useless extension candidates. Maximal degree in co-relation 60920. Up to 6226 conditions per place. [2024-06-20 17:25:34,790 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 459 selfloop transitions, 120 changer transitions 0/582 dead transitions. [2024-06-20 17:25:34,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 582 transitions, 9798 flow [2024-06-20 17:25:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:25:34,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 17:25:34,791 INFO L175 Difference]: Start difference. First operand has 433 places, 534 transitions, 7474 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:25:34,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 582 transitions, 9798 flow [2024-06-20 17:25:38,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 582 transitions, 9570 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 17:25:38,713 INFO L231 Difference]: Finished difference. Result has 435 places, 549 transitions, 7994 flow [2024-06-20 17:25:38,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7246, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7994, PETRI_PLACES=435, PETRI_TRANSITIONS=549} [2024-06-20 17:25:38,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-20 17:25:38,714 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 549 transitions, 7994 flow [2024-06-20 17:25:38,714 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) [2024-06-20 17:25:38,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:38,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:38,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:25:38,714 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)] === [2024-06-20 17:25:38,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:38,714 INFO L85 PathProgramCache]: Analyzing trace with hash -67405860, now seen corresponding path program 5 times [2024-06-20 17:25:38,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:38,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196775989] [2024-06-20 17:25:38,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:38,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:39,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:39,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196775989] [2024-06-20 17:25:39,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196775989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:39,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:39,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:39,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318202698] [2024-06-20 17:25:39,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:39,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:39,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:39,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:39,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:39,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:25:39,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 549 transitions, 7994 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) [2024-06-20 17:25:39,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:39,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:25:39,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:41,729 INFO L124 PetriNetUnfolderBase]: 4480/6885 cut-off events. [2024-06-20 17:25:41,729 INFO L125 PetriNetUnfolderBase]: For 1096835/1096837 co-relation queries the response was YES. [2024-06-20 17:25:41,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62452 conditions, 6885 events. 4480/6885 cut-off events. For 1096835/1096837 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 40117 event pairs, 884 based on Foata normal form. 4/6888 useless extension candidates. Maximal degree in co-relation 62256. Up to 6564 conditions per place. [2024-06-20 17:25:41,844 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 486 selfloop transitions, 93 changer transitions 0/582 dead transitions. [2024-06-20 17:25:41,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 582 transitions, 9360 flow [2024-06-20 17:25:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 17:25:41,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-20 17:25:41,845 INFO L175 Difference]: Start difference. First operand has 435 places, 549 transitions, 7994 flow. Second operand 9 states and 143 transitions. [2024-06-20 17:25:41,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 582 transitions, 9360 flow [2024-06-20 17:25:46,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 582 transitions, 9121 flow, removed 91 selfloop flow, removed 3 redundant places. [2024-06-20 17:25:46,047 INFO L231 Difference]: Finished difference. Result has 441 places, 555 transitions, 8077 flow [2024-06-20 17:25:46,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7785, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8077, PETRI_PLACES=441, PETRI_TRANSITIONS=555} [2024-06-20 17:25:46,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-20 17:25:46,048 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 555 transitions, 8077 flow [2024-06-20 17:25:46,048 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) [2024-06-20 17:25:46,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:46,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:46,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:25:46,049 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)] === [2024-06-20 17:25:46,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:46,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1985133922, now seen corresponding path program 4 times [2024-06-20 17:25:46,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:46,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590598324] [2024-06-20 17:25:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:46,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:46,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590598324] [2024-06-20 17:25:46,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590598324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:46,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:46,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488385336] [2024-06-20 17:25:46,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:46,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:46,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:46,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:46,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:25:46,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 555 transitions, 8077 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) [2024-06-20 17:25:46,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:46,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:25:46,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:48,762 INFO L124 PetriNetUnfolderBase]: 4564/7001 cut-off events. [2024-06-20 17:25:48,762 INFO L125 PetriNetUnfolderBase]: For 1177494/1177496 co-relation queries the response was YES. [2024-06-20 17:25:48,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64536 conditions, 7001 events. 4564/7001 cut-off events. For 1177494/1177496 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 40748 event pairs, 902 based on Foata normal form. 6/7006 useless extension candidates. Maximal degree in co-relation 64338. Up to 6296 conditions per place. [2024-06-20 17:25:48,877 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 449 selfloop transitions, 147 changer transitions 0/599 dead transitions. [2024-06-20 17:25:48,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 599 transitions, 10091 flow [2024-06-20 17:25:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:25:48,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 17:25:48,878 INFO L175 Difference]: Start difference. First operand has 441 places, 555 transitions, 8077 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:25:48,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 599 transitions, 10091 flow [2024-06-20 17:25:53,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 599 transitions, 9853 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 17:25:53,114 INFO L231 Difference]: Finished difference. Result has 445 places, 565 transitions, 8500 flow [2024-06-20 17:25:53,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7839, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8500, PETRI_PLACES=445, PETRI_TRANSITIONS=565} [2024-06-20 17:25:53,115 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-20 17:25:53,115 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 565 transitions, 8500 flow [2024-06-20 17:25:53,115 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) [2024-06-20 17:25:53,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:53,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:53,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:25:53,115 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)] === [2024-06-20 17:25:53,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash -61954913, now seen corresponding path program 1 times [2024-06-20 17:25:53,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:53,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323969887] [2024-06-20 17:25:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:53,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:54,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:54,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323969887] [2024-06-20 17:25:54,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323969887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:54,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:54,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:54,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108528744] [2024-06-20 17:25:54,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:54,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:54,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:54,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:25:54,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 565 transitions, 8500 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) [2024-06-20 17:25:54,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:54,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:25:54,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:56,044 INFO L124 PetriNetUnfolderBase]: 4569/7006 cut-off events. [2024-06-20 17:25:56,044 INFO L125 PetriNetUnfolderBase]: For 1184963/1184967 co-relation queries the response was YES. [2024-06-20 17:25:56,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65671 conditions, 7006 events. 4569/7006 cut-off events. For 1184963/1184967 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 40831 event pairs, 928 based on Foata normal form. 5/7010 useless extension candidates. Maximal degree in co-relation 65471. Up to 6888 conditions per place. [2024-06-20 17:25:56,168 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 542 selfloop transitions, 55 changer transitions 0/600 dead transitions. [2024-06-20 17:25:56,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 600 transitions, 10133 flow [2024-06-20 17:25:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:25:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:25:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-20 17:25:56,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-06-20 17:25:56,169 INFO L175 Difference]: Start difference. First operand has 445 places, 565 transitions, 8500 flow. Second operand 10 states and 152 transitions. [2024-06-20 17:25:56,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 600 transitions, 10133 flow [2024-06-20 17:25:59,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 600 transitions, 9939 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-20 17:25:59,525 INFO L231 Difference]: Finished difference. Result has 451 places, 570 transitions, 8550 flow [2024-06-20 17:25:59,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8306, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8550, PETRI_PLACES=451, PETRI_TRANSITIONS=570} [2024-06-20 17:25:59,525 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 410 predicate places. [2024-06-20 17:25:59,526 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 570 transitions, 8550 flow [2024-06-20 17:25:59,526 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) [2024-06-20 17:25:59,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:59,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:59,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:25:59,526 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)] === [2024-06-20 17:25:59,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:59,527 INFO L85 PathProgramCache]: Analyzing trace with hash -62163450, now seen corresponding path program 6 times [2024-06-20 17:25:59,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:59,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397553837] [2024-06-20 17:25:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:59,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:00,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:00,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397553837] [2024-06-20 17:26:00,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397553837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:00,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:00,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:00,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725320160] [2024-06-20 17:26:00,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:00,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:00,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:00,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:00,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:26:00,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 570 transitions, 8550 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) [2024-06-20 17:26:00,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:00,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:26:00,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:02,348 INFO L124 PetriNetUnfolderBase]: 4589/7036 cut-off events. [2024-06-20 17:26:02,348 INFO L125 PetriNetUnfolderBase]: For 1220666/1220668 co-relation queries the response was YES. [2024-06-20 17:26:02,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65932 conditions, 7036 events. 4589/7036 cut-off events. For 1220666/1220668 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 40978 event pairs, 888 based on Foata normal form. 6/7041 useless extension candidates. Maximal degree in co-relation 65730. Up to 6374 conditions per place. [2024-06-20 17:26:02,458 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 465 selfloop transitions, 138 changer transitions 0/606 dead transitions. [2024-06-20 17:26:02,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 606 transitions, 10385 flow [2024-06-20 17:26:02,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:26:02,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:26:02,459 INFO L175 Difference]: Start difference. First operand has 451 places, 570 transitions, 8550 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:26:02,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 606 transitions, 10385 flow [2024-06-20 17:26:06,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 606 transitions, 10246 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 17:26:06,155 INFO L231 Difference]: Finished difference. Result has 454 places, 574 transitions, 8778 flow [2024-06-20 17:26:06,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8411, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8778, PETRI_PLACES=454, PETRI_TRANSITIONS=574} [2024-06-20 17:26:06,156 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-20 17:26:06,156 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 574 transitions, 8778 flow [2024-06-20 17:26:06,156 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) [2024-06-20 17:26:06,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:06,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:06,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:26:06,157 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)] === [2024-06-20 17:26:06,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1979592796, now seen corresponding path program 1 times [2024-06-20 17:26:06,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:06,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181719910] [2024-06-20 17:26:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:06,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:06,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181719910] [2024-06-20 17:26:06,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181719910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:06,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:06,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:06,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615811573] [2024-06-20 17:26:06,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:06,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:06,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:06,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:07,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:26:07,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 574 transitions, 8778 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) [2024-06-20 17:26:07,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:07,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:26:07,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:09,009 INFO L124 PetriNetUnfolderBase]: 4615/7070 cut-off events. [2024-06-20 17:26:09,009 INFO L125 PetriNetUnfolderBase]: For 1246229/1246233 co-relation queries the response was YES. [2024-06-20 17:26:09,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67245 conditions, 7070 events. 4615/7070 cut-off events. For 1246229/1246233 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 41191 event pairs, 928 based on Foata normal form. 6/7075 useless extension candidates. Maximal degree in co-relation 67041. Up to 6881 conditions per place. [2024-06-20 17:26:09,123 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 534 selfloop transitions, 72 changer transitions 0/609 dead transitions. [2024-06-20 17:26:09,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 609 transitions, 10526 flow [2024-06-20 17:26:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:26:09,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:26:09,124 INFO L175 Difference]: Start difference. First operand has 454 places, 574 transitions, 8778 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:26:09,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 609 transitions, 10526 flow [2024-06-20 17:26:13,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 609 transitions, 10221 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 17:26:13,251 INFO L231 Difference]: Finished difference. Result has 457 places, 580 transitions, 8833 flow [2024-06-20 17:26:13,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8473, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8833, PETRI_PLACES=457, PETRI_TRANSITIONS=580} [2024-06-20 17:26:13,252 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-20 17:26:13,252 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 580 transitions, 8833 flow [2024-06-20 17:26:13,252 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) [2024-06-20 17:26:13,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:13,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:13,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:26:13,252 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)] === [2024-06-20 17:26:13,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash -61864920, now seen corresponding path program 7 times [2024-06-20 17:26:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:13,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089045627] [2024-06-20 17:26:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:13,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:14,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:14,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089045627] [2024-06-20 17:26:14,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089045627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:14,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:14,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:14,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967880495] [2024-06-20 17:26:14,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:14,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:14,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:14,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:26:14,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 580 transitions, 8833 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) [2024-06-20 17:26:14,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:14,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:26:14,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:16,189 INFO L124 PetriNetUnfolderBase]: 4659/7133 cut-off events. [2024-06-20 17:26:16,189 INFO L125 PetriNetUnfolderBase]: For 1300401/1300403 co-relation queries the response was YES. [2024-06-20 17:26:16,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68238 conditions, 7133 events. 4659/7133 cut-off events. For 1300401/1300403 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 41587 event pairs, 889 based on Foata normal form. 6/7138 useless extension candidates. Maximal degree in co-relation 68033. Up to 6447 conditions per place. [2024-06-20 17:26:16,301 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 472 selfloop transitions, 142 changer transitions 0/617 dead transitions. [2024-06-20 17:26:16,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 617 transitions, 10791 flow [2024-06-20 17:26:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:26:16,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:26:16,303 INFO L175 Difference]: Start difference. First operand has 457 places, 580 transitions, 8833 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:26:16,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 617 transitions, 10791 flow [2024-06-20 17:26:20,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 617 transitions, 10589 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-20 17:26:20,335 INFO L231 Difference]: Finished difference. Result has 461 places, 587 transitions, 9073 flow [2024-06-20 17:26:20,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8631, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9073, PETRI_PLACES=461, PETRI_TRANSITIONS=587} [2024-06-20 17:26:20,336 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 420 predicate places. [2024-06-20 17:26:20,336 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 587 transitions, 9073 flow [2024-06-20 17:26:20,337 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) [2024-06-20 17:26:20,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:20,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:20,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:26:20,337 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)] === [2024-06-20 17:26:20,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash 859327160, now seen corresponding path program 2 times [2024-06-20 17:26:20,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:20,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461959090] [2024-06-20 17:26:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:21,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:21,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461959090] [2024-06-20 17:26:21,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461959090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:21,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:21,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:21,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827399246] [2024-06-20 17:26:21,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:21,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:21,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:21,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:21,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:26:21,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 587 transitions, 9073 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) [2024-06-20 17:26:21,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:21,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:26:21,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:23,428 INFO L124 PetriNetUnfolderBase]: 4685/7167 cut-off events. [2024-06-20 17:26:23,428 INFO L125 PetriNetUnfolderBase]: For 1319821/1319825 co-relation queries the response was YES. [2024-06-20 17:26:23,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68980 conditions, 7167 events. 4685/7167 cut-off events. For 1319821/1319825 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 41767 event pairs, 940 based on Foata normal form. 6/7172 useless extension candidates. Maximal degree in co-relation 68773. Up to 7022 conditions per place. [2024-06-20 17:26:23,543 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 554 selfloop transitions, 65 changer transitions 0/622 dead transitions. [2024-06-20 17:26:23,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 622 transitions, 10805 flow [2024-06-20 17:26:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:26:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:26:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 162 transitions. [2024-06-20 17:26:23,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36818181818181817 [2024-06-20 17:26:23,544 INFO L175 Difference]: Start difference. First operand has 461 places, 587 transitions, 9073 flow. Second operand 11 states and 162 transitions. [2024-06-20 17:26:23,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 622 transitions, 10805 flow [2024-06-20 17:26:27,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 622 transitions, 10532 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 17:26:27,533 INFO L231 Difference]: Finished difference. Result has 467 places, 593 transitions, 9098 flow [2024-06-20 17:26:27,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8800, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9098, PETRI_PLACES=467, PETRI_TRANSITIONS=593} [2024-06-20 17:26:27,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-20 17:26:27,533 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 593 transitions, 9098 flow [2024-06-20 17:26:27,533 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) [2024-06-20 17:26:27,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:27,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:27,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:26:27,534 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)] === [2024-06-20 17:26:27,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash -58151244, now seen corresponding path program 5 times [2024-06-20 17:26:27,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:27,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087307451] [2024-06-20 17:26:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:27,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:28,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:28,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087307451] [2024-06-20 17:26:28,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087307451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:28,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:28,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:28,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561574078] [2024-06-20 17:26:28,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:28,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:28,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:28,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:28,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:28,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:26:28,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 593 transitions, 9098 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) [2024-06-20 17:26:28,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:28,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:26:28,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:30,490 INFO L124 PetriNetUnfolderBase]: 4768/7284 cut-off events. [2024-06-20 17:26:30,490 INFO L125 PetriNetUnfolderBase]: For 1397221/1397223 co-relation queries the response was YES. [2024-06-20 17:26:30,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70419 conditions, 7284 events. 4768/7284 cut-off events. For 1397221/1397223 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 42431 event pairs, 919 based on Foata normal form. 6/7289 useless extension candidates. Maximal degree in co-relation 70211. Up to 6529 conditions per place. [2024-06-20 17:26:30,609 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 484 selfloop transitions, 154 changer transitions 0/641 dead transitions. [2024-06-20 17:26:30,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 641 transitions, 11448 flow [2024-06-20 17:26:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:26:30,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 17:26:30,610 INFO L175 Difference]: Start difference. First operand has 467 places, 593 transitions, 9098 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:26:30,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 641 transitions, 11448 flow [2024-06-20 17:26:34,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 641 transitions, 11284 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:34,791 INFO L231 Difference]: Finished difference. Result has 470 places, 607 transitions, 9502 flow [2024-06-20 17:26:34,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9502, PETRI_PLACES=470, PETRI_TRANSITIONS=607} [2024-06-20 17:26:34,792 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2024-06-20 17:26:34,792 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 607 transitions, 9502 flow [2024-06-20 17:26:34,792 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) [2024-06-20 17:26:34,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:34,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:34,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:26:34,793 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)] === [2024-06-20 17:26:34,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:34,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1975868332, now seen corresponding path program 6 times [2024-06-20 17:26:34,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:34,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561021688] [2024-06-20 17:26:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:34,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:35,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:35,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561021688] [2024-06-20 17:26:35,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561021688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:35,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:35,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:35,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591594745] [2024-06-20 17:26:35,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:35,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:35,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:35,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:35,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:35,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:26:35,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 607 transitions, 9502 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) [2024-06-20 17:26:35,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:35,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:26:35,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:37,895 INFO L124 PetriNetUnfolderBase]: 4756/7268 cut-off events. [2024-06-20 17:26:37,895 INFO L125 PetriNetUnfolderBase]: For 1392440/1392442 co-relation queries the response was YES. [2024-06-20 17:26:37,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70431 conditions, 7268 events. 4756/7268 cut-off events. For 1392440/1392442 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 42369 event pairs, 900 based on Foata normal form. 6/7273 useless extension candidates. Maximal degree in co-relation 70220. Up to 6521 conditions per place. [2024-06-20 17:26:38,013 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 479 selfloop transitions, 157 changer transitions 0/639 dead transitions. [2024-06-20 17:26:38,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 639 transitions, 11366 flow [2024-06-20 17:26:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:26:38,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-20 17:26:38,015 INFO L175 Difference]: Start difference. First operand has 470 places, 607 transitions, 9502 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:26:38,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 639 transitions, 11366 flow [2024-06-20 17:26:41,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 639 transitions, 11087 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-20 17:26:41,992 INFO L231 Difference]: Finished difference. Result has 476 places, 608 transitions, 9573 flow [2024-06-20 17:26:41,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9223, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9573, PETRI_PLACES=476, PETRI_TRANSITIONS=608} [2024-06-20 17:26:41,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 435 predicate places. [2024-06-20 17:26:41,993 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 608 transitions, 9573 flow [2024-06-20 17:26:41,993 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) [2024-06-20 17:26:41,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:41,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:41,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 17:26:41,993 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)] === [2024-06-20 17:26:41,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1975879678, now seen corresponding path program 8 times [2024-06-20 17:26:41,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:41,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795414654] [2024-06-20 17:26:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:41,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:42,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:42,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795414654] [2024-06-20 17:26:42,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795414654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:42,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:42,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:42,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863581729] [2024-06-20 17:26:42,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:42,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:42,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:42,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:42,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:42,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:26:42,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 608 transitions, 9573 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) [2024-06-20 17:26:42,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:42,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:26:42,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:45,253 INFO L124 PetriNetUnfolderBase]: 4830/7370 cut-off events. [2024-06-20 17:26:45,253 INFO L125 PetriNetUnfolderBase]: For 1457721/1457723 co-relation queries the response was YES. [2024-06-20 17:26:45,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72511 conditions, 7370 events. 4830/7370 cut-off events. For 1457721/1457723 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42969 event pairs, 910 based on Foata normal form. 4/7373 useless extension candidates. Maximal degree in co-relation 72298. Up to 6970 conditions per place. [2024-06-20 17:26:45,387 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 534 selfloop transitions, 115 changer transitions 0/652 dead transitions. [2024-06-20 17:26:45,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 652 transitions, 11778 flow [2024-06-20 17:26:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:26:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:26:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-20 17:26:45,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3840909090909091 [2024-06-20 17:26:45,389 INFO L175 Difference]: Start difference. First operand has 476 places, 608 transitions, 9573 flow. Second operand 11 states and 169 transitions. [2024-06-20 17:26:45,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 652 transitions, 11778 flow [2024-06-20 17:26:49,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 652 transitions, 11492 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:26:49,961 INFO L231 Difference]: Finished difference. Result has 484 places, 621 transitions, 9880 flow [2024-06-20 17:26:49,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9287, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9880, PETRI_PLACES=484, PETRI_TRANSITIONS=621} [2024-06-20 17:26:49,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-20 17:26:49,962 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 621 transitions, 9880 flow [2024-06-20 17:26:49,962 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) [2024-06-20 17:26:49,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:49,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:49,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 17:26:49,962 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)] === [2024-06-20 17:26:49,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash -979066064, now seen corresponding path program 9 times [2024-06-20 17:26:49,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:49,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168129452] [2024-06-20 17:26:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:49,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:50,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:50,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168129452] [2024-06-20 17:26:50,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168129452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:50,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:50,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:50,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105741487] [2024-06-20 17:26:50,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:50,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:50,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:50,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:50,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:50,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:26:50,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 621 transitions, 9880 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) [2024-06-20 17:26:50,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:50,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:26:50,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:53,068 INFO L124 PetriNetUnfolderBase]: 4822/7360 cut-off events. [2024-06-20 17:26:53,069 INFO L125 PetriNetUnfolderBase]: For 1466868/1466870 co-relation queries the response was YES. [2024-06-20 17:26:53,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72076 conditions, 7360 events. 4822/7360 cut-off events. For 1466868/1466870 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42925 event pairs, 908 based on Foata normal form. 6/7365 useless extension candidates. Maximal degree in co-relation 71860. Up to 6967 conditions per place. [2024-06-20 17:26:53,199 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 531 selfloop transitions, 113 changer transitions 0/647 dead transitions. [2024-06-20 17:26:53,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 647 transitions, 11520 flow [2024-06-20 17:26:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 17:26:53,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:26:53,200 INFO L175 Difference]: Start difference. First operand has 484 places, 621 transitions, 9880 flow. Second operand 9 states and 144 transitions. [2024-06-20 17:26:53,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 647 transitions, 11520 flow [2024-06-20 17:26:57,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 647 transitions, 11192 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-20 17:26:57,963 INFO L231 Difference]: Finished difference. Result has 485 places, 621 transitions, 9786 flow [2024-06-20 17:26:57,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9552, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9786, PETRI_PLACES=485, PETRI_TRANSITIONS=621} [2024-06-20 17:26:57,964 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 444 predicate places. [2024-06-20 17:26:57,965 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 621 transitions, 9786 flow [2024-06-20 17:26:57,965 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) [2024-06-20 17:26:57,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:57,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:57,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 17:26:57,965 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)] === [2024-06-20 17:26:57,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:57,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1975873726, now seen corresponding path program 3 times [2024-06-20 17:26:57,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:57,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36516821] [2024-06-20 17:26:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:57,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:58,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:58,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36516821] [2024-06-20 17:26:58,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36516821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:58,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:58,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:58,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956047547] [2024-06-20 17:26:58,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:58,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:58,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:58,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:59,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:26:59,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 621 transitions, 9786 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) [2024-06-20 17:26:59,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:59,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:26:59,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:01,178 INFO L124 PetriNetUnfolderBase]: 4816/7350 cut-off events. [2024-06-20 17:27:01,178 INFO L125 PetriNetUnfolderBase]: For 1460885/1460889 co-relation queries the response was YES. [2024-06-20 17:27:01,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71661 conditions, 7350 events. 4816/7350 cut-off events. For 1460885/1460889 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42869 event pairs, 941 based on Foata normal form. 6/7355 useless extension candidates. Maximal degree in co-relation 71446. Up to 7208 conditions per place. [2024-06-20 17:27:01,304 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 580 selfloop transitions, 64 changer transitions 0/647 dead transitions. [2024-06-20 17:27:01,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 647 transitions, 11176 flow [2024-06-20 17:27:01,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 17:27:01,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-20 17:27:01,305 INFO L175 Difference]: Start difference. First operand has 485 places, 621 transitions, 9786 flow. Second operand 9 states and 141 transitions. [2024-06-20 17:27:01,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 647 transitions, 11176 flow [2024-06-20 17:27:06,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 647 transitions, 10908 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 17:27:06,412 INFO L231 Difference]: Finished difference. Result has 486 places, 621 transitions, 9652 flow [2024-06-20 17:27:06,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9518, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9652, PETRI_PLACES=486, PETRI_TRANSITIONS=621} [2024-06-20 17:27:06,413 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 445 predicate places. [2024-06-20 17:27:06,413 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 621 transitions, 9652 flow [2024-06-20 17:27:06,413 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) [2024-06-20 17:27:06,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:06,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:06,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 17:27:06,413 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)] === [2024-06-20 17:27:06,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:06,414 INFO L85 PathProgramCache]: Analyzing trace with hash 859321425, now seen corresponding path program 2 times [2024-06-20 17:27:06,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:06,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056932317] [2024-06-20 17:27:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:06,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:07,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:07,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056932317] [2024-06-20 17:27:07,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056932317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:07,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:07,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:07,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036543376] [2024-06-20 17:27:07,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:07,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:07,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:07,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:27:07,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 621 transitions, 9652 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) [2024-06-20 17:27:07,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:07,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:27:07,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:09,698 INFO L124 PetriNetUnfolderBase]: 4809/7340 cut-off events. [2024-06-20 17:27:09,699 INFO L125 PetriNetUnfolderBase]: For 1466724/1466728 co-relation queries the response was YES. [2024-06-20 17:27:09,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71411 conditions, 7340 events. 4809/7340 cut-off events. For 1466724/1466728 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42820 event pairs, 946 based on Foata normal form. 5/7344 useless extension candidates. Maximal degree in co-relation 71195. Up to 7259 conditions per place. [2024-06-20 17:27:09,834 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 602 selfloop transitions, 38 changer transitions 0/643 dead transitions. [2024-06-20 17:27:09,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 643 transitions, 11002 flow [2024-06-20 17:27:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-20 17:27:09,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 17:27:09,835 INFO L175 Difference]: Start difference. First operand has 486 places, 621 transitions, 9652 flow. Second operand 9 states and 132 transitions. [2024-06-20 17:27:09,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 643 transitions, 11002 flow [2024-06-20 17:27:14,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 643 transitions, 10874 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:27:14,913 INFO L231 Difference]: Finished difference. Result has 487 places, 621 transitions, 9606 flow [2024-06-20 17:27:14,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9524, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9606, PETRI_PLACES=487, PETRI_TRANSITIONS=621} [2024-06-20 17:27:14,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-20 17:27:14,913 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 621 transitions, 9606 flow [2024-06-20 17:27:14,913 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) [2024-06-20 17:27:14,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:14,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:14,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 17:27:14,914 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)] === [2024-06-20 17:27:14,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:14,914 INFO L85 PathProgramCache]: Analyzing trace with hash -772406672, now seen corresponding path program 4 times [2024-06-20 17:27:14,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:14,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673920901] [2024-06-20 17:27:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:14,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:15,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:15,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673920901] [2024-06-20 17:27:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673920901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:15,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:15,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:15,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015215271] [2024-06-20 17:27:15,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:15,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:15,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:15,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:27:15,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 621 transitions, 9606 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) [2024-06-20 17:27:15,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:15,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:27:15,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:17,886 INFO L124 PetriNetUnfolderBase]: 4819/7354 cut-off events. [2024-06-20 17:27:17,886 INFO L125 PetriNetUnfolderBase]: For 1498015/1498019 co-relation queries the response was YES. [2024-06-20 17:27:17,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71706 conditions, 7354 events. 4819/7354 cut-off events. For 1498015/1498019 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 42893 event pairs, 942 based on Foata normal form. 6/7359 useless extension candidates. Maximal degree in co-relation 71489. Up to 7276 conditions per place. [2024-06-20 17:27:18,023 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 605 selfloop transitions, 37 changer transitions 0/645 dead transitions. [2024-06-20 17:27:18,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 645 transitions, 11050 flow [2024-06-20 17:27:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-20 17:27:18,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 17:27:18,024 INFO L175 Difference]: Start difference. First operand has 487 places, 621 transitions, 9606 flow. Second operand 9 states and 132 transitions. [2024-06-20 17:27:18,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 645 transitions, 11050 flow [2024-06-20 17:27:23,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 645 transitions, 10952 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 17:27:23,236 INFO L231 Difference]: Finished difference. Result has 490 places, 624 transitions, 9678 flow [2024-06-20 17:27:23,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9508, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9678, PETRI_PLACES=490, PETRI_TRANSITIONS=624} [2024-06-20 17:27:23,237 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-20 17:27:23,237 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 624 transitions, 9678 flow [2024-06-20 17:27:23,237 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) [2024-06-20 17:27:23,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:23,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:23,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 17:27:23,238 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)] === [2024-06-20 17:27:23,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:23,238 INFO L85 PathProgramCache]: Analyzing trace with hash -772406858, now seen corresponding path program 7 times [2024-06-20 17:27:23,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:23,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787105958] [2024-06-20 17:27:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:23,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:24,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:24,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787105958] [2024-06-20 17:27:24,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787105958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:24,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:24,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:24,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310985112] [2024-06-20 17:27:24,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:24,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:24,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:24,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:24,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:24,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:27:24,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 624 transitions, 9678 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) [2024-06-20 17:27:24,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:24,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:27:24,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:26,363 INFO L124 PetriNetUnfolderBase]: 4907/7478 cut-off events. [2024-06-20 17:27:26,363 INFO L125 PetriNetUnfolderBase]: For 1600377/1600379 co-relation queries the response was YES. [2024-06-20 17:27:26,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74050 conditions, 7478 events. 4907/7478 cut-off events. For 1600377/1600379 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 43653 event pairs, 964 based on Foata normal form. 6/7483 useless extension candidates. Maximal degree in co-relation 73832. Up to 7071 conditions per place. [2024-06-20 17:27:26,503 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 550 selfloop transitions, 110 changer transitions 0/663 dead transitions. [2024-06-20 17:27:26,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 663 transitions, 11608 flow [2024-06-20 17:27:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 17:27:26,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-20 17:27:26,504 INFO L175 Difference]: Start difference. First operand has 490 places, 624 transitions, 9678 flow. Second operand 9 states and 145 transitions. [2024-06-20 17:27:26,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 663 transitions, 11608 flow [2024-06-20 17:27:31,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 663 transitions, 11452 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-20 17:27:31,824 INFO L231 Difference]: Finished difference. Result has 492 places, 634 transitions, 10034 flow [2024-06-20 17:27:31,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9522, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10034, PETRI_PLACES=492, PETRI_TRANSITIONS=634} [2024-06-20 17:27:31,824 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-20 17:27:31,824 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 634 transitions, 10034 flow [2024-06-20 17:27:31,824 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) [2024-06-20 17:27:31,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:31,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:31,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 17:27:31,825 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)] === [2024-06-20 17:27:31,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:31,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1563007276, now seen corresponding path program 8 times [2024-06-20 17:27:31,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:31,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296506511] [2024-06-20 17:27:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:31,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:32,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:32,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296506511] [2024-06-20 17:27:32,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296506511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:32,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:32,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:32,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354606688] [2024-06-20 17:27:32,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:32,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:32,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:32,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:32,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:32,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:27:32,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 634 transitions, 10034 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) [2024-06-20 17:27:32,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:32,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:27:32,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:34,866 INFO L124 PetriNetUnfolderBase]: 5032/7651 cut-off events. [2024-06-20 17:27:34,866 INFO L125 PetriNetUnfolderBase]: For 1710259/1710261 co-relation queries the response was YES. [2024-06-20 17:27:34,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77370 conditions, 7651 events. 5032/7651 cut-off events. For 1710259/1710261 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 44621 event pairs, 959 based on Foata normal form. 6/7656 useless extension candidates. Maximal degree in co-relation 77150. Up to 7109 conditions per place. [2024-06-20 17:27:35,013 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 557 selfloop transitions, 127 changer transitions 0/687 dead transitions. [2024-06-20 17:27:35,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 687 transitions, 12462 flow [2024-06-20 17:27:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 17:27:35,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-20 17:27:35,014 INFO L175 Difference]: Start difference. First operand has 492 places, 634 transitions, 10034 flow. Second operand 9 states and 149 transitions. [2024-06-20 17:27:35,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 687 transitions, 12462 flow [2024-06-20 17:27:40,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 687 transitions, 12232 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 17:27:40,969 INFO L231 Difference]: Finished difference. Result has 498 places, 653 transitions, 10567 flow [2024-06-20 17:27:40,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9804, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10567, PETRI_PLACES=498, PETRI_TRANSITIONS=653} [2024-06-20 17:27:40,970 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-20 17:27:40,970 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 653 transitions, 10567 flow [2024-06-20 17:27:40,971 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) [2024-06-20 17:27:40,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:40,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:40,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 17:27:40,971 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:40,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:40,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1831989148, now seen corresponding path program 10 times [2024-06-20 17:27:40,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:40,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028965937] [2024-06-20 17:27:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:40,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:41,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:41,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028965937] [2024-06-20 17:27:41,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028965937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:41,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:41,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:41,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869131573] [2024-06-20 17:27:41,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:41,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:41,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:41,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:41,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:41,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:27:41,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 653 transitions, 10567 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) [2024-06-20 17:27:41,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:41,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:27:41,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:44,080 INFO L124 PetriNetUnfolderBase]: 5122/7775 cut-off events. [2024-06-20 17:27:44,080 INFO L125 PetriNetUnfolderBase]: For 1799515/1799517 co-relation queries the response was YES. [2024-06-20 17:27:44,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80383 conditions, 7775 events. 5122/7775 cut-off events. For 1799515/1799517 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 45356 event pairs, 999 based on Foata normal form. 4/7778 useless extension candidates. Maximal degree in co-relation 80160. Up to 7486 conditions per place. [2024-06-20 17:27:44,241 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 605 selfloop transitions, 87 changer transitions 0/695 dead transitions. [2024-06-20 17:27:44,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 695 transitions, 13011 flow [2024-06-20 17:27:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:44,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 17:27:44,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-20 17:27:44,242 INFO L175 Difference]: Start difference. First operand has 498 places, 653 transitions, 10567 flow. Second operand 9 states and 142 transitions. [2024-06-20 17:27:44,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 695 transitions, 13011 flow [2024-06-20 17:27:50,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 695 transitions, 12847 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 17:27:50,609 INFO L231 Difference]: Finished difference. Result has 505 places, 670 transitions, 11075 flow [2024-06-20 17:27:50,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10403, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11075, PETRI_PLACES=505, PETRI_TRANSITIONS=670} [2024-06-20 17:27:50,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-20 17:27:50,610 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 670 transitions, 11075 flow [2024-06-20 17:27:50,611 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) [2024-06-20 17:27:50,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:50,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:50,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 17:27:50,611 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:50,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1831983568, now seen corresponding path program 11 times [2024-06-20 17:27:50,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:50,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371056537] [2024-06-20 17:27:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:50,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:51,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:51,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371056537] [2024-06-20 17:27:51,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371056537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:51,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:51,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:51,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50987282] [2024-06-20 17:27:51,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:51,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:51,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:27:51,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 670 transitions, 11075 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) [2024-06-20 17:27:51,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:51,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:27:51,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:53,803 INFO L124 PetriNetUnfolderBase]: 5114/7765 cut-off events. [2024-06-20 17:27:53,803 INFO L125 PetriNetUnfolderBase]: For 1809724/1809726 co-relation queries the response was YES. [2024-06-20 17:27:53,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80269 conditions, 7765 events. 5114/7765 cut-off events. For 1809724/1809726 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 45347 event pairs, 975 based on Foata normal form. 6/7770 useless extension candidates. Maximal degree in co-relation 80042. Up to 7483 conditions per place. [2024-06-20 17:27:53,949 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 602 selfloop transitions, 89 changer transitions 0/694 dead transitions. [2024-06-20 17:27:53,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 694 transitions, 12853 flow [2024-06-20 17:27:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 17:27:53,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 17:27:53,950 INFO L175 Difference]: Start difference. First operand has 505 places, 670 transitions, 11075 flow. Second operand 9 states and 140 transitions. [2024-06-20 17:27:53,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 694 transitions, 12853 flow [2024-06-20 17:27:58,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 694 transitions, 12502 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-20 17:27:58,766 INFO L231 Difference]: Finished difference. Result has 508 places, 670 transitions, 10910 flow [2024-06-20 17:27:58,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10724, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10910, PETRI_PLACES=508, PETRI_TRANSITIONS=670} [2024-06-20 17:27:58,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 467 predicate places. [2024-06-20 17:27:58,767 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 670 transitions, 10910 flow [2024-06-20 17:27:58,767 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) [2024-06-20 17:27:58,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:58,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:58,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 17:27:58,767 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:58,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash -772139545, now seen corresponding path program 1 times [2024-06-20 17:27:58,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:58,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729970750] [2024-06-20 17:27:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:58,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:59,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729970750] [2024-06-20 17:27:59,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729970750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:59,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:59,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:59,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800351348] [2024-06-20 17:27:59,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:59,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:59,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:59,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:27:59,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 670 transitions, 10910 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) [2024-06-20 17:27:59,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:59,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:27:59,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:01,969 INFO L124 PetriNetUnfolderBase]: 5107/7753 cut-off events. [2024-06-20 17:28:01,969 INFO L125 PetriNetUnfolderBase]: For 1802564/1802568 co-relation queries the response was YES. [2024-06-20 17:28:02,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79869 conditions, 7753 events. 5107/7753 cut-off events. For 1802564/1802568 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 45247 event pairs, 994 based on Foata normal form. 5/7757 useless extension candidates. Maximal degree in co-relation 79642. Up to 7666 conditions per place. [2024-06-20 17:28:02,115 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 643 selfloop transitions, 45 changer transitions 0/691 dead transitions. [2024-06-20 17:28:02,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 691 transitions, 12408 flow [2024-06-20 17:28:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 17:28:02,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-20 17:28:02,116 INFO L175 Difference]: Start difference. First operand has 508 places, 670 transitions, 10910 flow. Second operand 8 states and 123 transitions. [2024-06-20 17:28:02,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 691 transitions, 12408 flow [2024-06-20 17:28:08,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 691 transitions, 12282 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:08,748 INFO L231 Difference]: Finished difference. Result has 511 places, 672 transitions, 10944 flow [2024-06-20 17:28:08,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10784, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10944, PETRI_PLACES=511, PETRI_TRANSITIONS=672} [2024-06-20 17:28:08,749 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 470 predicate places. [2024-06-20 17:28:08,749 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 672 transitions, 10944 flow [2024-06-20 17:28:08,749 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) [2024-06-20 17:28:08,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:08,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:08,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 17:28:08,749 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:08,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:08,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2051706382, now seen corresponding path program 12 times [2024-06-20 17:28:08,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:08,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42799476] [2024-06-20 17:28:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:08,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:09,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:09,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42799476] [2024-06-20 17:28:09,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42799476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:09,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:09,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:09,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445324982] [2024-06-20 17:28:09,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:09,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:09,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:09,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:09,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:09,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:09,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 672 transitions, 10944 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) [2024-06-20 17:28:09,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:09,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:09,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:11,935 INFO L124 PetriNetUnfolderBase]: 5101/7747 cut-off events. [2024-06-20 17:28:11,935 INFO L125 PetriNetUnfolderBase]: For 1821370/1821372 co-relation queries the response was YES. [2024-06-20 17:28:12,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79650 conditions, 7747 events. 5101/7747 cut-off events. For 1821370/1821372 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 45227 event pairs, 989 based on Foata normal form. 4/7750 useless extension candidates. Maximal degree in co-relation 79422. Up to 7569 conditions per place. [2024-06-20 17:28:12,085 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 624 selfloop transitions, 66 changer transitions 0/693 dead transitions. [2024-06-20 17:28:12,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 693 transitions, 12424 flow [2024-06-20 17:28:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-20 17:28:12,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-20 17:28:12,086 INFO L175 Difference]: Start difference. First operand has 511 places, 672 transitions, 10944 flow. Second operand 9 states and 134 transitions. [2024-06-20 17:28:12,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 693 transitions, 12424 flow [2024-06-20 17:28:18,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 693 transitions, 12294 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:18,610 INFO L231 Difference]: Finished difference. Result has 515 places, 674 transitions, 11007 flow [2024-06-20 17:28:18,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10814, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11007, PETRI_PLACES=515, PETRI_TRANSITIONS=674} [2024-06-20 17:28:18,611 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 474 predicate places. [2024-06-20 17:28:18,611 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 674 transitions, 11007 flow [2024-06-20 17:28:18,611 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) [2024-06-20 17:28:18,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:18,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:18,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 17:28:18,612 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:18,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2062668478, now seen corresponding path program 9 times [2024-06-20 17:28:18,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:18,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988769608] [2024-06-20 17:28:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:18,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:19,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988769608] [2024-06-20 17:28:19,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988769608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:19,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:19,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596616636] [2024-06-20 17:28:19,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:19,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:19,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:19,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:19,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:19,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 674 transitions, 11007 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) [2024-06-20 17:28:19,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:19,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:19,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:21,808 INFO L124 PetriNetUnfolderBase]: 5121/7775 cut-off events. [2024-06-20 17:28:21,808 INFO L125 PetriNetUnfolderBase]: For 1870243/1870245 co-relation queries the response was YES. [2024-06-20 17:28:21,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80223 conditions, 7775 events. 5121/7775 cut-off events. For 1870243/1870245 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 45367 event pairs, 993 based on Foata normal form. 6/7780 useless extension candidates. Maximal degree in co-relation 79993. Up to 7452 conditions per place. [2024-06-20 17:28:21,959 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 600 selfloop transitions, 101 changer transitions 0/704 dead transitions. [2024-06-20 17:28:21,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 704 transitions, 12596 flow [2024-06-20 17:28:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 17:28:21,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-20 17:28:21,960 INFO L175 Difference]: Start difference. First operand has 515 places, 674 transitions, 11007 flow. Second operand 9 states and 142 transitions. [2024-06-20 17:28:21,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 704 transitions, 12596 flow [2024-06-20 17:28:27,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 704 transitions, 12403 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:27,699 INFO L231 Difference]: Finished difference. Result has 520 places, 679 transitions, 11129 flow [2024-06-20 17:28:27,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10814, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11129, PETRI_PLACES=520, PETRI_TRANSITIONS=679} [2024-06-20 17:28:27,700 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 479 predicate places. [2024-06-20 17:28:27,700 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 679 transitions, 11129 flow [2024-06-20 17:28:27,700 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) [2024-06-20 17:28:27,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:27,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:27,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 17:28:27,701 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:27,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash -779758322, now seen corresponding path program 5 times [2024-06-20 17:28:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:27,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858212384] [2024-06-20 17:28:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:27,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:28,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:28,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858212384] [2024-06-20 17:28:28,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858212384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:28,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:28,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:28,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082921268] [2024-06-20 17:28:28,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:28,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:28,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:28,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 679 transitions, 11129 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) [2024-06-20 17:28:28,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:28,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:28,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:31,536 INFO L124 PetriNetUnfolderBase]: 5147/7809 cut-off events. [2024-06-20 17:28:31,536 INFO L125 PetriNetUnfolderBase]: For 1897899/1897903 co-relation queries the response was YES. [2024-06-20 17:28:31,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81256 conditions, 7809 events. 5147/7809 cut-off events. For 1897899/1897903 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45597 event pairs, 995 based on Foata normal form. 6/7814 useless extension candidates. Maximal degree in co-relation 81024. Up to 7700 conditions per place. [2024-06-20 17:28:31,678 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 657 selfloop transitions, 48 changer transitions 0/708 dead transitions. [2024-06-20 17:28:31,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 708 transitions, 13065 flow [2024-06-20 17:28:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 17:28:31,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 17:28:31,679 INFO L175 Difference]: Start difference. First operand has 520 places, 679 transitions, 11129 flow. Second operand 9 states and 138 transitions. [2024-06-20 17:28:31,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 708 transitions, 13065 flow [2024-06-20 17:28:38,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 708 transitions, 12861 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:38,429 INFO L231 Difference]: Finished difference. Result has 524 places, 685 transitions, 11213 flow [2024-06-20 17:28:38,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10925, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11213, PETRI_PLACES=524, PETRI_TRANSITIONS=685} [2024-06-20 17:28:38,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 483 predicate places. [2024-06-20 17:28:38,430 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 685 transitions, 11213 flow [2024-06-20 17:28:38,431 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) [2024-06-20 17:28:38,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:38,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:38,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 17:28:38,431 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:38,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:38,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2055436798, now seen corresponding path program 10 times [2024-06-20 17:28:38,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:38,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767850491] [2024-06-20 17:28:38,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:38,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:39,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:39,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767850491] [2024-06-20 17:28:39,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767850491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:39,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:39,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:39,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253593786] [2024-06-20 17:28:39,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:39,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:39,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:39,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 685 transitions, 11213 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) [2024-06-20 17:28:39,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:39,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:39,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:42,288 INFO L124 PetriNetUnfolderBase]: 5135/7795 cut-off events. [2024-06-20 17:28:42,289 INFO L125 PetriNetUnfolderBase]: For 1907747/1907749 co-relation queries the response was YES. [2024-06-20 17:28:42,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80564 conditions, 7795 events. 5135/7795 cut-off events. For 1907747/1907749 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45484 event pairs, 973 based on Foata normal form. 6/7800 useless extension candidates. Maximal degree in co-relation 80331. Up to 7252 conditions per place. [2024-06-20 17:28:42,437 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 580 selfloop transitions, 133 changer transitions 0/716 dead transitions. [2024-06-20 17:28:42,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 716 transitions, 13291 flow [2024-06-20 17:28:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 17:28:42,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-20 17:28:42,438 INFO L175 Difference]: Start difference. First operand has 524 places, 685 transitions, 11213 flow. Second operand 9 states and 149 transitions. [2024-06-20 17:28:42,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 716 transitions, 13291 flow [2024-06-20 17:28:48,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 716 transitions, 13108 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:48,401 INFO L231 Difference]: Finished difference. Result has 528 places, 685 transitions, 11302 flow [2024-06-20 17:28:48,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11030, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11302, PETRI_PLACES=528, PETRI_TRANSITIONS=685} [2024-06-20 17:28:48,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 487 predicate places. [2024-06-20 17:28:48,401 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 685 transitions, 11302 flow [2024-06-20 17:28:48,401 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) [2024-06-20 17:28:48,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:48,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:48,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 17:28:48,402 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:48,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:48,402 INFO L85 PathProgramCache]: Analyzing trace with hash -783488738, now seen corresponding path program 11 times [2024-06-20 17:28:48,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:48,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616654714] [2024-06-20 17:28:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:48,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:49,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:49,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616654714] [2024-06-20 17:28:49,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616654714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:49,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:49,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:49,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551846685] [2024-06-20 17:28:49,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:49,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:49,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:49,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:49,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:49,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:49,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 685 transitions, 11302 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) [2024-06-20 17:28:49,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:49,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:49,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:52,141 INFO L124 PetriNetUnfolderBase]: 5123/7779 cut-off events. [2024-06-20 17:28:52,141 INFO L125 PetriNetUnfolderBase]: For 1900760/1900762 co-relation queries the response was YES. [2024-06-20 17:28:52,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80252 conditions, 7779 events. 5123/7779 cut-off events. For 1900760/1900762 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45440 event pairs, 988 based on Foata normal form. 6/7784 useless extension candidates. Maximal degree in co-relation 80017. Up to 7410 conditions per place. [2024-06-20 17:28:52,286 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 607 selfloop transitions, 103 changer transitions 0/713 dead transitions. [2024-06-20 17:28:52,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 713 transitions, 13100 flow [2024-06-20 17:28:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:28:52,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-20 17:28:52,287 INFO L175 Difference]: Start difference. First operand has 528 places, 685 transitions, 11302 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:28:52,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 713 transitions, 13100 flow [2024-06-20 17:28:57,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 713 transitions, 12820 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:57,769 INFO L231 Difference]: Finished difference. Result has 532 places, 687 transitions, 11268 flow [2024-06-20 17:28:57,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11022, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11268, PETRI_PLACES=532, PETRI_TRANSITIONS=687} [2024-06-20 17:28:57,770 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-20 17:28:57,770 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 687 transitions, 11268 flow [2024-06-20 17:28:57,770 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) [2024-06-20 17:28:57,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:57,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:57,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 17:28:57,770 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:57,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:57,770 INFO L85 PathProgramCache]: Analyzing trace with hash -779763902, now seen corresponding path program 6 times [2024-06-20 17:28:57,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:57,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773745156] [2024-06-20 17:28:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:57,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:58,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:58,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773745156] [2024-06-20 17:28:58,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773745156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:58,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:58,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:58,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827544093] [2024-06-20 17:28:58,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:58,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:58,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:58,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:58,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:58,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 687 transitions, 11268 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) [2024-06-20 17:28:58,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:58,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:58,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:01,557 INFO L124 PetriNetUnfolderBase]: 5117/7769 cut-off events. [2024-06-20 17:29:01,557 INFO L125 PetriNetUnfolderBase]: For 1889890/1889894 co-relation queries the response was YES. [2024-06-20 17:29:01,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79943 conditions, 7769 events. 5117/7769 cut-off events. For 1889890/1889894 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45386 event pairs, 986 based on Foata normal form. 6/7774 useless extension candidates. Maximal degree in co-relation 79706. Up to 7663 conditions per place. [2024-06-20 17:29:01,694 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 657 selfloop transitions, 49 changer transitions 0/709 dead transitions. [2024-06-20 17:29:01,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 709 transitions, 12764 flow [2024-06-20 17:29:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-20 17:29:01,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-20 17:29:01,695 INFO L175 Difference]: Start difference. First operand has 532 places, 687 transitions, 11268 flow. Second operand 9 states and 136 transitions. [2024-06-20 17:29:01,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 709 transitions, 12764 flow [2024-06-20 17:29:08,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 709 transitions, 12531 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 17:29:08,391 INFO L231 Difference]: Finished difference. Result has 537 places, 687 transitions, 11139 flow [2024-06-20 17:29:08,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11035, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11139, PETRI_PLACES=537, PETRI_TRANSITIONS=687} [2024-06-20 17:29:08,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-20 17:29:08,392 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 687 transitions, 11139 flow [2024-06-20 17:29:08,392 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) [2024-06-20 17:29:08,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:08,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:08,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 17:29:08,393 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:08,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2055431249, now seen corresponding path program 3 times [2024-06-20 17:29:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:08,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571403676] [2024-06-20 17:29:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:09,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:09,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571403676] [2024-06-20 17:29:09,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571403676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:09,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:09,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:09,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099495228] [2024-06-20 17:29:09,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:09,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:09,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:09,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:09,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:09,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 687 transitions, 11139 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) [2024-06-20 17:29:09,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:09,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:09,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:12,201 INFO L124 PetriNetUnfolderBase]: 5106/7756 cut-off events. [2024-06-20 17:29:12,201 INFO L125 PetriNetUnfolderBase]: For 1894904/1894906 co-relation queries the response was YES. [2024-06-20 17:29:12,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79230 conditions, 7756 events. 5106/7756 cut-off events. For 1894904/1894906 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45324 event pairs, 977 based on Foata normal form. 5/7760 useless extension candidates. Maximal degree in co-relation 78992. Up to 7491 conditions per place. [2024-06-20 17:29:12,339 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 616 selfloop transitions, 94 changer transitions 0/713 dead transitions. [2024-06-20 17:29:12,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 713 transitions, 13001 flow [2024-06-20 17:29:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-20 17:29:12,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-20 17:29:12,340 INFO L175 Difference]: Start difference. First operand has 537 places, 687 transitions, 11139 flow. Second operand 9 states and 139 transitions. [2024-06-20 17:29:12,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 713 transitions, 13001 flow [2024-06-20 17:29:19,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 713 transitions, 12893 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 17:29:19,110 INFO L231 Difference]: Finished difference. Result has 539 places, 692 transitions, 11373 flow [2024-06-20 17:29:19,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11031, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11373, PETRI_PLACES=539, PETRI_TRANSITIONS=692} [2024-06-20 17:29:19,111 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 498 predicate places. [2024-06-20 17:29:19,112 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 692 transitions, 11373 flow [2024-06-20 17:29:19,112 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) [2024-06-20 17:29:19,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:19,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:19,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 17:29:19,112 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:19,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2051943718, now seen corresponding path program 12 times [2024-06-20 17:29:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:19,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883294747] [2024-06-20 17:29:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:19,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:19,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:19,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883294747] [2024-06-20 17:29:19,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883294747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:19,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:19,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:19,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10269276] [2024-06-20 17:29:19,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:19,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:19,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:19,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:19,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:19,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:19,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 692 transitions, 11373 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) [2024-06-20 17:29:19,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:19,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:19,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:22,787 INFO L124 PetriNetUnfolderBase]: 5094/7740 cut-off events. [2024-06-20 17:29:22,787 INFO L125 PetriNetUnfolderBase]: For 1899655/1899657 co-relation queries the response was YES. [2024-06-20 17:29:22,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78953 conditions, 7740 events. 5094/7740 cut-off events. For 1899655/1899657 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45229 event pairs, 992 based on Foata normal form. 6/7745 useless extension candidates. Maximal degree in co-relation 78713. Up to 7419 conditions per place. [2024-06-20 17:29:22,930 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 616 selfloop transitions, 96 changer transitions 0/715 dead transitions. [2024-06-20 17:29:22,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 715 transitions, 12881 flow [2024-06-20 17:29:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 17:29:22,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-20 17:29:22,932 INFO L175 Difference]: Start difference. First operand has 539 places, 692 transitions, 11373 flow. Second operand 9 states and 142 transitions. [2024-06-20 17:29:22,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 715 transitions, 12881 flow [2024-06-20 17:29:29,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 715 transitions, 12611 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:29,082 INFO L231 Difference]: Finished difference. Result has 542 places, 692 transitions, 11301 flow [2024-06-20 17:29:29,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11103, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11301, PETRI_PLACES=542, PETRI_TRANSITIONS=692} [2024-06-20 17:29:29,082 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 501 predicate places. [2024-06-20 17:29:29,082 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 692 transitions, 11301 flow [2024-06-20 17:29:29,082 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) [2024-06-20 17:29:29,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:29,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:29,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 17:29:29,083 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:29,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:29,083 INFO L85 PathProgramCache]: Analyzing trace with hash -772529804, now seen corresponding path program 4 times [2024-06-20 17:29:29,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:29,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824255315] [2024-06-20 17:29:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:29,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:30,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:30,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824255315] [2024-06-20 17:29:30,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824255315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:30,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:30,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:29:30,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109584635] [2024-06-20 17:29:30,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:30,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:29:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:29:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:29:30,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:30,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 692 transitions, 11301 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:30,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:30,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:30,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:33,311 INFO L124 PetriNetUnfolderBase]: 5138/7808 cut-off events. [2024-06-20 17:29:33,311 INFO L125 PetriNetUnfolderBase]: For 2000048/2000050 co-relation queries the response was YES. [2024-06-20 17:29:33,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79524 conditions, 7808 events. 5138/7808 cut-off events. For 2000048/2000050 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 45690 event pairs, 996 based on Foata normal form. 14/7821 useless extension candidates. Maximal degree in co-relation 79283. Up to 7447 conditions per place. [2024-06-20 17:29:33,445 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 622 selfloop transitions, 97 changer transitions 0/722 dead transitions. [2024-06-20 17:29:33,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 722 transitions, 12911 flow [2024-06-20 17:29:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 17:29:33,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-20 17:29:33,446 INFO L175 Difference]: Start difference. First operand has 542 places, 692 transitions, 11301 flow. Second operand 9 states and 145 transitions. [2024-06-20 17:29:33,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 722 transitions, 12911 flow [2024-06-20 17:29:39,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 722 transitions, 12679 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 17:29:39,882 INFO L231 Difference]: Finished difference. Result has 542 places, 693 transitions, 11297 flow [2024-06-20 17:29:39,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11069, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11297, PETRI_PLACES=542, PETRI_TRANSITIONS=693} [2024-06-20 17:29:39,882 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 501 predicate places. [2024-06-20 17:29:39,883 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 693 transitions, 11297 flow [2024-06-20 17:29:39,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:39,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:39,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:39,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 17:29:39,883 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:39,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash -783242660, now seen corresponding path program 1 times [2024-06-20 17:29:39,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:39,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200309552] [2024-06-20 17:29:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:39,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:41,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:41,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200309552] [2024-06-20 17:29:41,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200309552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:41,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:41,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:29:41,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813037965] [2024-06-20 17:29:41,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:41,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:29:41,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:29:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:29:41,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:41,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 693 transitions, 11297 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:41,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:41,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:41,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:43,962 INFO L124 PetriNetUnfolderBase]: 5182/7876 cut-off events. [2024-06-20 17:29:43,962 INFO L125 PetriNetUnfolderBase]: For 2029178/2029180 co-relation queries the response was YES. [2024-06-20 17:29:44,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80280 conditions, 7876 events. 5182/7876 cut-off events. For 2029178/2029180 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 46155 event pairs, 993 based on Foata normal form. 14/7889 useless extension candidates. Maximal degree in co-relation 80039. Up to 7517 conditions per place. [2024-06-20 17:29:44,102 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 631 selfloop transitions, 91 changer transitions 0/725 dead transitions. [2024-06-20 17:29:44,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 725 transitions, 12927 flow [2024-06-20 17:29:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:29:44,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 17:29:44,103 INFO L175 Difference]: Start difference. First operand has 542 places, 693 transitions, 11297 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:29:44,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 725 transitions, 12927 flow [2024-06-20 17:29:50,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 725 transitions, 12723 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:50,954 INFO L231 Difference]: Finished difference. Result has 544 places, 694 transitions, 11310 flow [2024-06-20 17:29:50,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11093, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11310, PETRI_PLACES=544, PETRI_TRANSITIONS=694} [2024-06-20 17:29:50,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 503 predicate places. [2024-06-20 17:29:50,955 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 694 transitions, 11310 flow [2024-06-20 17:29:50,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:50,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:50,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:50,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 17:29:50,955 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:50,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2051614312, now seen corresponding path program 5 times [2024-06-20 17:29:50,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:50,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481483624] [2024-06-20 17:29:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:50,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:52,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481483624] [2024-06-20 17:29:52,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481483624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:52,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:52,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 17:29:52,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796253069] [2024-06-20 17:29:52,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:52,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 17:29:52,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 17:29:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-20 17:29:52,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:52,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 694 transitions, 11310 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:52,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:52,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:52,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:55,140 INFO L124 PetriNetUnfolderBase]: 5218/7932 cut-off events. [2024-06-20 17:29:55,140 INFO L125 PetriNetUnfolderBase]: For 2019340/2019342 co-relation queries the response was YES. [2024-06-20 17:29:55,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80795 conditions, 7932 events. 5218/7932 cut-off events. For 2019340/2019342 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46518 event pairs, 981 based on Foata normal form. 10/7941 useless extension candidates. Maximal degree in co-relation 80553. Up to 7471 conditions per place. [2024-06-20 17:29:55,277 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 634 selfloop transitions, 93 changer transitions 0/730 dead transitions. [2024-06-20 17:29:55,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 730 transitions, 12998 flow [2024-06-20 17:29:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 17:29:55,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-20 17:29:55,278 INFO L175 Difference]: Start difference. First operand has 544 places, 694 transitions, 11310 flow. Second operand 9 states and 148 transitions. [2024-06-20 17:29:55,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 730 transitions, 12998 flow [2024-06-20 17:30:01,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 730 transitions, 12803 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:30:01,698 INFO L231 Difference]: Finished difference. Result has 547 places, 697 transitions, 11379 flow [2024-06-20 17:30:01,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11115, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11379, PETRI_PLACES=547, PETRI_TRANSITIONS=697} [2024-06-20 17:30:01,699 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 506 predicate places. [2024-06-20 17:30:01,699 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 697 transitions, 11379 flow [2024-06-20 17:30:01,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:01,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:01,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:01,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 17:30:01,699 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:01,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash -772130090, now seen corresponding path program 2 times [2024-06-20 17:30:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:01,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64294079] [2024-06-20 17:30:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:01,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat