./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:05:29,998 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:05:30,060 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:05:30,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:05:30,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:05:30,087 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:05:30,089 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:05:30,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:05:30,090 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:05:30,093 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:05:30,094 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:05:30,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:05:30,095 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:05:30,096 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:05:30,096 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:05:30,096 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:05:30,096 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:05:30,097 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:05:30,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:05:30,097 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:05:30,097 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:05:30,097 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:05:30,098 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:05:30,098 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:05:30,098 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:05:30,098 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:05:30,099 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:05:30,099 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:05:30,099 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:05:30,100 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:05:30,100 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:05:30,101 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:05:30,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:05:30,101 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:05:30,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:05:30,101 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:05:30,102 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:05:30,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:05:30,102 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:05:30,102 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:05:30,102 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:05:30,103 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:05:30,103 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:05:30,103 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:05:30,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:05:30,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:05:30,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:05:30,324 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:05:30,325 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:05:30,326 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-03 20:05:31,318 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:05:31,569 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:05:31,569 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-03 20:05:31,586 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e5635fa/e23d19485c64483882485ad836e2300e/FLAGa5e66030b [2024-06-03 20:05:31,600 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e5635fa/e23d19485c64483882485ad836e2300e [2024-06-03 20:05:31,602 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:05:31,603 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:05:31,603 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-03 20:05:31,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:05:31,756 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:05:31,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:05:31,758 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:05:31,761 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:05:31,762 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:05:31" (1/2) ... [2024-06-03 20:05:31,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289fffdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:05:31, skipping insertion in model container [2024-06-03 20:05:31,763 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:05:31" (1/2) ... [2024-06-03 20:05:31,764 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f379817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:05:31, skipping insertion in model container [2024-06-03 20:05:31,764 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:05:31" (2/2) ... [2024-06-03 20:05:31,765 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289fffdc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:31, skipping insertion in model container [2024-06-03 20:05:31,765 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:05:31" (2/2) ... [2024-06-03 20:05:31,765 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:05:31,828 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:05:31,829 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-03 20:05:31,830 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-03 20:05:31,830 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-03 20:05:31,830 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:05:31,830 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-03 20:05:31,869 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:05:32,190 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:05:32,200 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:05:32,317 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:05:32,426 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:05:32,426 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32 WrapperNode [2024-06-03 20:05:32,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:05:32,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:05:32,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:05:32,427 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:05:32,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,457 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,490 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-03 20:05:32,493 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:05:32,494 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:05:32,494 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:05:32,495 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:05:32,503 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,517 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,542 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:05:32,543 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,555 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,556 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,558 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,560 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:05:32,560 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:05:32,560 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:05:32,561 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:05:32,561 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (1/1) ... [2024-06-03 20:05:32,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:05:32,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:05:32,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:05:32,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:05:32,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:05:32,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:05:32,618 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:05:32,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:05:32,618 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:05:32,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:05:32,618 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:05:32,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:05:32,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:05:32,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:05:32,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:05:32,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:05:32,620 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:05:32,711 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:05:32,712 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:05:33,029 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:05:33,030 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:05:33,172 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:05:33,172 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:05:33,172 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:05:33 BoogieIcfgContainer [2024-06-03 20:05:33,172 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:05:33,174 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:05:33,174 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:05:33,176 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:05:33,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:05:31" (1/4) ... [2024-06-03 20:05:33,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fcba19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:05:33, skipping insertion in model container [2024-06-03 20:05:33,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:05:31" (2/4) ... [2024-06-03 20:05:33,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fcba19 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:05:33, skipping insertion in model container [2024-06-03 20:05:33,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:05:32" (3/4) ... [2024-06-03 20:05:33,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fcba19 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:05:33, skipping insertion in model container [2024-06-03 20:05:33,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:05:33" (4/4) ... [2024-06-03 20:05:33,179 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_power.opt_pso.opt_rmo.opt.i [2024-06-03 20:05:33,210 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:05:33,210 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:05:33,210 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:05:33,251 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:05:33,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:05:33,308 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 20:05:33,308 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:05:33,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:05:33,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:05:33,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 20:05:33,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:05:33,330 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;@2f94da59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:05:33,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:05:33,336 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:05:33,336 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:05:33,336 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:05:33,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:33,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:05:33,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:33,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:33,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1456369184, now seen corresponding path program 1 times [2024-06-03 20:05:33,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:33,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807864641] [2024-06-03 20:05:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:34,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:34,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807864641] [2024-06-03 20:05:34,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807864641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:34,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:34,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:05:34,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990847432] [2024-06-03 20:05:34,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:34,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:05:34,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:34,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:05:34,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:05:34,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:05:34,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:34,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:34,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:05:34,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:34,627 INFO L124 PetriNetUnfolderBase]: 1152/1756 cut-off events. [2024-06-03 20:05:34,628 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-03 20:05:34,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3598 conditions, 1756 events. 1152/1756 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8194 event pairs, 693 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-03 20:05:34,640 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 20:05:34,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 177 flow [2024-06-03 20:05:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:05:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:05:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-03 20:05:34,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-03 20:05:34,651 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 71 transitions. [2024-06-03 20:05:34,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 177 flow [2024-06-03 20:05:34,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:05:34,656 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 20:05:34,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 20:05:34,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 20:05:34,660 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 20:05:34,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:34,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:34,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:34,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:05:34,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:34,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:34,662 INFO L85 PathProgramCache]: Analyzing trace with hash 588573823, now seen corresponding path program 1 times [2024-06-03 20:05:34,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:34,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977536061] [2024-06-03 20:05:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:34,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:35,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:35,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977536061] [2024-06-03 20:05:35,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977536061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:35,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:35,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:05:35,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909105445] [2024-06-03 20:05:35,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:35,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:05:35,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:05:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:05:35,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:05:35,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:35,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:35,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:05:35,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:35,531 INFO L124 PetriNetUnfolderBase]: 1644/2457 cut-off events. [2024-06-03 20:05:35,532 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2024-06-03 20:05:35,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 2457 events. 1644/2457 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11113 event pairs, 1035 based on Foata normal form. 3/2458 useless extension candidates. Maximal degree in co-relation 5625. Up to 2429 conditions per place. [2024-06-03 20:05:35,544 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 45 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 20:05:35,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 260 flow [2024-06-03 20:05:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:05:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:05:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-03 20:05:35,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:05:35,548 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 84 transitions. [2024-06-03 20:05:35,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 260 flow [2024-06-03 20:05:35,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:05:35,551 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-03 20:05:35,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-03 20:05:35,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-03 20:05:35,552 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-03 20:05:35,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:35,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:35,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:35,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:05:35,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:35,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1065920051, now seen corresponding path program 1 times [2024-06-03 20:05:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:35,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401195237] [2024-06-03 20:05:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:35,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:36,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:36,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401195237] [2024-06-03 20:05:36,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401195237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:36,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:36,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:05:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36028254] [2024-06-03 20:05:36,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:36,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:05:36,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:05:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:05:36,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:05:36,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:36,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:36,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:05:36,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:36,570 INFO L124 PetriNetUnfolderBase]: 1632/2439 cut-off events. [2024-06-03 20:05:36,571 INFO L125 PetriNetUnfolderBase]: For 1217/1217 co-relation queries the response was YES. [2024-06-03 20:05:36,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6215 conditions, 2439 events. 1632/2439 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11020 event pairs, 743 based on Foata normal form. 6/2443 useless extension candidates. Maximal degree in co-relation 6197. Up to 2381 conditions per place. [2024-06-03 20:05:36,582 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-03 20:05:36,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 346 flow [2024-06-03 20:05:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:05:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:05:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-03 20:05:36,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-03 20:05:36,587 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 103 transitions. [2024-06-03 20:05:36,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 346 flow [2024-06-03 20:05:36,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 344 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 20:05:36,590 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 198 flow [2024-06-03 20:05:36,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-03 20:05:36,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-03 20:05:36,591 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 198 flow [2024-06-03 20:05:36,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:36,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:36,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:36,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:05:36,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:36,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2146976690, now seen corresponding path program 1 times [2024-06-03 20:05:36,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:36,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293518851] [2024-06-03 20:05:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:36,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:37,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:37,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293518851] [2024-06-03 20:05:37,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293518851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:37,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:37,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:05:37,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16276294] [2024-06-03 20:05:37,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:37,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:05:37,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:37,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:05:37,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:05:37,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:05:37,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:37,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:37,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:05:37,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:38,164 INFO L124 PetriNetUnfolderBase]: 1623/2424 cut-off events. [2024-06-03 20:05:38,164 INFO L125 PetriNetUnfolderBase]: For 2223/2223 co-relation queries the response was YES. [2024-06-03 20:05:38,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6782 conditions, 2424 events. 1623/2424 cut-off events. For 2223/2223 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10903 event pairs, 579 based on Foata normal form. 6/2428 useless extension candidates. Maximal degree in co-relation 6761. Up to 2336 conditions per place. [2024-06-03 20:05:38,175 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 57 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-03 20:05:38,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 410 flow [2024-06-03 20:05:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:05:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:05:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-03 20:05:38,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-03 20:05:38,180 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 198 flow. Second operand 6 states and 117 transitions. [2024-06-03 20:05:38,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 410 flow [2024-06-03 20:05:38,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 388 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 20:05:38,183 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 217 flow [2024-06-03 20:05:38,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=217, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-03 20:05:38,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-03 20:05:38,184 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 217 flow [2024-06-03 20:05:38,184 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) [2024-06-03 20:05:38,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:38,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:38,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:05:38,185 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:38,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:38,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1906018500, now seen corresponding path program 1 times [2024-06-03 20:05:38,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:38,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496261128] [2024-06-03 20:05:38,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:38,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:38,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:38,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496261128] [2024-06-03 20:05:38,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496261128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:38,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:38,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:05:38,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047667734] [2024-06-03 20:05:38,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:38,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:05:38,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:38,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:05:38,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:05:38,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:38,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:38,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:38,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:38,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:39,145 INFO L124 PetriNetUnfolderBase]: 1245/1944 cut-off events. [2024-06-03 20:05:39,146 INFO L125 PetriNetUnfolderBase]: For 2900/2936 co-relation queries the response was YES. [2024-06-03 20:05:39,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5724 conditions, 1944 events. 1245/1944 cut-off events. For 2900/2936 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9317 event pairs, 585 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 5702. Up to 1826 conditions per place. [2024-06-03 20:05:39,154 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2024-06-03 20:05:39,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 379 flow [2024-06-03 20:05:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:05:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:05:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-03 20:05:39,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-03 20:05:39,156 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 217 flow. Second operand 5 states and 91 transitions. [2024-06-03 20:05:39,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 379 flow [2024-06-03 20:05:39,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 348 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:05:39,159 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 257 flow [2024-06-03 20:05:39,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-03 20:05:39,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-03 20:05:39,160 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 257 flow [2024-06-03 20:05:39,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:39,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:39,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:39,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:05:39,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:39,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:39,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1081397346, now seen corresponding path program 1 times [2024-06-03 20:05:39,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:39,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264162623] [2024-06-03 20:05:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:39,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:39,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:39,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264162623] [2024-06-03 20:05:39,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264162623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:39,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:39,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:05:39,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201103892] [2024-06-03 20:05:39,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:39,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:05:39,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:39,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:05:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:05:39,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:39,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:39,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:39,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:39,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:40,251 INFO L124 PetriNetUnfolderBase]: 1626/2432 cut-off events. [2024-06-03 20:05:40,251 INFO L125 PetriNetUnfolderBase]: For 4631/4641 co-relation queries the response was YES. [2024-06-03 20:05:40,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7868 conditions, 2432 events. 1626/2432 cut-off events. For 4631/4641 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10910 event pairs, 734 based on Foata normal form. 12/2441 useless extension candidates. Maximal degree in co-relation 7843. Up to 2346 conditions per place. [2024-06-03 20:05:40,265 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-03 20:05:40,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 519 flow [2024-06-03 20:05:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:05:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:05:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 20:05:40,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:05:40,267 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 257 flow. Second operand 6 states and 102 transitions. [2024-06-03 20:05:40,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 519 flow [2024-06-03 20:05:40,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 502 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:05:40,272 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 348 flow [2024-06-03 20:05:40,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-06-03 20:05:40,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-03 20:05:40,274 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 348 flow [2024-06-03 20:05:40,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:40,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:40,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:40,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:05:40,275 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:40,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:40,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2129436313, now seen corresponding path program 1 times [2024-06-03 20:05:40,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:40,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698379121] [2024-06-03 20:05:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:40,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:40,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698379121] [2024-06-03 20:05:40,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698379121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:40,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:40,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:05:40,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854795816] [2024-06-03 20:05:40,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:40,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:05:40,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:40,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:05:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:05:40,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:40,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 348 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:40,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:40,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:40,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:41,309 INFO L124 PetriNetUnfolderBase]: 1649/2466 cut-off events. [2024-06-03 20:05:41,309 INFO L125 PetriNetUnfolderBase]: For 6739/6739 co-relation queries the response was YES. [2024-06-03 20:05:41,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8893 conditions, 2466 events. 1649/2466 cut-off events. For 6739/6739 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11011 event pairs, 758 based on Foata normal form. 2/2466 useless extension candidates. Maximal degree in co-relation 8865. Up to 2422 conditions per place. [2024-06-03 20:05:41,322 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 70 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2024-06-03 20:05:41,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 630 flow [2024-06-03 20:05:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 20:05:41,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-03 20:05:41,324 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 348 flow. Second operand 7 states and 114 transitions. [2024-06-03 20:05:41,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 630 flow [2024-06-03 20:05:41,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 601 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-03 20:05:41,331 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 429 flow [2024-06-03 20:05:41,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-03 20:05:41,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-03 20:05:41,333 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 429 flow [2024-06-03 20:05:41,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:41,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:41,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:41,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:05:41,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:41,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash 830700505, now seen corresponding path program 2 times [2024-06-03 20:05:41,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:41,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425658888] [2024-06-03 20:05:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:41,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:42,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:42,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425658888] [2024-06-03 20:05:42,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425658888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:42,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:42,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:05:42,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576529103] [2024-06-03 20:05:42,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:42,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:05:42,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:42,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:05:42,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:05:42,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:42,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:42,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:42,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:42,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:42,474 INFO L124 PetriNetUnfolderBase]: 1660/2482 cut-off events. [2024-06-03 20:05:42,475 INFO L125 PetriNetUnfolderBase]: For 8271/8271 co-relation queries the response was YES. [2024-06-03 20:05:42,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9215 conditions, 2482 events. 1660/2482 cut-off events. For 8271/8271 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11094 event pairs, 754 based on Foata normal form. 2/2482 useless extension candidates. Maximal degree in co-relation 9184. Up to 2429 conditions per place. [2024-06-03 20:05:42,485 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 68 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2024-06-03 20:05:42,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 681 flow [2024-06-03 20:05:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:05:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:05:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-03 20:05:42,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:05:42,487 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 429 flow. Second operand 6 states and 99 transitions. [2024-06-03 20:05:42,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 681 flow [2024-06-03 20:05:42,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 640 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:05:42,493 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 470 flow [2024-06-03 20:05:42,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2024-06-03 20:05:42,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-03 20:05:42,495 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 470 flow [2024-06-03 20:05:42,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:42,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:42,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:42,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:05:42,495 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:42,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash -807277655, now seen corresponding path program 3 times [2024-06-03 20:05:42,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:42,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952608008] [2024-06-03 20:05:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:42,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:43,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:43,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952608008] [2024-06-03 20:05:43,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952608008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:43,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:05:43,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415326061] [2024-06-03 20:05:43,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:43,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:05:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:05:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:05:43,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:43,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:43,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:43,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:43,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:43,596 INFO L124 PetriNetUnfolderBase]: 1647/2465 cut-off events. [2024-06-03 20:05:43,597 INFO L125 PetriNetUnfolderBase]: For 9962/9972 co-relation queries the response was YES. [2024-06-03 20:05:43,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9378 conditions, 2465 events. 1647/2465 cut-off events. For 9962/9972 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11068 event pairs, 759 based on Foata normal form. 12/2473 useless extension candidates. Maximal degree in co-relation 9347. Up to 2355 conditions per place. [2024-06-03 20:05:43,611 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 61 selfloop transitions, 24 changer transitions 0/88 dead transitions. [2024-06-03 20:05:43,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 703 flow [2024-06-03 20:05:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:05:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:05:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-03 20:05:43,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:05:43,613 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 470 flow. Second operand 6 states and 100 transitions. [2024-06-03 20:05:43,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 703 flow [2024-06-03 20:05:43,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 647 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:05:43,623 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 505 flow [2024-06-03 20:05:43,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=505, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-03 20:05:43,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-03 20:05:43,624 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 505 flow [2024-06-03 20:05:43,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:43,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:43,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:43,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:05:43,625 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:43,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:43,625 INFO L85 PathProgramCache]: Analyzing trace with hash 836422361, now seen corresponding path program 1 times [2024-06-03 20:05:43,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:43,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570898592] [2024-06-03 20:05:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:43,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:44,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:44,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570898592] [2024-06-03 20:05:44,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570898592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:44,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:44,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:05:44,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571407161] [2024-06-03 20:05:44,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:44,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:05:44,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:44,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:05:44,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:05:44,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:44,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 505 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:44,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:44,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:44,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:44,927 INFO L124 PetriNetUnfolderBase]: 1713/2565 cut-off events. [2024-06-03 20:05:44,927 INFO L125 PetriNetUnfolderBase]: For 10181/10185 co-relation queries the response was YES. [2024-06-03 20:05:44,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9744 conditions, 2565 events. 1713/2565 cut-off events. For 10181/10185 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11545 event pairs, 506 based on Foata normal form. 12/2572 useless extension candidates. Maximal degree in co-relation 9711. Up to 2263 conditions per place. [2024-06-03 20:05:44,940 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 74 selfloop transitions, 35 changer transitions 0/112 dead transitions. [2024-06-03 20:05:44,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 927 flow [2024-06-03 20:05:44,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 20:05:44,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-03 20:05:44,942 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 505 flow. Second operand 7 states and 127 transitions. [2024-06-03 20:05:44,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 927 flow [2024-06-03 20:05:44,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 112 transitions, 891 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:05:44,951 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 648 flow [2024-06-03 20:05:44,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=648, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-06-03 20:05:44,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-03 20:05:44,952 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 648 flow [2024-06-03 20:05:44,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:44,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:44,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:44,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:05:44,952 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:44,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:44,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2009442793, now seen corresponding path program 1 times [2024-06-03 20:05:44,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:44,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913035534] [2024-06-03 20:05:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:44,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:45,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:45,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913035534] [2024-06-03 20:05:45,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913035534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:45,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:45,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:05:45,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106707690] [2024-06-03 20:05:45,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:45,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:05:45,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:45,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:05:45,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:05:45,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:45,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 648 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:45,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:45,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:45,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:46,060 INFO L124 PetriNetUnfolderBase]: 1747/2612 cut-off events. [2024-06-03 20:05:46,060 INFO L125 PetriNetUnfolderBase]: For 13418/13418 co-relation queries the response was YES. [2024-06-03 20:05:46,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11144 conditions, 2612 events. 1747/2612 cut-off events. For 13418/13418 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11775 event pairs, 503 based on Foata normal form. 4/2614 useless extension candidates. Maximal degree in co-relation 11109. Up to 2510 conditions per place. [2024-06-03 20:05:46,074 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 97 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-03 20:05:46,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 1045 flow [2024-06-03 20:05:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:46,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:05:46,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:05:46,075 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 648 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:05:46,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 1045 flow [2024-06-03 20:05:46,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 125 transitions, 1011 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-03 20:05:46,089 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 763 flow [2024-06-03 20:05:46,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=763, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2024-06-03 20:05:46,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-03 20:05:46,089 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 763 flow [2024-06-03 20:05:46,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:46,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:46,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:46,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:05:46,090 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:46,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash 739436373, now seen corresponding path program 2 times [2024-06-03 20:05:46,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:46,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585205914] [2024-06-03 20:05:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:46,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:46,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:46,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585205914] [2024-06-03 20:05:46,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585205914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:46,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:46,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:05:46,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887849383] [2024-06-03 20:05:46,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:46,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:05:46,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:46,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:05:46,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:05:46,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:46,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 763 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:46,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:46,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:46,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:47,339 INFO L124 PetriNetUnfolderBase]: 1769/2644 cut-off events. [2024-06-03 20:05:47,340 INFO L125 PetriNetUnfolderBase]: For 16332/16332 co-relation queries the response was YES. [2024-06-03 20:05:47,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12025 conditions, 2644 events. 1769/2644 cut-off events. For 16332/16332 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11901 event pairs, 500 based on Foata normal form. 4/2646 useless extension candidates. Maximal degree in co-relation 11986. Up to 2524 conditions per place. [2024-06-03 20:05:47,353 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 26 changer transitions 0/124 dead transitions. [2024-06-03 20:05:47,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 1130 flow [2024-06-03 20:05:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 20:05:47,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-03 20:05:47,355 INFO L175 Difference]: Start difference. First operand has 83 places, 96 transitions, 763 flow. Second operand 7 states and 118 transitions. [2024-06-03 20:05:47,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 1130 flow [2024-06-03 20:05:47,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 1092 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:05:47,369 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 828 flow [2024-06-03 20:05:47,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=828, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-03 20:05:47,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-03 20:05:47,370 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 828 flow [2024-06-03 20:05:47,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:47,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:47,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:47,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:05:47,370 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:47,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash 739556343, now seen corresponding path program 3 times [2024-06-03 20:05:47,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:47,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252947993] [2024-06-03 20:05:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:47,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:48,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:48,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252947993] [2024-06-03 20:05:48,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252947993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:48,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:48,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:05:48,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252229596] [2024-06-03 20:05:48,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:48,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:05:48,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:48,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:05:48,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:05:48,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:48,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 828 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:48,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:48,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:48,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:48,535 INFO L124 PetriNetUnfolderBase]: 1807/2699 cut-off events. [2024-06-03 20:05:48,535 INFO L125 PetriNetUnfolderBase]: For 19456/19456 co-relation queries the response was YES. [2024-06-03 20:05:48,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12719 conditions, 2699 events. 1807/2699 cut-off events. For 19456/19456 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12149 event pairs, 499 based on Foata normal form. 4/2701 useless extension candidates. Maximal degree in co-relation 12679. Up to 2527 conditions per place. [2024-06-03 20:05:48,551 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-03 20:05:48,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 131 transitions, 1302 flow [2024-06-03 20:05:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:05:48,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-03 20:05:48,553 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 828 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:05:48,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 131 transitions, 1302 flow [2024-06-03 20:05:48,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 131 transitions, 1220 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:05:48,575 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 911 flow [2024-06-03 20:05:48,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-03 20:05:48,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-03 20:05:48,576 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 911 flow [2024-06-03 20:05:48,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:48,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:48,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:48,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:05:48,577 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:48,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash 159044901, now seen corresponding path program 4 times [2024-06-03 20:05:48,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:48,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490557613] [2024-06-03 20:05:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:48,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:49,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:49,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490557613] [2024-06-03 20:05:49,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490557613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:49,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:49,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:05:49,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174388934] [2024-06-03 20:05:49,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:49,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:05:49,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:05:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:05:49,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:49,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 911 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:49,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:49,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:49,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:49,788 INFO L124 PetriNetUnfolderBase]: 1847/2764 cut-off events. [2024-06-03 20:05:49,788 INFO L125 PetriNetUnfolderBase]: For 20161/20174 co-relation queries the response was YES. [2024-06-03 20:05:49,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12845 conditions, 2764 events. 1847/2764 cut-off events. For 20161/20174 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12593 event pairs, 506 based on Foata normal form. 18/2776 useless extension candidates. Maximal degree in co-relation 12804. Up to 2287 conditions per place. [2024-06-03 20:05:49,806 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 86 selfloop transitions, 52 changer transitions 0/141 dead transitions. [2024-06-03 20:05:49,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 1437 flow [2024-06-03 20:05:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:05:49,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-03 20:05:49,808 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 911 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:05:49,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 1437 flow [2024-06-03 20:05:49,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 141 transitions, 1401 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:05:49,839 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 1079 flow [2024-06-03 20:05:49,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1079, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-03 20:05:49,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-03 20:05:49,840 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 1079 flow [2024-06-03 20:05:49,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:49,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:49,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:49,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:05:49,841 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:49,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:49,841 INFO L85 PathProgramCache]: Analyzing trace with hash 159291165, now seen corresponding path program 1 times [2024-06-03 20:05:49,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:49,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543736666] [2024-06-03 20:05:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:49,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:50,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:50,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543736666] [2024-06-03 20:05:50,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543736666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:50,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:50,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:05:50,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672564439] [2024-06-03 20:05:50,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:50,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:05:50,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:50,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:05:50,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:05:50,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:50,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 1079 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:50,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:50,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:50,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:51,333 INFO L124 PetriNetUnfolderBase]: 1947/2940 cut-off events. [2024-06-03 20:05:51,333 INFO L125 PetriNetUnfolderBase]: For 25122/25135 co-relation queries the response was YES. [2024-06-03 20:05:51,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14460 conditions, 2940 events. 1947/2940 cut-off events. For 25122/25135 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13703 event pairs, 446 based on Foata normal form. 34/2968 useless extension candidates. Maximal degree in co-relation 14416. Up to 2366 conditions per place. [2024-06-03 20:05:51,351 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 96 selfloop transitions, 54 changer transitions 0/153 dead transitions. [2024-06-03 20:05:51,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 153 transitions, 1639 flow [2024-06-03 20:05:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:05:51,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-03 20:05:51,353 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 1079 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:05:51,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 153 transitions, 1639 flow [2024-06-03 20:05:51,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 1562 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 20:05:51,388 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 1157 flow [2024-06-03 20:05:51,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1157, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2024-06-03 20:05:51,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-03 20:05:51,390 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 1157 flow [2024-06-03 20:05:51,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:51,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:51,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:51,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:05:51,391 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:51,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:51,391 INFO L85 PathProgramCache]: Analyzing trace with hash -821612956, now seen corresponding path program 1 times [2024-06-03 20:05:51,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:51,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954789380] [2024-06-03 20:05:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:51,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:52,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:52,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954789380] [2024-06-03 20:05:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954789380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:52,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:52,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:05:52,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889613425] [2024-06-03 20:05:52,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:52,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:05:52,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:05:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:05:52,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:52,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 1157 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:52,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:52,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:52,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:52,852 INFO L124 PetriNetUnfolderBase]: 1970/2971 cut-off events. [2024-06-03 20:05:52,852 INFO L125 PetriNetUnfolderBase]: For 26814/26814 co-relation queries the response was YES. [2024-06-03 20:05:52,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15263 conditions, 2971 events. 1970/2971 cut-off events. For 26814/26814 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13920 event pairs, 525 based on Foata normal form. 2/2971 useless extension candidates. Maximal degree in co-relation 15218. Up to 2853 conditions per place. [2024-06-03 20:05:52,871 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 120 selfloop transitions, 31 changer transitions 0/154 dead transitions. [2024-06-03 20:05:52,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 154 transitions, 1646 flow [2024-06-03 20:05:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:05:52,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 20:05:52,873 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 1157 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:05:52,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 154 transitions, 1646 flow [2024-06-03 20:05:52,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 154 transitions, 1515 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:52,909 INFO L231 Difference]: Finished difference. Result has 102 places, 126 transitions, 1210 flow [2024-06-03 20:05:52,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1210, PETRI_PLACES=102, PETRI_TRANSITIONS=126} [2024-06-03 20:05:52,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-03 20:05:52,911 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 126 transitions, 1210 flow [2024-06-03 20:05:52,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:52,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:52,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:52,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:05:52,911 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:52,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash -564492936, now seen corresponding path program 2 times [2024-06-03 20:05:52,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:52,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657786184] [2024-06-03 20:05:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:52,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:53,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:53,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657786184] [2024-06-03 20:05:53,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657786184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:53,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:53,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:05:53,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800379333] [2024-06-03 20:05:53,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:53,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:05:53,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:53,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:05:53,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:05:53,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:53,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 1210 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:53,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:53,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:53,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:54,334 INFO L124 PetriNetUnfolderBase]: 1965/2964 cut-off events. [2024-06-03 20:05:54,334 INFO L125 PetriNetUnfolderBase]: For 29237/29237 co-relation queries the response was YES. [2024-06-03 20:05:54,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15197 conditions, 2964 events. 1965/2964 cut-off events. For 29237/29237 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13869 event pairs, 522 based on Foata normal form. 2/2964 useless extension candidates. Maximal degree in co-relation 15150. Up to 2819 conditions per place. [2024-06-03 20:05:54,351 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 114 selfloop transitions, 33 changer transitions 0/150 dead transitions. [2024-06-03 20:05:54,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 150 transitions, 1600 flow [2024-06-03 20:05:54,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 20:05:54,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-03 20:05:54,353 INFO L175 Difference]: Start difference. First operand has 102 places, 126 transitions, 1210 flow. Second operand 7 states and 118 transitions. [2024-06-03 20:05:54,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 150 transitions, 1600 flow [2024-06-03 20:05:54,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 150 transitions, 1530 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:05:54,385 INFO L231 Difference]: Finished difference. Result has 104 places, 126 transitions, 1226 flow [2024-06-03 20:05:54,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=104, PETRI_TRANSITIONS=126} [2024-06-03 20:05:54,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-03 20:05:54,386 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 126 transitions, 1226 flow [2024-06-03 20:05:54,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:54,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:54,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:54,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:05:54,387 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:54,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1447692771, now seen corresponding path program 1 times [2024-06-03 20:05:54,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:54,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189765148] [2024-06-03 20:05:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:54,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:55,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:55,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189765148] [2024-06-03 20:05:55,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189765148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:55,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:55,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:05:55,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680839169] [2024-06-03 20:05:55,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:55,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:05:55,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:55,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:05:55,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:05:55,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:55,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 126 transitions, 1226 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:55,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:55,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:55,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:55,593 INFO L124 PetriNetUnfolderBase]: 1987/2999 cut-off events. [2024-06-03 20:05:55,594 INFO L125 PetriNetUnfolderBase]: For 33100/33117 co-relation queries the response was YES. [2024-06-03 20:05:55,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15627 conditions, 2999 events. 1987/2999 cut-off events. For 33100/33117 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14096 event pairs, 528 based on Foata normal form. 18/3012 useless extension candidates. Maximal degree in co-relation 15579. Up to 2836 conditions per place. [2024-06-03 20:05:55,612 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 118 selfloop transitions, 31 changer transitions 0/152 dead transitions. [2024-06-03 20:05:55,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1647 flow [2024-06-03 20:05:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 20:05:55,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-03 20:05:55,614 INFO L175 Difference]: Start difference. First operand has 104 places, 126 transitions, 1226 flow. Second operand 7 states and 117 transitions. [2024-06-03 20:05:55,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1647 flow [2024-06-03 20:05:55,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 152 transitions, 1561 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:55,645 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1244 flow [2024-06-03 20:05:55,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1244, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-03 20:05:55,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-03 20:05:55,646 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1244 flow [2024-06-03 20:05:55,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:55,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:55,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:55,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:05:55,646 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:55,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:55,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1009631325, now seen corresponding path program 2 times [2024-06-03 20:05:55,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:55,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997097786] [2024-06-03 20:05:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:55,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:56,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:56,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997097786] [2024-06-03 20:05:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997097786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:56,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:05:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445020253] [2024-06-03 20:05:56,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:05:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:05:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:05:56,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:56,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1244 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:56,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:56,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:56,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:56,758 INFO L124 PetriNetUnfolderBase]: 2025/3055 cut-off events. [2024-06-03 20:05:56,759 INFO L125 PetriNetUnfolderBase]: For 30803/30816 co-relation queries the response was YES. [2024-06-03 20:05:56,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 3055 events. 2025/3055 cut-off events. For 30803/30816 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14376 event pairs, 528 based on Foata normal form. 10/3059 useless extension candidates. Maximal degree in co-relation 15693. Up to 2503 conditions per place. [2024-06-03 20:05:56,778 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 92 selfloop transitions, 66 changer transitions 0/161 dead transitions. [2024-06-03 20:05:56,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 161 transitions, 1842 flow [2024-06-03 20:05:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:05:56,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:05:56,780 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1244 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:05:56,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 161 transitions, 1842 flow [2024-06-03 20:05:56,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1775 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:05:56,810 INFO L231 Difference]: Finished difference. Result has 107 places, 135 transitions, 1386 flow [2024-06-03 20:05:56,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1386, PETRI_PLACES=107, PETRI_TRANSITIONS=135} [2024-06-03 20:05:56,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-03 20:05:56,811 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 135 transitions, 1386 flow [2024-06-03 20:05:56,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:56,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:56,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:56,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:05:56,812 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:56,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1009636905, now seen corresponding path program 3 times [2024-06-03 20:05:56,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:56,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493624166] [2024-06-03 20:05:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:56,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:57,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:57,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493624166] [2024-06-03 20:05:57,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493624166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:57,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:57,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:05:57,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592749436] [2024-06-03 20:05:57,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:57,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:05:57,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:05:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:05:57,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:57,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 135 transitions, 1386 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:57,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:57,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:57,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:57,903 INFO L124 PetriNetUnfolderBase]: 1998/3014 cut-off events. [2024-06-03 20:05:57,904 INFO L125 PetriNetUnfolderBase]: For 33577/33590 co-relation queries the response was YES. [2024-06-03 20:05:57,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15921 conditions, 3014 events. 1998/3014 cut-off events. For 33577/33590 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14099 event pairs, 530 based on Foata normal form. 14/3022 useless extension candidates. Maximal degree in co-relation 15871. Up to 2480 conditions per place. [2024-06-03 20:05:57,922 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 88 selfloop transitions, 70 changer transitions 0/161 dead transitions. [2024-06-03 20:05:57,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1926 flow [2024-06-03 20:05:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-03 20:05:57,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-03 20:05:57,924 INFO L175 Difference]: Start difference. First operand has 107 places, 135 transitions, 1386 flow. Second operand 7 states and 128 transitions. [2024-06-03 20:05:57,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1926 flow [2024-06-03 20:05:57,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1818 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 20:05:57,967 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1430 flow [2024-06-03 20:05:57,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1430, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-03 20:05:57,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-03 20:05:57,967 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1430 flow [2024-06-03 20:05:57,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:57,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:57,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:57,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:05:57,968 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:57,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:57,968 INFO L85 PathProgramCache]: Analyzing trace with hash 635641370, now seen corresponding path program 1 times [2024-06-03 20:05:57,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:57,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694348964] [2024-06-03 20:05:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:57,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:58,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:58,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694348964] [2024-06-03 20:05:58,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694348964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:58,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:58,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:05:58,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19139797] [2024-06-03 20:05:58,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:58,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:05:58,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:58,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:05:58,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:05:58,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:58,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1430 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:58,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:58,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:58,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:59,305 INFO L124 PetriNetUnfolderBase]: 1987/2996 cut-off events. [2024-06-03 20:05:59,306 INFO L125 PetriNetUnfolderBase]: For 36470/36483 co-relation queries the response was YES. [2024-06-03 20:05:59,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16065 conditions, 2996 events. 1987/2996 cut-off events. For 36470/36483 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14055 event pairs, 543 based on Foata normal form. 12/3004 useless extension candidates. Maximal degree in co-relation 16014. Up to 2849 conditions per place. [2024-06-03 20:05:59,324 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 128 selfloop transitions, 31 changer transitions 0/162 dead transitions. [2024-06-03 20:05:59,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 162 transitions, 1890 flow [2024-06-03 20:05:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 20:05:59,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-03 20:05:59,326 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1430 flow. Second operand 8 states and 129 transitions. [2024-06-03 20:05:59,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 162 transitions, 1890 flow [2024-06-03 20:05:59,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 162 transitions, 1713 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:59,371 INFO L231 Difference]: Finished difference. Result has 114 places, 139 transitions, 1385 flow [2024-06-03 20:05:59,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1385, PETRI_PLACES=114, PETRI_TRANSITIONS=139} [2024-06-03 20:05:59,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-03 20:05:59,389 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 139 transitions, 1385 flow [2024-06-03 20:05:59,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:05:59,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:59,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:59,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:05:59,390 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:59,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1456217790, now seen corresponding path program 1 times [2024-06-03 20:05:59,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:59,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745792148] [2024-06-03 20:05:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:59,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:00,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:00,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745792148] [2024-06-03 20:06:00,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745792148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:00,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:00,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:00,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174576000] [2024-06-03 20:06:00,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:00,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:00,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:00,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:00,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:00,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:00,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 139 transitions, 1385 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:00,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:00,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:00,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:00,993 INFO L124 PetriNetUnfolderBase]: 2004/3022 cut-off events. [2024-06-03 20:06:00,993 INFO L125 PetriNetUnfolderBase]: For 39310/39310 co-relation queries the response was YES. [2024-06-03 20:06:01,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16232 conditions, 3022 events. 2004/3022 cut-off events. For 39310/39310 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14184 event pairs, 368 based on Foata normal form. 4/3024 useless extension candidates. Maximal degree in co-relation 16179. Up to 2870 conditions per place. [2024-06-03 20:06:01,009 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-03 20:06:01,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1851 flow [2024-06-03 20:06:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 20:06:01,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 20:06:01,010 INFO L175 Difference]: Start difference. First operand has 114 places, 139 transitions, 1385 flow. Second operand 8 states and 131 transitions. [2024-06-03 20:06:01,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1851 flow [2024-06-03 20:06:01,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 170 transitions, 1783 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:01,057 INFO L231 Difference]: Finished difference. Result has 117 places, 141 transitions, 1400 flow [2024-06-03 20:06:01,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=117, PETRI_TRANSITIONS=141} [2024-06-03 20:06:01,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-03 20:06:01,058 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 141 transitions, 1400 flow [2024-06-03 20:06:01,058 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) [2024-06-03 20:06:01,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:01,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:01,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:06:01,058 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:01,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash -319410268, now seen corresponding path program 2 times [2024-06-03 20:06:01,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:01,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752025331] [2024-06-03 20:06:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:01,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:02,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:02,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752025331] [2024-06-03 20:06:02,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752025331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:02,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:02,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:02,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019098684] [2024-06-03 20:06:02,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:02,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:02,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:02,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 141 transitions, 1400 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:02,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:02,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:02,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:02,706 INFO L124 PetriNetUnfolderBase]: 2021/3047 cut-off events. [2024-06-03 20:06:02,706 INFO L125 PetriNetUnfolderBase]: For 43413/43413 co-relation queries the response was YES. [2024-06-03 20:06:02,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16701 conditions, 3047 events. 2021/3047 cut-off events. For 43413/43413 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14330 event pairs, 483 based on Foata normal form. 4/3049 useless extension candidates. Maximal degree in co-relation 16647. Up to 2869 conditions per place. [2024-06-03 20:06:02,725 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 35 changer transitions 0/172 dead transitions. [2024-06-03 20:06:02,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 172 transitions, 1878 flow [2024-06-03 20:06:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 20:06:02,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:06:02,726 INFO L175 Difference]: Start difference. First operand has 117 places, 141 transitions, 1400 flow. Second operand 8 states and 132 transitions. [2024-06-03 20:06:02,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 172 transitions, 1878 flow [2024-06-03 20:06:02,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 172 transitions, 1813 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:02,785 INFO L231 Difference]: Finished difference. Result has 119 places, 143 transitions, 1445 flow [2024-06-03 20:06:02,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1445, PETRI_PLACES=119, PETRI_TRANSITIONS=143} [2024-06-03 20:06:02,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-03 20:06:02,785 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 143 transitions, 1445 flow [2024-06-03 20:06:02,786 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) [2024-06-03 20:06:02,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:02,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:02,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:06:02,786 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:02,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:02,786 INFO L85 PathProgramCache]: Analyzing trace with hash -319410144, now seen corresponding path program 1 times [2024-06-03 20:06:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726441922] [2024-06-03 20:06:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:02,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:03,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:03,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726441922] [2024-06-03 20:06:03,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726441922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:03,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:03,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:03,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473192435] [2024-06-03 20:06:03,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:03,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:03,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:03,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:03,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 143 transitions, 1445 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:03,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:03,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:03,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:04,252 INFO L124 PetriNetUnfolderBase]: 2001/3009 cut-off events. [2024-06-03 20:06:04,253 INFO L125 PetriNetUnfolderBase]: For 47591/47604 co-relation queries the response was YES. [2024-06-03 20:06:04,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16867 conditions, 3009 events. 2001/3009 cut-off events. For 47591/47604 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14030 event pairs, 480 based on Foata normal form. 12/3017 useless extension candidates. Maximal degree in co-relation 16812. Up to 2815 conditions per place. [2024-06-03 20:06:04,274 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 125 selfloop transitions, 38 changer transitions 0/166 dead transitions. [2024-06-03 20:06:04,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 166 transitions, 1867 flow [2024-06-03 20:06:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:06:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:06:04,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 20:06:04,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-03 20:06:04,276 INFO L175 Difference]: Start difference. First operand has 119 places, 143 transitions, 1445 flow. Second operand 7 states and 117 transitions. [2024-06-03 20:06:04,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 166 transitions, 1867 flow [2024-06-03 20:06:04,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 166 transitions, 1775 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:04,331 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1443 flow [2024-06-03 20:06:04,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1443, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-03 20:06:04,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-03 20:06:04,332 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1443 flow [2024-06-03 20:06:04,332 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) [2024-06-03 20:06:04,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:04,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:04,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:06:04,332 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:04,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:04,333 INFO L85 PathProgramCache]: Analyzing trace with hash -333737722, now seen corresponding path program 3 times [2024-06-03 20:06:04,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:04,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392098418] [2024-06-03 20:06:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:04,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:05,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:05,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392098418] [2024-06-03 20:06:05,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392098418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:05,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:05,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:05,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73549463] [2024-06-03 20:06:05,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:05,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:05,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:05,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:05,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:05,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1443 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:05,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:05,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:05,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:05,923 INFO L124 PetriNetUnfolderBase]: 2018/3034 cut-off events. [2024-06-03 20:06:05,923 INFO L125 PetriNetUnfolderBase]: For 52020/52020 co-relation queries the response was YES. [2024-06-03 20:06:05,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17206 conditions, 3034 events. 2018/3034 cut-off events. For 52020/52020 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14159 event pairs, 470 based on Foata normal form. 4/3036 useless extension candidates. Maximal degree in co-relation 17150. Up to 2830 conditions per place. [2024-06-03 20:06:05,944 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 128 selfloop transitions, 42 changer transitions 0/173 dead transitions. [2024-06-03 20:06:05,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 173 transitions, 1927 flow [2024-06-03 20:06:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 20:06:05,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:06:05,945 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1443 flow. Second operand 8 states and 132 transitions. [2024-06-03 20:06:05,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 173 transitions, 1927 flow [2024-06-03 20:06:05,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 173 transitions, 1781 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:06:05,999 INFO L231 Difference]: Finished difference. Result has 121 places, 145 transitions, 1422 flow [2024-06-03 20:06:05,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1422, PETRI_PLACES=121, PETRI_TRANSITIONS=145} [2024-06-03 20:06:06,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-03 20:06:06,000 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 145 transitions, 1422 flow [2024-06-03 20:06:06,000 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) [2024-06-03 20:06:06,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:06,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:06,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:06:06,000 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:06,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash 209305566, now seen corresponding path program 1 times [2024-06-03 20:06:06,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:06,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024981708] [2024-06-03 20:06:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:06,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:06,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:06,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024981708] [2024-06-03 20:06:06,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024981708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:06,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:06,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:06:06,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485523753] [2024-06-03 20:06:06,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:06,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:06:06,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:06,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:06:06,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:06:06,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:06,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 145 transitions, 1422 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:06,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:06,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:06,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:07,190 INFO L124 PetriNetUnfolderBase]: 2023/3042 cut-off events. [2024-06-03 20:06:07,190 INFO L125 PetriNetUnfolderBase]: For 51773/51773 co-relation queries the response was YES. [2024-06-03 20:06:07,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17293 conditions, 3042 events. 2023/3042 cut-off events. For 51773/51773 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14224 event pairs, 489 based on Foata normal form. 1/3041 useless extension candidates. Maximal degree in co-relation 17236. Up to 2990 conditions per place. [2024-06-03 20:06:07,211 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 147 selfloop transitions, 19 changer transitions 0/169 dead transitions. [2024-06-03 20:06:07,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 169 transitions, 1918 flow [2024-06-03 20:06:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:06:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:06:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-03 20:06:07,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:06:07,212 INFO L175 Difference]: Start difference. First operand has 121 places, 145 transitions, 1422 flow. Second operand 6 states and 98 transitions. [2024-06-03 20:06:07,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 169 transitions, 1918 flow [2024-06-03 20:06:07,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1811 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:07,278 INFO L231 Difference]: Finished difference. Result has 122 places, 154 transitions, 1444 flow [2024-06-03 20:06:07,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=122, PETRI_TRANSITIONS=154} [2024-06-03 20:06:07,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-03 20:06:07,279 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 154 transitions, 1444 flow [2024-06-03 20:06:07,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:07,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:07,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:07,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:06:07,279 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:07,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1776623708, now seen corresponding path program 4 times [2024-06-03 20:06:07,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:07,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335904909] [2024-06-03 20:06:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:07,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:08,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:08,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335904909] [2024-06-03 20:06:08,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335904909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:08,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:08,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:08,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143047502] [2024-06-03 20:06:08,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:08,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:08,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:08,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:08,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 154 transitions, 1444 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:08,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:08,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:08,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:08,915 INFO L124 PetriNetUnfolderBase]: 2032/3060 cut-off events. [2024-06-03 20:06:08,915 INFO L125 PetriNetUnfolderBase]: For 56687/56703 co-relation queries the response was YES. [2024-06-03 20:06:08,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17567 conditions, 3060 events. 2032/3060 cut-off events. For 56687/56703 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14254 event pairs, 485 based on Foata normal form. 15/3069 useless extension candidates. Maximal degree in co-relation 17508. Up to 2645 conditions per place. [2024-06-03 20:06:08,935 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 122 selfloop transitions, 58 changer transitions 0/183 dead transitions. [2024-06-03 20:06:08,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 183 transitions, 1952 flow [2024-06-03 20:06:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:06:08,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-03 20:06:08,937 INFO L175 Difference]: Start difference. First operand has 122 places, 154 transitions, 1444 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:06:08,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 183 transitions, 1952 flow [2024-06-03 20:06:09,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 183 transitions, 1930 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-03 20:06:09,003 INFO L231 Difference]: Finished difference. Result has 129 places, 157 transitions, 1592 flow [2024-06-03 20:06:09,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1592, PETRI_PLACES=129, PETRI_TRANSITIONS=157} [2024-06-03 20:06:09,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-03 20:06:09,003 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 157 transitions, 1592 flow [2024-06-03 20:06:09,004 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) [2024-06-03 20:06:09,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:09,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:09,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:06:09,004 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:09,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash 417172692, now seen corresponding path program 1 times [2024-06-03 20:06:09,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:09,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408842111] [2024-06-03 20:06:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:09,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:09,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408842111] [2024-06-03 20:06:09,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408842111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:09,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:09,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:09,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928279435] [2024-06-03 20:06:09,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:09,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:09,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:09,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:09,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:09,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 157 transitions, 1592 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:09,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:09,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:09,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:10,458 INFO L124 PetriNetUnfolderBase]: 2060/3103 cut-off events. [2024-06-03 20:06:10,458 INFO L125 PetriNetUnfolderBase]: For 62225/62241 co-relation queries the response was YES. [2024-06-03 20:06:10,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18544 conditions, 3103 events. 2060/3103 cut-off events. For 62225/62241 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14488 event pairs, 485 based on Foata normal form. 11/3108 useless extension candidates. Maximal degree in co-relation 18482. Up to 2593 conditions per place. [2024-06-03 20:06:10,477 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 119 selfloop transitions, 68 changer transitions 0/190 dead transitions. [2024-06-03 20:06:10,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 190 transitions, 2222 flow [2024-06-03 20:06:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:06:10,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:06:10,479 INFO L175 Difference]: Start difference. First operand has 129 places, 157 transitions, 1592 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:06:10,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 190 transitions, 2222 flow [2024-06-03 20:06:10,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 190 transitions, 2045 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:10,550 INFO L231 Difference]: Finished difference. Result has 131 places, 162 transitions, 1620 flow [2024-06-03 20:06:10,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1620, PETRI_PLACES=131, PETRI_TRANSITIONS=162} [2024-06-03 20:06:10,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-03 20:06:10,551 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 162 transitions, 1620 flow [2024-06-03 20:06:10,551 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) [2024-06-03 20:06:10,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:10,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:10,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:06:10,552 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:10,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:10,552 INFO L85 PathProgramCache]: Analyzing trace with hash 408891724, now seen corresponding path program 1 times [2024-06-03 20:06:10,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:10,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388036011] [2024-06-03 20:06:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:10,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:11,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:11,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388036011] [2024-06-03 20:06:11,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388036011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:11,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:11,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:11,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543351476] [2024-06-03 20:06:11,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:11,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:11,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:11,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:11,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:11,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:11,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 162 transitions, 1620 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:11,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:11,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:11,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:11,993 INFO L124 PetriNetUnfolderBase]: 2050/3089 cut-off events. [2024-06-03 20:06:11,994 INFO L125 PetriNetUnfolderBase]: For 65509/65525 co-relation queries the response was YES. [2024-06-03 20:06:12,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18614 conditions, 3089 events. 2050/3089 cut-off events. For 65509/65525 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14408 event pairs, 490 based on Foata normal form. 11/3094 useless extension candidates. Maximal degree in co-relation 18551. Up to 2562 conditions per place. [2024-06-03 20:06:12,016 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 115 selfloop transitions, 70 changer transitions 0/188 dead transitions. [2024-06-03 20:06:12,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 188 transitions, 2102 flow [2024-06-03 20:06:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:06:12,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-03 20:06:12,018 INFO L175 Difference]: Start difference. First operand has 131 places, 162 transitions, 1620 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:06:12,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 188 transitions, 2102 flow [2024-06-03 20:06:12,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 188 transitions, 1951 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:12,100 INFO L231 Difference]: Finished difference. Result has 135 places, 162 transitions, 1617 flow [2024-06-03 20:06:12,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1617, PETRI_PLACES=135, PETRI_TRANSITIONS=162} [2024-06-03 20:06:12,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-03 20:06:12,101 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 162 transitions, 1617 flow [2024-06-03 20:06:12,101 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) [2024-06-03 20:06:12,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:12,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:12,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:06:12,101 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:12,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:12,102 INFO L85 PathProgramCache]: Analyzing trace with hash 339890280, now seen corresponding path program 2 times [2024-06-03 20:06:12,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:12,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712681200] [2024-06-03 20:06:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:12,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712681200] [2024-06-03 20:06:12,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712681200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:12,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:12,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:12,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261537590] [2024-06-03 20:06:12,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:12,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:12,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:12,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:12,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:12,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 162 transitions, 1617 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:12,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:12,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:12,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:13,487 INFO L124 PetriNetUnfolderBase]: 2067/3115 cut-off events. [2024-06-03 20:06:13,488 INFO L125 PetriNetUnfolderBase]: For 70485/70501 co-relation queries the response was YES. [2024-06-03 20:06:13,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18961 conditions, 3115 events. 2067/3115 cut-off events. For 70485/70501 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14632 event pairs, 445 based on Foata normal form. 16/3127 useless extension candidates. Maximal degree in co-relation 18897. Up to 2863 conditions per place. [2024-06-03 20:06:13,507 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 39 changer transitions 0/194 dead transitions. [2024-06-03 20:06:13,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 194 transitions, 2285 flow [2024-06-03 20:06:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 20:06:13,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 20:06:13,509 INFO L175 Difference]: Start difference. First operand has 135 places, 162 transitions, 1617 flow. Second operand 8 states and 131 transitions. [2024-06-03 20:06:13,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 194 transitions, 2285 flow [2024-06-03 20:06:13,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 194 transitions, 2125 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:06:13,590 INFO L231 Difference]: Finished difference. Result has 137 places, 167 transitions, 1648 flow [2024-06-03 20:06:13,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1648, PETRI_PLACES=137, PETRI_TRANSITIONS=167} [2024-06-03 20:06:13,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-03 20:06:13,591 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 167 transitions, 1648 flow [2024-06-03 20:06:13,591 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) [2024-06-03 20:06:13,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:13,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:13,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:06:13,591 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:13,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:13,592 INFO L85 PathProgramCache]: Analyzing trace with hash 408898482, now seen corresponding path program 3 times [2024-06-03 20:06:13,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:13,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914217913] [2024-06-03 20:06:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:13,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:14,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:14,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914217913] [2024-06-03 20:06:14,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914217913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:14,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:14,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:14,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587855709] [2024-06-03 20:06:14,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:14,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:14,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:14,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:14,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 167 transitions, 1648 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:14,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:14,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:14,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:15,111 INFO L124 PetriNetUnfolderBase]: 2059/3103 cut-off events. [2024-06-03 20:06:15,112 INFO L125 PetriNetUnfolderBase]: For 74984/75000 co-relation queries the response was YES. [2024-06-03 20:06:15,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19037 conditions, 3103 events. 2059/3103 cut-off events. For 74984/75000 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14522 event pairs, 492 based on Foata normal form. 16/3115 useless extension candidates. Maximal degree in co-relation 18971. Up to 2961 conditions per place. [2024-06-03 20:06:15,130 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 29 changer transitions 0/191 dead transitions. [2024-06-03 20:06:15,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 191 transitions, 2120 flow [2024-06-03 20:06:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:06:15,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:06:15,132 INFO L175 Difference]: Start difference. First operand has 137 places, 167 transitions, 1648 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:06:15,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 191 transitions, 2120 flow [2024-06-03 20:06:15,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 191 transitions, 2010 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:15,227 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1603 flow [2024-06-03 20:06:15,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1603, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-03 20:06:15,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-03 20:06:15,228 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1603 flow [2024-06-03 20:06:15,228 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) [2024-06-03 20:06:15,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:15,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:15,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:06:15,229 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:15,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash 209633856, now seen corresponding path program 2 times [2024-06-03 20:06:15,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:15,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828635873] [2024-06-03 20:06:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:15,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:15,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:15,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828635873] [2024-06-03 20:06:15,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828635873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:15,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:15,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:06:15,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894419890] [2024-06-03 20:06:15,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:15,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:06:15,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:06:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:06:15,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:15,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1603 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:15,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:15,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:15,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:16,323 INFO L124 PetriNetUnfolderBase]: 2066/3111 cut-off events. [2024-06-03 20:06:16,323 INFO L125 PetriNetUnfolderBase]: For 78552/78552 co-relation queries the response was YES. [2024-06-03 20:06:16,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19147 conditions, 3111 events. 2066/3111 cut-off events. For 78552/78552 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14624 event pairs, 490 based on Foata normal form. 3/3112 useless extension candidates. Maximal degree in co-relation 19079. Up to 3051 conditions per place. [2024-06-03 20:06:16,346 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-06-03 20:06:16,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 184 transitions, 2057 flow [2024-06-03 20:06:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:06:16,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:06:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-03 20:06:16,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:06:16,348 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1603 flow. Second operand 5 states and 90 transitions. [2024-06-03 20:06:16,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 184 transitions, 2057 flow [2024-06-03 20:06:16,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 184 transitions, 1960 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:06:16,450 INFO L231 Difference]: Finished difference. Result has 139 places, 170 transitions, 1612 flow [2024-06-03 20:06:16,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1612, PETRI_PLACES=139, PETRI_TRANSITIONS=170} [2024-06-03 20:06:16,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-03 20:06:16,452 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 170 transitions, 1612 flow [2024-06-03 20:06:16,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:16,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:16,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:16,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:06:16,453 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)] === [2024-06-03 20:06:16,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1313655978, now seen corresponding path program 1 times [2024-06-03 20:06:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:16,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293753545] [2024-06-03 20:06:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:16,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:17,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:17,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293753545] [2024-06-03 20:06:17,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293753545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:17,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:17,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:17,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127806023] [2024-06-03 20:06:17,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:17,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:17,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:17,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:17,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:17,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:17,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 170 transitions, 1612 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:17,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:17,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:17,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:17,931 INFO L124 PetriNetUnfolderBase]: 2083/3141 cut-off events. [2024-06-03 20:06:17,931 INFO L125 PetriNetUnfolderBase]: For 84386/84405 co-relation queries the response was YES. [2024-06-03 20:06:17,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19636 conditions, 3141 events. 2083/3141 cut-off events. For 84386/84405 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14789 event pairs, 329 based on Foata normal form. 18/3155 useless extension candidates. Maximal degree in co-relation 19567. Up to 2964 conditions per place. [2024-06-03 20:06:17,954 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 26 changer transitions 0/200 dead transitions. [2024-06-03 20:06:17,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 200 transitions, 2146 flow [2024-06-03 20:06:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 20:06:17,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-03 20:06:17,955 INFO L175 Difference]: Start difference. First operand has 139 places, 170 transitions, 1612 flow. Second operand 8 states and 129 transitions. [2024-06-03 20:06:17,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 200 transitions, 2146 flow [2024-06-03 20:06:18,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 200 transitions, 2098 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:06:18,044 INFO L231 Difference]: Finished difference. Result has 144 places, 172 transitions, 1661 flow [2024-06-03 20:06:18,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1661, PETRI_PLACES=144, PETRI_TRANSITIONS=172} [2024-06-03 20:06:18,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-03 20:06:18,045 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 172 transitions, 1661 flow [2024-06-03 20:06:18,045 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) [2024-06-03 20:06:18,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:18,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:18,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:06:18,046 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:18,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:18,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1121680166, now seen corresponding path program 2 times [2024-06-03 20:06:18,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:18,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489890466] [2024-06-03 20:06:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:18,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:18,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:18,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489890466] [2024-06-03 20:06:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489890466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:18,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:18,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:18,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535126339] [2024-06-03 20:06:18,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:18,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:18,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:18,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:19,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:19,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 172 transitions, 1661 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:19,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:19,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:19,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:19,604 INFO L124 PetriNetUnfolderBase]: 2100/3166 cut-off events. [2024-06-03 20:06:19,604 INFO L125 PetriNetUnfolderBase]: For 90465/90484 co-relation queries the response was YES. [2024-06-03 20:06:19,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20173 conditions, 3166 events. 2100/3166 cut-off events. For 90465/90484 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14962 event pairs, 447 based on Foata normal form. 18/3180 useless extension candidates. Maximal degree in co-relation 20103. Up to 2949 conditions per place. [2024-06-03 20:06:19,629 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 40 changer transitions 0/202 dead transitions. [2024-06-03 20:06:19,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 202 transitions, 2211 flow [2024-06-03 20:06:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 20:06:19,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 20:06:19,633 INFO L175 Difference]: Start difference. First operand has 144 places, 172 transitions, 1661 flow. Second operand 8 states and 131 transitions. [2024-06-03 20:06:19,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 202 transitions, 2211 flow [2024-06-03 20:06:19,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 202 transitions, 2132 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:19,751 INFO L231 Difference]: Finished difference. Result has 146 places, 174 transitions, 1712 flow [2024-06-03 20:06:19,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1712, PETRI_PLACES=146, PETRI_TRANSITIONS=174} [2024-06-03 20:06:19,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-03 20:06:19,752 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 174 transitions, 1712 flow [2024-06-03 20:06:19,752 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) [2024-06-03 20:06:19,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:19,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:19,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:06:19,752 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:19,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash -549107424, now seen corresponding path program 3 times [2024-06-03 20:06:19,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:19,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759211027] [2024-06-03 20:06:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:19,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:20,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:20,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759211027] [2024-06-03 20:06:20,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759211027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:20,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:20,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:20,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284540493] [2024-06-03 20:06:20,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:20,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:20,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:20,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:20,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:20,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:20,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 174 transitions, 1712 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:20,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:20,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:20,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:21,298 INFO L124 PetriNetUnfolderBase]: 2117/3193 cut-off events. [2024-06-03 20:06:21,299 INFO L125 PetriNetUnfolderBase]: For 97880/97899 co-relation queries the response was YES. [2024-06-03 20:06:21,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20693 conditions, 3193 events. 2117/3193 cut-off events. For 97880/97899 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15099 event pairs, 447 based on Foata normal form. 18/3207 useless extension candidates. Maximal degree in co-relation 20622. Up to 2920 conditions per place. [2024-06-03 20:06:21,325 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 161 selfloop transitions, 40 changer transitions 0/204 dead transitions. [2024-06-03 20:06:21,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 204 transitions, 2266 flow [2024-06-03 20:06:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 20:06:21,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:06:21,326 INFO L175 Difference]: Start difference. First operand has 146 places, 174 transitions, 1712 flow. Second operand 8 states and 132 transitions. [2024-06-03 20:06:21,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 204 transitions, 2266 flow [2024-06-03 20:06:21,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 204 transitions, 2156 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:21,443 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1735 flow [2024-06-03 20:06:21,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1735, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-03 20:06:21,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-03 20:06:21,444 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1735 flow [2024-06-03 20:06:21,444 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) [2024-06-03 20:06:21,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:21,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:21,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:06:21,445 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:21,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash -272460318, now seen corresponding path program 1 times [2024-06-03 20:06:21,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:21,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799589110] [2024-06-03 20:06:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:21,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:22,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:22,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799589110] [2024-06-03 20:06:22,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799589110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:22,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:22,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:22,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174304066] [2024-06-03 20:06:22,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:22,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:22,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:22,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:22,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1735 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:22,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:22,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:22,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:22,833 INFO L124 PetriNetUnfolderBase]: 2127/3207 cut-off events. [2024-06-03 20:06:22,833 INFO L125 PetriNetUnfolderBase]: For 102768/102768 co-relation queries the response was YES. [2024-06-03 20:06:22,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21028 conditions, 3207 events. 2127/3207 cut-off events. For 102768/102768 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15178 event pairs, 450 based on Foata normal form. 2/3207 useless extension candidates. Maximal degree in co-relation 20956. Up to 3080 conditions per place. [2024-06-03 20:06:22,859 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 33 changer transitions 0/205 dead transitions. [2024-06-03 20:06:22,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 205 transitions, 2341 flow [2024-06-03 20:06:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:06:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:06:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 20:06:22,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-03 20:06:22,860 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1735 flow. Second operand 7 states and 118 transitions. [2024-06-03 20:06:22,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 205 transitions, 2341 flow [2024-06-03 20:06:22,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 205 transitions, 2226 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:22,989 INFO L231 Difference]: Finished difference. Result has 149 places, 182 transitions, 1753 flow [2024-06-03 20:06:22,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1753, PETRI_PLACES=149, PETRI_TRANSITIONS=182} [2024-06-03 20:06:22,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-03 20:06:22,990 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 182 transitions, 1753 flow [2024-06-03 20:06:22,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:22,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:22,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:22,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:06:22,991 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:22,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:22,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1051965330, now seen corresponding path program 1 times [2024-06-03 20:06:22,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38619912] [2024-06-03 20:06:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:23,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:23,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38619912] [2024-06-03 20:06:23,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38619912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:23,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:23,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:23,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958914893] [2024-06-03 20:06:23,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:23,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:23,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:23,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:23,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 182 transitions, 1753 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:23,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:23,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:23,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:24,609 INFO L124 PetriNetUnfolderBase]: 2321/3527 cut-off events. [2024-06-03 20:06:24,609 INFO L125 PetriNetUnfolderBase]: For 130352/130371 co-relation queries the response was YES. [2024-06-03 20:06:24,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23829 conditions, 3527 events. 2321/3527 cut-off events. For 130352/130371 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17193 event pairs, 421 based on Foata normal form. 24/3545 useless extension candidates. Maximal degree in co-relation 23756. Up to 2574 conditions per place. [2024-06-03 20:06:24,637 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 77 changer transitions 0/226 dead transitions. [2024-06-03 20:06:24,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 226 transitions, 2573 flow [2024-06-03 20:06:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:06:24,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 20:06:24,638 INFO L175 Difference]: Start difference. First operand has 149 places, 182 transitions, 1753 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:06:24,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 226 transitions, 2573 flow [2024-06-03 20:06:24,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 226 transitions, 2529 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 20:06:24,754 INFO L231 Difference]: Finished difference. Result has 155 places, 184 transitions, 1935 flow [2024-06-03 20:06:24,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1935, PETRI_PLACES=155, PETRI_TRANSITIONS=184} [2024-06-03 20:06:24,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-03 20:06:24,754 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 184 transitions, 1935 flow [2024-06-03 20:06:24,754 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) [2024-06-03 20:06:24,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:24,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:24,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:06:24,755 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:24,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash -401286342, now seen corresponding path program 2 times [2024-06-03 20:06:24,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:24,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297839333] [2024-06-03 20:06:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:24,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:25,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:25,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297839333] [2024-06-03 20:06:25,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297839333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:25,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:25,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:25,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901495746] [2024-06-03 20:06:25,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:25,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:25,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:25,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:25,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:25,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:25,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 184 transitions, 1935 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:25,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:25,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:25,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:26,171 INFO L124 PetriNetUnfolderBase]: 2363/3601 cut-off events. [2024-06-03 20:06:26,171 INFO L125 PetriNetUnfolderBase]: For 140920/140939 co-relation queries the response was YES. [2024-06-03 20:06:26,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24707 conditions, 3601 events. 2363/3601 cut-off events. For 140920/140939 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17769 event pairs, 503 based on Foata normal form. 32/3627 useless extension candidates. Maximal degree in co-relation 24632. Up to 2936 conditions per place. [2024-06-03 20:06:26,201 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 136 selfloop transitions, 78 changer transitions 0/217 dead transitions. [2024-06-03 20:06:26,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 217 transitions, 2549 flow [2024-06-03 20:06:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:06:26,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-03 20:06:26,202 INFO L175 Difference]: Start difference. First operand has 155 places, 184 transitions, 1935 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:06:26,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 217 transitions, 2549 flow [2024-06-03 20:06:26,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 217 transitions, 2445 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:26,349 INFO L231 Difference]: Finished difference. Result has 159 places, 186 transitions, 2048 flow [2024-06-03 20:06:26,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2048, PETRI_PLACES=159, PETRI_TRANSITIONS=186} [2024-06-03 20:06:26,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-03 20:06:26,349 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 186 transitions, 2048 flow [2024-06-03 20:06:26,349 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) [2024-06-03 20:06:26,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:26,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:26,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:06:26,350 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)] === [2024-06-03 20:06:26,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1469518908, now seen corresponding path program 4 times [2024-06-03 20:06:26,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:26,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909531883] [2024-06-03 20:06:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:26,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:27,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:27,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909531883] [2024-06-03 20:06:27,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909531883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:27,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:27,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:27,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185253444] [2024-06-03 20:06:27,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:27,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:27,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:27,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:27,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:27,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:27,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 186 transitions, 2048 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:27,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:27,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:27,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:28,021 INFO L124 PetriNetUnfolderBase]: 2355/3589 cut-off events. [2024-06-03 20:06:28,021 INFO L125 PetriNetUnfolderBase]: For 136238/136257 co-relation queries the response was YES. [2024-06-03 20:06:28,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24993 conditions, 3589 events. 2355/3589 cut-off events. For 136238/136257 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17730 event pairs, 501 based on Foata normal form. 12/3595 useless extension candidates. Maximal degree in co-relation 24916. Up to 3044 conditions per place. [2024-06-03 20:06:28,052 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 137 selfloop transitions, 75 changer transitions 0/215 dead transitions. [2024-06-03 20:06:28,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 215 transitions, 2638 flow [2024-06-03 20:06:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:06:28,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:06:28,055 INFO L175 Difference]: Start difference. First operand has 159 places, 186 transitions, 2048 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:06:28,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 215 transitions, 2638 flow [2024-06-03 20:06:28,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 215 transitions, 2453 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:28,211 INFO L231 Difference]: Finished difference. Result has 161 places, 188 transitions, 2076 flow [2024-06-03 20:06:28,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2076, PETRI_PLACES=161, PETRI_TRANSITIONS=188} [2024-06-03 20:06:28,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-03 20:06:28,212 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 188 transitions, 2076 flow [2024-06-03 20:06:28,212 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) [2024-06-03 20:06:28,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:28,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:28,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:06:28,213 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:28,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:28,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1469515188, now seen corresponding path program 5 times [2024-06-03 20:06:28,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:28,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420952117] [2024-06-03 20:06:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:28,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420952117] [2024-06-03 20:06:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420952117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:29,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:29,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:29,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022775286] [2024-06-03 20:06:29,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:29,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:29,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:29,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:29,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:29,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:29,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 188 transitions, 2076 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:29,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:29,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:29,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:29,816 INFO L124 PetriNetUnfolderBase]: 2458/3758 cut-off events. [2024-06-03 20:06:29,816 INFO L125 PetriNetUnfolderBase]: For 152295/152314 co-relation queries the response was YES. [2024-06-03 20:06:29,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26428 conditions, 3758 events. 2458/3758 cut-off events. For 152295/152314 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18854 event pairs, 541 based on Foata normal form. 12/3764 useless extension candidates. Maximal degree in co-relation 26350. Up to 2822 conditions per place. [2024-06-03 20:06:29,850 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 138 selfloop transitions, 83 changer transitions 0/224 dead transitions. [2024-06-03 20:06:29,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 224 transitions, 2872 flow [2024-06-03 20:06:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:06:29,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-03 20:06:29,852 INFO L175 Difference]: Start difference. First operand has 161 places, 188 transitions, 2076 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:06:29,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 224 transitions, 2872 flow [2024-06-03 20:06:30,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 224 transitions, 2679 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:30,019 INFO L231 Difference]: Finished difference. Result has 163 places, 191 transitions, 2147 flow [2024-06-03 20:06:30,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2147, PETRI_PLACES=163, PETRI_TRANSITIONS=191} [2024-06-03 20:06:30,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-03 20:06:30,020 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 191 transitions, 2147 flow [2024-06-03 20:06:30,020 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) [2024-06-03 20:06:30,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:30,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:30,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:06:30,021 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:30,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash 949392718, now seen corresponding path program 2 times [2024-06-03 20:06:30,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:30,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026098121] [2024-06-03 20:06:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:30,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:30,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:30,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026098121] [2024-06-03 20:06:30,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026098121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:30,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:30,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:30,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420857469] [2024-06-03 20:06:30,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:30,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:30,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:30,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:30,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:30,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:30,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 191 transitions, 2147 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:30,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:30,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:30,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:31,376 INFO L124 PetriNetUnfolderBase]: 2468/3768 cut-off events. [2024-06-03 20:06:31,376 INFO L125 PetriNetUnfolderBase]: For 159190/159190 co-relation queries the response was YES. [2024-06-03 20:06:31,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26824 conditions, 3768 events. 2468/3768 cut-off events. For 159190/159190 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18941 event pairs, 561 based on Foata normal form. 2/3768 useless extension candidates. Maximal degree in co-relation 26745. Up to 3639 conditions per place. [2024-06-03 20:06:31,410 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 175 selfloop transitions, 35 changer transitions 0/213 dead transitions. [2024-06-03 20:06:31,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 213 transitions, 2741 flow [2024-06-03 20:06:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:06:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:06:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 20:06:31,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-03 20:06:31,412 INFO L175 Difference]: Start difference. First operand has 163 places, 191 transitions, 2147 flow. Second operand 7 states and 114 transitions. [2024-06-03 20:06:31,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 213 transitions, 2741 flow [2024-06-03 20:06:31,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 213 transitions, 2598 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:31,585 INFO L231 Difference]: Finished difference. Result has 166 places, 194 transitions, 2108 flow [2024-06-03 20:06:31,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2108, PETRI_PLACES=166, PETRI_TRANSITIONS=194} [2024-06-03 20:06:31,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-03 20:06:31,585 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 194 transitions, 2108 flow [2024-06-03 20:06:31,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:31,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:31,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:31,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:06:31,586 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:31,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2101461192, now seen corresponding path program 1 times [2024-06-03 20:06:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:31,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430802618] [2024-06-03 20:06:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:31,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:32,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:32,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430802618] [2024-06-03 20:06:32,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430802618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:32,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:32,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:32,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134667959] [2024-06-03 20:06:32,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:32,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:32,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:32,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:32,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:32,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:32,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 194 transitions, 2108 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:32,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:32,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:32,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:33,034 INFO L124 PetriNetUnfolderBase]: 2478/3783 cut-off events. [2024-06-03 20:06:33,034 INFO L125 PetriNetUnfolderBase]: For 164415/164415 co-relation queries the response was YES. [2024-06-03 20:06:33,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26930 conditions, 3783 events. 2478/3783 cut-off events. For 164415/164415 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18992 event pairs, 571 based on Foata normal form. 2/3783 useless extension candidates. Maximal degree in co-relation 26849. Up to 3703 conditions per place. [2024-06-03 20:06:33,071 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 184 selfloop transitions, 31 changer transitions 0/218 dead transitions. [2024-06-03 20:06:33,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 218 transitions, 2764 flow [2024-06-03 20:06:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:06:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:06:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 20:06:33,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-03 20:06:33,072 INFO L175 Difference]: Start difference. First operand has 166 places, 194 transitions, 2108 flow. Second operand 7 states and 114 transitions. [2024-06-03 20:06:33,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 218 transitions, 2764 flow [2024-06-03 20:06:33,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 2703 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:33,240 INFO L231 Difference]: Finished difference. Result has 169 places, 200 transitions, 2209 flow [2024-06-03 20:06:33,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2209, PETRI_PLACES=169, PETRI_TRANSITIONS=200} [2024-06-03 20:06:33,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-03 20:06:33,241 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 200 transitions, 2209 flow [2024-06-03 20:06:33,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:33,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:33,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:33,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:06:33,242 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:33,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:33,243 INFO L85 PathProgramCache]: Analyzing trace with hash 47445626, now seen corresponding path program 3 times [2024-06-03 20:06:33,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:33,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998338753] [2024-06-03 20:06:33,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:33,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:33,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:33,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998338753] [2024-06-03 20:06:33,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998338753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:33,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:33,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:33,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216975730] [2024-06-03 20:06:33,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:33,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:33,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:33,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:33,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:33,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 200 transitions, 2209 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:33,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:33,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:33,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:34,665 INFO L124 PetriNetUnfolderBase]: 2442/3730 cut-off events. [2024-06-03 20:06:34,666 INFO L125 PetriNetUnfolderBase]: For 171843/171862 co-relation queries the response was YES. [2024-06-03 20:06:34,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26375 conditions, 3730 events. 2442/3730 cut-off events. For 171843/171862 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18668 event pairs, 527 based on Foata normal form. 28/3752 useless extension candidates. Maximal degree in co-relation 26293. Up to 3047 conditions per place. [2024-06-03 20:06:34,701 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 154 selfloop transitions, 74 changer transitions 0/231 dead transitions. [2024-06-03 20:06:34,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 231 transitions, 2803 flow [2024-06-03 20:06:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:34,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:06:34,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:06:34,702 INFO L175 Difference]: Start difference. First operand has 169 places, 200 transitions, 2209 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:06:34,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 231 transitions, 2803 flow [2024-06-03 20:06:34,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 231 transitions, 2730 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-03 20:06:34,943 INFO L231 Difference]: Finished difference. Result has 174 places, 200 transitions, 2295 flow [2024-06-03 20:06:34,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2295, PETRI_PLACES=174, PETRI_TRANSITIONS=200} [2024-06-03 20:06:34,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-03 20:06:34,944 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 200 transitions, 2295 flow [2024-06-03 20:06:34,944 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) [2024-06-03 20:06:34,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:34,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:34,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:06:34,944 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:34,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:34,945 INFO L85 PathProgramCache]: Analyzing trace with hash 966056290, now seen corresponding path program 4 times [2024-06-03 20:06:34,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:34,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210758180] [2024-06-03 20:06:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:34,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:35,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:35,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210758180] [2024-06-03 20:06:35,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210758180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:35,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:35,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:35,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639738585] [2024-06-03 20:06:35,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:35,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:35,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:35,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:35,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:35,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 200 transitions, 2295 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:35,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:35,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:35,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:36,449 INFO L124 PetriNetUnfolderBase]: 2611/4009 cut-off events. [2024-06-03 20:06:36,449 INFO L125 PetriNetUnfolderBase]: For 194785/194804 co-relation queries the response was YES. [2024-06-03 20:06:36,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29085 conditions, 4009 events. 2611/4009 cut-off events. For 194785/194804 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20587 event pairs, 560 based on Foata normal form. 24/4027 useless extension candidates. Maximal degree in co-relation 29001. Up to 3012 conditions per place. [2024-06-03 20:06:36,487 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 75 changer transitions 0/238 dead transitions. [2024-06-03 20:06:36,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 238 transitions, 3135 flow [2024-06-03 20:06:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:06:36,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-03 20:06:36,489 INFO L175 Difference]: Start difference. First operand has 174 places, 200 transitions, 2295 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:06:36,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 238 transitions, 3135 flow [2024-06-03 20:06:36,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 238 transitions, 2972 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:06:36,762 INFO L231 Difference]: Finished difference. Result has 175 places, 202 transitions, 2363 flow [2024-06-03 20:06:36,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2363, PETRI_PLACES=175, PETRI_TRANSITIONS=202} [2024-06-03 20:06:36,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-03 20:06:36,763 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 202 transitions, 2363 flow [2024-06-03 20:06:36,763 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) [2024-06-03 20:06:36,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:36,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:36,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:06:36,764 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:36,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 56649836, now seen corresponding path program 5 times [2024-06-03 20:06:36,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:36,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322731975] [2024-06-03 20:06:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:37,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:37,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322731975] [2024-06-03 20:06:37,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322731975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:37,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:37,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:37,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834471805] [2024-06-03 20:06:37,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:37,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:37,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:37,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:37,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 202 transitions, 2363 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:37,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:37,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:37,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:38,274 INFO L124 PetriNetUnfolderBase]: 2680/4132 cut-off events. [2024-06-03 20:06:38,274 INFO L125 PetriNetUnfolderBase]: For 210587/210606 co-relation queries the response was YES. [2024-06-03 20:06:38,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30164 conditions, 4132 events. 2680/4132 cut-off events. For 210587/210606 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21513 event pairs, 526 based on Foata normal form. 24/4150 useless extension candidates. Maximal degree in co-relation 30079. Up to 2266 conditions per place. [2024-06-03 20:06:38,310 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 154 selfloop transitions, 83 changer transitions 0/240 dead transitions. [2024-06-03 20:06:38,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 240 transitions, 3211 flow [2024-06-03 20:06:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:06:38,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-03 20:06:38,312 INFO L175 Difference]: Start difference. First operand has 175 places, 202 transitions, 2363 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:06:38,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 240 transitions, 3211 flow [2024-06-03 20:06:38,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 240 transitions, 3100 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:38,625 INFO L231 Difference]: Finished difference. Result has 179 places, 204 transitions, 2502 flow [2024-06-03 20:06:38,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2502, PETRI_PLACES=179, PETRI_TRANSITIONS=204} [2024-06-03 20:06:38,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-03 20:06:38,626 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 204 transitions, 2502 flow [2024-06-03 20:06:38,626 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) [2024-06-03 20:06:38,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:38,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:38,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:06:38,627 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:38,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:38,627 INFO L85 PathProgramCache]: Analyzing trace with hash -760241152, now seen corresponding path program 6 times [2024-06-03 20:06:38,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:38,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548160316] [2024-06-03 20:06:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:38,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:39,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:39,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548160316] [2024-06-03 20:06:39,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548160316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:39,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:39,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277954181] [2024-06-03 20:06:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:39,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:39,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:39,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:39,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 204 transitions, 2502 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:39,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:39,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:39,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:40,215 INFO L124 PetriNetUnfolderBase]: 2705/4179 cut-off events. [2024-06-03 20:06:40,216 INFO L125 PetriNetUnfolderBase]: For 216934/216953 co-relation queries the response was YES. [2024-06-03 20:06:40,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30561 conditions, 4179 events. 2705/4179 cut-off events. For 216934/216953 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21929 event pairs, 637 based on Foata normal form. 28/4201 useless extension candidates. Maximal degree in co-relation 30474. Up to 3630 conditions per place. [2024-06-03 20:06:40,253 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 170 selfloop transitions, 63 changer transitions 0/236 dead transitions. [2024-06-03 20:06:40,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 236 transitions, 3142 flow [2024-06-03 20:06:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:06:40,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:06:40,255 INFO L175 Difference]: Start difference. First operand has 179 places, 204 transitions, 2502 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:06:40,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 236 transitions, 3142 flow [2024-06-03 20:06:40,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 236 transitions, 3032 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:40,608 INFO L231 Difference]: Finished difference. Result has 183 places, 205 transitions, 2566 flow [2024-06-03 20:06:40,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2566, PETRI_PLACES=183, PETRI_TRANSITIONS=205} [2024-06-03 20:06:40,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-03 20:06:40,609 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 205 transitions, 2566 flow [2024-06-03 20:06:40,609 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) [2024-06-03 20:06:40,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:40,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:40,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:06:40,609 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:40,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:40,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1747198524, now seen corresponding path program 3 times [2024-06-03 20:06:40,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:40,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034153622] [2024-06-03 20:06:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:40,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:41,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:41,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034153622] [2024-06-03 20:06:41,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034153622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:41,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:41,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:41,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570814419] [2024-06-03 20:06:41,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:41,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:41,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:41,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:41,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:41,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:41,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 205 transitions, 2566 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:41,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:41,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:41,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:42,068 INFO L124 PetriNetUnfolderBase]: 2719/4197 cut-off events. [2024-06-03 20:06:42,068 INFO L125 PetriNetUnfolderBase]: For 211434/211434 co-relation queries the response was YES. [2024-06-03 20:06:42,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30844 conditions, 4197 events. 2719/4197 cut-off events. For 211434/211434 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22097 event pairs, 642 based on Foata normal form. 6/4201 useless extension candidates. Maximal degree in co-relation 30755. Up to 4062 conditions per place. [2024-06-03 20:06:42,108 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 39 changer transitions 0/230 dead transitions. [2024-06-03 20:06:42,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 230 transitions, 3146 flow [2024-06-03 20:06:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:06:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:06:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-03 20:06:42,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-03 20:06:42,110 INFO L175 Difference]: Start difference. First operand has 183 places, 205 transitions, 2566 flow. Second operand 6 states and 111 transitions. [2024-06-03 20:06:42,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 230 transitions, 3146 flow [2024-06-03 20:06:42,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 230 transitions, 2989 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 20:06:42,417 INFO L231 Difference]: Finished difference. Result has 182 places, 208 transitions, 2553 flow [2024-06-03 20:06:42,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2553, PETRI_PLACES=182, PETRI_TRANSITIONS=208} [2024-06-03 20:06:42,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-03 20:06:42,418 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 208 transitions, 2553 flow [2024-06-03 20:06:42,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:42,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:42,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:42,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:06:42,419 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:42,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2043715990, now seen corresponding path program 2 times [2024-06-03 20:06:42,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:42,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872435944] [2024-06-03 20:06:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:42,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:43,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:43,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872435944] [2024-06-03 20:06:43,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872435944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:43,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:43,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:43,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260605400] [2024-06-03 20:06:43,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:43,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:43,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:43,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:43,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:43,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:43,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 208 transitions, 2553 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:43,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:43,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:43,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:43,918 INFO L124 PetriNetUnfolderBase]: 2713/4188 cut-off events. [2024-06-03 20:06:43,918 INFO L125 PetriNetUnfolderBase]: For 202890/202890 co-relation queries the response was YES. [2024-06-03 20:06:43,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30664 conditions, 4188 events. 2713/4188 cut-off events. For 202890/202890 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22057 event pairs, 647 based on Foata normal form. 2/4188 useless extension candidates. Maximal degree in co-relation 30575. Up to 4122 conditions per place. [2024-06-03 20:06:43,963 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 195 selfloop transitions, 26 changer transitions 0/224 dead transitions. [2024-06-03 20:06:43,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 224 transitions, 3057 flow [2024-06-03 20:06:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:06:43,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:06:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 20:06:43,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:06:43,964 INFO L175 Difference]: Start difference. First operand has 182 places, 208 transitions, 2553 flow. Second operand 6 states and 102 transitions. [2024-06-03 20:06:43,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 224 transitions, 3057 flow [2024-06-03 20:06:44,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 224 transitions, 2963 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:44,384 INFO L231 Difference]: Finished difference. Result has 184 places, 208 transitions, 2517 flow [2024-06-03 20:06:44,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2517, PETRI_PLACES=184, PETRI_TRANSITIONS=208} [2024-06-03 20:06:44,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-03 20:06:44,385 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 208 transitions, 2517 flow [2024-06-03 20:06:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:44,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:44,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:06:44,386 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:44,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash -846974204, now seen corresponding path program 1 times [2024-06-03 20:06:44,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:44,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928468810] [2024-06-03 20:06:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:44,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:45,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:45,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928468810] [2024-06-03 20:06:45,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928468810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:45,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:45,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:45,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047892426] [2024-06-03 20:06:45,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:45,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:45,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:45,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:45,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:45,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:45,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 208 transitions, 2517 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:45,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:45,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:45,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:45,708 INFO L124 PetriNetUnfolderBase]: 2731/4215 cut-off events. [2024-06-03 20:06:45,709 INFO L125 PetriNetUnfolderBase]: For 210806/210825 co-relation queries the response was YES. [2024-06-03 20:06:45,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30970 conditions, 4215 events. 2731/4215 cut-off events. For 210806/210825 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22120 event pairs, 649 based on Foata normal form. 16/4227 useless extension candidates. Maximal degree in co-relation 30880. Up to 4046 conditions per place. [2024-06-03 20:06:45,750 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 197 selfloop transitions, 40 changer transitions 0/240 dead transitions. [2024-06-03 20:06:45,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 240 transitions, 3423 flow [2024-06-03 20:06:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:06:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:06:45,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 20:06:45,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-03 20:06:45,751 INFO L175 Difference]: Start difference. First operand has 184 places, 208 transitions, 2517 flow. Second operand 7 states and 116 transitions. [2024-06-03 20:06:45,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 240 transitions, 3423 flow [2024-06-03 20:06:46,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 240 transitions, 3337 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:46,164 INFO L231 Difference]: Finished difference. Result has 187 places, 221 transitions, 2742 flow [2024-06-03 20:06:46,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2742, PETRI_PLACES=187, PETRI_TRANSITIONS=221} [2024-06-03 20:06:46,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-03 20:06:46,165 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 221 transitions, 2742 flow [2024-06-03 20:06:46,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:46,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:46,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:46,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:06:46,166 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:46,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1843531816, now seen corresponding path program 2 times [2024-06-03 20:06:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:46,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103271841] [2024-06-03 20:06:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:46,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:46,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:46,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103271841] [2024-06-03 20:06:46,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103271841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:46,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:46,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:46,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181324865] [2024-06-03 20:06:46,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:46,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:46,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:46,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:46,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:46,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:46,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 221 transitions, 2742 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:46,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:46,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:46,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:47,680 INFO L124 PetriNetUnfolderBase]: 2830/4351 cut-off events. [2024-06-03 20:06:47,680 INFO L125 PetriNetUnfolderBase]: For 232515/232515 co-relation queries the response was YES. [2024-06-03 20:06:47,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33019 conditions, 4351 events. 2830/4351 cut-off events. For 232515/232515 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22950 event pairs, 648 based on Foata normal form. 6/4355 useless extension candidates. Maximal degree in co-relation 32927. Up to 4240 conditions per place. [2024-06-03 20:06:47,727 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 223 selfloop transitions, 36 changer transitions 0/262 dead transitions. [2024-06-03 20:06:47,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 262 transitions, 3754 flow [2024-06-03 20:06:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:47,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:06:47,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:06:47,728 INFO L175 Difference]: Start difference. First operand has 187 places, 221 transitions, 2742 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:06:47,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 262 transitions, 3754 flow [2024-06-03 20:06:48,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 262 transitions, 3634 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-03 20:06:48,174 INFO L231 Difference]: Finished difference. Result has 194 places, 241 transitions, 3073 flow [2024-06-03 20:06:48,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3073, PETRI_PLACES=194, PETRI_TRANSITIONS=241} [2024-06-03 20:06:48,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-03 20:06:48,175 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 241 transitions, 3073 flow [2024-06-03 20:06:48,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:48,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:48,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:48,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:06:48,175 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:48,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash 388453606, now seen corresponding path program 3 times [2024-06-03 20:06:48,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:48,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628232470] [2024-06-03 20:06:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:48,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:48,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:48,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628232470] [2024-06-03 20:06:48,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628232470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:48,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:48,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:48,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687470228] [2024-06-03 20:06:48,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:48,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:48,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:48,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:48,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 241 transitions, 3073 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:48,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:48,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:48,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:49,715 INFO L124 PetriNetUnfolderBase]: 2916/4471 cut-off events. [2024-06-03 20:06:49,715 INFO L125 PetriNetUnfolderBase]: For 248319/248319 co-relation queries the response was YES. [2024-06-03 20:06:49,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34882 conditions, 4471 events. 2916/4471 cut-off events. For 248319/248319 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23545 event pairs, 660 based on Foata normal form. 6/4475 useless extension candidates. Maximal degree in co-relation 34787. Up to 4277 conditions per place. [2024-06-03 20:06:49,764 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 56 changer transitions 0/286 dead transitions. [2024-06-03 20:06:49,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 286 transitions, 4159 flow [2024-06-03 20:06:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:06:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:06:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:06:49,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:06:49,766 INFO L175 Difference]: Start difference. First operand has 194 places, 241 transitions, 3073 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:06:49,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 286 transitions, 4159 flow [2024-06-03 20:06:50,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 286 transitions, 3995 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-03 20:06:50,286 INFO L231 Difference]: Finished difference. Result has 200 places, 261 transitions, 3456 flow [2024-06-03 20:06:50,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3456, PETRI_PLACES=200, PETRI_TRANSITIONS=261} [2024-06-03 20:06:50,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-03 20:06:50,287 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 261 transitions, 3456 flow [2024-06-03 20:06:50,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:50,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:50,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:50,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:06:50,288 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:50,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:50,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2044146580, now seen corresponding path program 1 times [2024-06-03 20:06:50,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:50,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993959565] [2024-06-03 20:06:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:50,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:51,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:51,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993959565] [2024-06-03 20:06:51,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993959565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:51,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:51,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:51,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608333857] [2024-06-03 20:06:51,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:51,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:51,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:51,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:51,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:51,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:51,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 261 transitions, 3456 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:51,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:51,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:51,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:52,134 INFO L124 PetriNetUnfolderBase]: 2911/4464 cut-off events. [2024-06-03 20:06:52,135 INFO L125 PetriNetUnfolderBase]: For 255603/255603 co-relation queries the response was YES. [2024-06-03 20:06:52,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35595 conditions, 4464 events. 2911/4464 cut-off events. For 255603/255603 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23509 event pairs, 670 based on Foata normal form. 2/4464 useless extension candidates. Maximal degree in co-relation 35496. Up to 4429 conditions per place. [2024-06-03 20:06:52,173 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 256 selfloop transitions, 13 changer transitions 0/272 dead transitions. [2024-06-03 20:06:52,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 272 transitions, 4066 flow [2024-06-03 20:06:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:06:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:06:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-03 20:06:52,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-03 20:06:52,174 INFO L175 Difference]: Start difference. First operand has 200 places, 261 transitions, 3456 flow. Second operand 5 states and 81 transitions. [2024-06-03 20:06:52,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 272 transitions, 4066 flow [2024-06-03 20:06:52,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 272 transitions, 3940 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-03 20:06:52,540 INFO L231 Difference]: Finished difference. Result has 203 places, 263 transitions, 3403 flow [2024-06-03 20:06:52,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3403, PETRI_PLACES=203, PETRI_TRANSITIONS=263} [2024-06-03 20:06:52,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-03 20:06:52,541 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 263 transitions, 3403 flow [2024-06-03 20:06:52,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:52,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:52,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:52,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:06:52,542 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:52,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:52,542 INFO L85 PathProgramCache]: Analyzing trace with hash -299877389, now seen corresponding path program 1 times [2024-06-03 20:06:52,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:52,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971400613] [2024-06-03 20:06:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:52,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:53,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:53,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971400613] [2024-06-03 20:06:53,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971400613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:53,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:53,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:53,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855414680] [2024-06-03 20:06:53,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:53,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:53,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:53,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:53,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:53,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:53,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 263 transitions, 3403 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:53,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:53,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:53,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:54,487 INFO L124 PetriNetUnfolderBase]: 2891/4435 cut-off events. [2024-06-03 20:06:54,488 INFO L125 PetriNetUnfolderBase]: For 262461/262483 co-relation queries the response was YES. [2024-06-03 20:06:54,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35001 conditions, 4435 events. 2891/4435 cut-off events. For 262461/262483 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23183 event pairs, 501 based on Foata normal form. 21/4450 useless extension candidates. Maximal degree in co-relation 34900. Up to 4189 conditions per place. [2024-06-03 20:06:54,531 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 25 changer transitions 0/292 dead transitions. [2024-06-03 20:06:54,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 292 transitions, 4091 flow [2024-06-03 20:06:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:06:54,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:06:54,533 INFO L175 Difference]: Start difference. First operand has 203 places, 263 transitions, 3403 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:06:54,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 292 transitions, 4091 flow [2024-06-03 20:06:54,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 292 transitions, 4034 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 20:06:54,989 INFO L231 Difference]: Finished difference. Result has 208 places, 263 transitions, 3402 flow [2024-06-03 20:06:54,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3346, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3402, PETRI_PLACES=208, PETRI_TRANSITIONS=263} [2024-06-03 20:06:54,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-03 20:06:54,991 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 263 transitions, 3402 flow [2024-06-03 20:06:54,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:54,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:54,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:54,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:06:54,992 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)] === [2024-06-03 20:06:54,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1433718709, now seen corresponding path program 2 times [2024-06-03 20:06:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:54,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545170149] [2024-06-03 20:06:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:56,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545170149] [2024-06-03 20:06:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545170149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:56,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:56,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:06:56,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892549019] [2024-06-03 20:06:56,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:56,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:06:56,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:06:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:06:56,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:56,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 263 transitions, 3402 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:56,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:56,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:56,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:57,428 INFO L124 PetriNetUnfolderBase]: 2932/4504 cut-off events. [2024-06-03 20:06:57,428 INFO L125 PetriNetUnfolderBase]: For 273179/273201 co-relation queries the response was YES. [2024-06-03 20:06:57,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35652 conditions, 4504 events. 2932/4504 cut-off events. For 273179/273201 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23806 event pairs, 633 based on Foata normal form. 28/4528 useless extension candidates. Maximal degree in co-relation 35550. Up to 4218 conditions per place. [2024-06-03 20:06:57,469 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 41 changer transitions 0/299 dead transitions. [2024-06-03 20:06:57,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 299 transitions, 4172 flow [2024-06-03 20:06:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-03 20:06:57,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-03 20:06:57,470 INFO L175 Difference]: Start difference. First operand has 208 places, 263 transitions, 3402 flow. Second operand 9 states and 146 transitions. [2024-06-03 20:06:57,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 299 transitions, 4172 flow [2024-06-03 20:06:57,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 299 transitions, 4040 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:06:57,880 INFO L231 Difference]: Finished difference. Result has 210 places, 264 transitions, 3398 flow [2024-06-03 20:06:57,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3398, PETRI_PLACES=210, PETRI_TRANSITIONS=264} [2024-06-03 20:06:57,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-03 20:06:57,881 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 264 transitions, 3398 flow [2024-06-03 20:06:57,881 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) [2024-06-03 20:06:57,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:57,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:57,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:06:57,882 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)] === [2024-06-03 20:06:57,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:57,882 INFO L85 PathProgramCache]: Analyzing trace with hash -412460379, now seen corresponding path program 3 times [2024-06-03 20:06:57,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:57,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933090772] [2024-06-03 20:06:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:57,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:59,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:59,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933090772] [2024-06-03 20:06:59,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933090772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:59,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:59,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:06:59,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474294573] [2024-06-03 20:06:59,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:59,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:06:59,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:06:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:06:59,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:59,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 264 transitions, 3398 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:59,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:59,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:59,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:00,110 INFO L124 PetriNetUnfolderBase]: 2973/4575 cut-off events. [2024-06-03 20:07:00,111 INFO L125 PetriNetUnfolderBase]: For 287497/287519 co-relation queries the response was YES. [2024-06-03 20:07:00,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35849 conditions, 4575 events. 2973/4575 cut-off events. For 287497/287519 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24316 event pairs, 643 based on Foata normal form. 28/4599 useless extension candidates. Maximal degree in co-relation 35747. Up to 4233 conditions per place. [2024-06-03 20:07:00,166 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 41 changer transitions 0/300 dead transitions. [2024-06-03 20:07:00,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 300 transitions, 4165 flow [2024-06-03 20:07:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:07:00,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:07:00,168 INFO L175 Difference]: Start difference. First operand has 210 places, 264 transitions, 3398 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:07:00,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 300 transitions, 4165 flow [2024-06-03 20:07:00,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 300 transitions, 4055 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:00,797 INFO L231 Difference]: Finished difference. Result has 212 places, 265 transitions, 3415 flow [2024-06-03 20:07:00,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3415, PETRI_PLACES=212, PETRI_TRANSITIONS=265} [2024-06-03 20:07:00,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-03 20:07:00,797 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 265 transitions, 3415 flow [2024-06-03 20:07:00,798 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) [2024-06-03 20:07:00,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:00,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:00,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:07:00,798 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:00,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:00,798 INFO L85 PathProgramCache]: Analyzing trace with hash 143665588, now seen corresponding path program 1 times [2024-06-03 20:07:00,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:00,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345918659] [2024-06-03 20:07:00,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:00,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:01,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:01,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345918659] [2024-06-03 20:07:01,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345918659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:01,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:01,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:01,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438214496] [2024-06-03 20:07:01,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:01,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:01,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:01,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:01,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:01,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:01,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 265 transitions, 3415 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:01,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:01,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:01,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:02,538 INFO L124 PetriNetUnfolderBase]: 2993/4603 cut-off events. [2024-06-03 20:07:02,539 INFO L125 PetriNetUnfolderBase]: For 289924/289924 co-relation queries the response was YES. [2024-06-03 20:07:02,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36124 conditions, 4603 events. 2993/4603 cut-off events. For 289924/289924 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24494 event pairs, 667 based on Foata normal form. 4/4605 useless extension candidates. Maximal degree in co-relation 36021. Up to 4381 conditions per place. [2024-06-03 20:07:02,586 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 56 changer transitions 0/299 dead transitions. [2024-06-03 20:07:02,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 299 transitions, 4321 flow [2024-06-03 20:07:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:07:02,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-03 20:07:02,592 INFO L175 Difference]: Start difference. First operand has 212 places, 265 transitions, 3415 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:07:02,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 299 transitions, 4321 flow [2024-06-03 20:07:03,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 299 transitions, 4209 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:03,017 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 3527 flow [2024-06-03 20:07:03,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3527, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-03 20:07:03,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-03 20:07:03,018 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 3527 flow [2024-06-03 20:07:03,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:03,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:03,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:03,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:07:03,018 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:03,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:03,019 INFO L85 PathProgramCache]: Analyzing trace with hash -726508483, now seen corresponding path program 1 times [2024-06-03 20:07:03,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:03,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24076321] [2024-06-03 20:07:03,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:03,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:03,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:03,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24076321] [2024-06-03 20:07:03,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24076321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:03,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:03,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:07:03,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679589608] [2024-06-03 20:07:03,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:03,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:07:03,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:07:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:07:03,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:03,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 3527 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:03,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:03,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:03,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:04,545 INFO L124 PetriNetUnfolderBase]: 3014/4631 cut-off events. [2024-06-03 20:07:04,545 INFO L125 PetriNetUnfolderBase]: For 298757/298757 co-relation queries the response was YES. [2024-06-03 20:07:04,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36835 conditions, 4631 events. 3014/4631 cut-off events. For 298757/298757 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24644 event pairs, 677 based on Foata normal form. 1/4630 useless extension candidates. Maximal degree in co-relation 36731. Up to 4549 conditions per place. [2024-06-03 20:07:04,592 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 32 changer transitions 0/299 dead transitions. [2024-06-03 20:07:04,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 299 transitions, 4456 flow [2024-06-03 20:07:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 20:07:04,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-03 20:07:04,594 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 3527 flow. Second operand 7 states and 113 transitions. [2024-06-03 20:07:04,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 299 transitions, 4456 flow [2024-06-03 20:07:05,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 299 transitions, 4360 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 20:07:05,148 INFO L231 Difference]: Finished difference. Result has 217 places, 280 transitions, 3695 flow [2024-06-03 20:07:05,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3695, PETRI_PLACES=217, PETRI_TRANSITIONS=280} [2024-06-03 20:07:05,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-03 20:07:05,149 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 280 transitions, 3695 flow [2024-06-03 20:07:05,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:05,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:05,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:05,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:07:05,149 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:05,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:05,149 INFO L85 PathProgramCache]: Analyzing trace with hash 75619665, now seen corresponding path program 2 times [2024-06-03 20:07:05,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:05,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512943395] [2024-06-03 20:07:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:05,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:05,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512943395] [2024-06-03 20:07:05,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512943395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:05,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:05,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:07:05,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448163294] [2024-06-03 20:07:05,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:05,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:07:05,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:05,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:07:05,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:07:05,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:05,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 280 transitions, 3695 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:05,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:05,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:05,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:06,672 INFO L124 PetriNetUnfolderBase]: 3011/4627 cut-off events. [2024-06-03 20:07:06,672 INFO L125 PetriNetUnfolderBase]: For 307215/307215 co-relation queries the response was YES. [2024-06-03 20:07:06,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36940 conditions, 4627 events. 3011/4627 cut-off events. For 307215/307215 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24653 event pairs, 675 based on Foata normal form. 1/4626 useless extension candidates. Maximal degree in co-relation 36833. Up to 4573 conditions per place. [2024-06-03 20:07:06,714 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 270 selfloop transitions, 22 changer transitions 0/295 dead transitions. [2024-06-03 20:07:06,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 295 transitions, 4335 flow [2024-06-03 20:07:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 20:07:06,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-03 20:07:06,715 INFO L175 Difference]: Start difference. First operand has 217 places, 280 transitions, 3695 flow. Second operand 7 states and 108 transitions. [2024-06-03 20:07:06,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 295 transitions, 4335 flow [2024-06-03 20:07:07,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 295 transitions, 4265 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 20:07:07,230 INFO L231 Difference]: Finished difference. Result has 221 places, 280 transitions, 3675 flow [2024-06-03 20:07:07,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3675, PETRI_PLACES=221, PETRI_TRANSITIONS=280} [2024-06-03 20:07:07,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-03 20:07:07,231 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 280 transitions, 3675 flow [2024-06-03 20:07:07,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:07,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:07,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:07,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:07:07,232 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:07,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash -197309381, now seen corresponding path program 4 times [2024-06-03 20:07:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:07,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273250408] [2024-06-03 20:07:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:08,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273250408] [2024-06-03 20:07:08,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273250408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:08,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:08,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:07:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529977313] [2024-06-03 20:07:08,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:08,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:07:08,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:08,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:07:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:07:08,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:08,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 280 transitions, 3675 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:08,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:08,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:08,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:09,824 INFO L124 PetriNetUnfolderBase]: 3052/4701 cut-off events. [2024-06-03 20:07:09,825 INFO L125 PetriNetUnfolderBase]: For 331405/331425 co-relation queries the response was YES. [2024-06-03 20:07:09,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37562 conditions, 4701 events. 3052/4701 cut-off events. For 331405/331425 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25155 event pairs, 660 based on Foata normal form. 19/4714 useless extension candidates. Maximal degree in co-relation 37453. Up to 4235 conditions per place. [2024-06-03 20:07:09,880 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 253 selfloop transitions, 59 changer transitions 0/315 dead transitions. [2024-06-03 20:07:09,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 315 transitions, 4478 flow [2024-06-03 20:07:09,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 20:07:09,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-03 20:07:09,882 INFO L175 Difference]: Start difference. First operand has 221 places, 280 transitions, 3675 flow. Second operand 9 states and 149 transitions. [2024-06-03 20:07:09,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 315 transitions, 4478 flow [2024-06-03 20:07:10,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 315 transitions, 4406 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:10,581 INFO L231 Difference]: Finished difference. Result has 225 places, 281 transitions, 3768 flow [2024-06-03 20:07:10,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3603, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3768, PETRI_PLACES=225, PETRI_TRANSITIONS=281} [2024-06-03 20:07:10,582 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-03 20:07:10,582 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 281 transitions, 3768 flow [2024-06-03 20:07:10,582 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) [2024-06-03 20:07:10,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:10,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:10,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:07:10,583 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:10,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:10,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1689667709, now seen corresponding path program 5 times [2024-06-03 20:07:10,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:10,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698870946] [2024-06-03 20:07:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:10,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:11,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:11,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698870946] [2024-06-03 20:07:11,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698870946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:11,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:11,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:11,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978157227] [2024-06-03 20:07:11,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:11,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:11,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:11,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:11,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:11,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 281 transitions, 3768 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:11,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:11,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:11,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:12,681 INFO L124 PetriNetUnfolderBase]: 3032/4669 cut-off events. [2024-06-03 20:07:12,681 INFO L125 PetriNetUnfolderBase]: For 331351/331371 co-relation queries the response was YES. [2024-06-03 20:07:12,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37284 conditions, 4669 events. 3032/4669 cut-off events. For 331351/331371 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24984 event pairs, 606 based on Foata normal form. 19/4682 useless extension candidates. Maximal degree in co-relation 37174. Up to 3950 conditions per place. [2024-06-03 20:07:12,734 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 239 selfloop transitions, 69 changer transitions 0/311 dead transitions. [2024-06-03 20:07:12,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 311 transitions, 4512 flow [2024-06-03 20:07:12,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:07:12,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:07:12,736 INFO L175 Difference]: Start difference. First operand has 225 places, 281 transitions, 3768 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:07:12,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 311 transitions, 4512 flow [2024-06-03 20:07:13,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 311 transitions, 4378 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:13,321 INFO L231 Difference]: Finished difference. Result has 228 places, 282 transitions, 3819 flow [2024-06-03 20:07:13,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3819, PETRI_PLACES=228, PETRI_TRANSITIONS=282} [2024-06-03 20:07:13,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-03 20:07:13,323 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 282 transitions, 3819 flow [2024-06-03 20:07:13,323 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) [2024-06-03 20:07:13,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:13,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:13,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:07:13,323 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:13,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash 438586383, now seen corresponding path program 6 times [2024-06-03 20:07:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:13,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53903100] [2024-06-03 20:07:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:14,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:14,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53903100] [2024-06-03 20:07:14,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53903100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:14,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:14,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:07:14,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870560710] [2024-06-03 20:07:14,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:14,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:07:14,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:07:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:07:14,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:14,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 282 transitions, 3819 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:14,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:14,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:14,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:15,539 INFO L124 PetriNetUnfolderBase]: 3012/4637 cut-off events. [2024-06-03 20:07:15,540 INFO L125 PetriNetUnfolderBase]: For 327077/327097 co-relation queries the response was YES. [2024-06-03 20:07:15,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36805 conditions, 4637 events. 3012/4637 cut-off events. For 327077/327097 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24684 event pairs, 612 based on Foata normal form. 19/4650 useless extension candidates. Maximal degree in co-relation 36693. Up to 3903 conditions per place. [2024-06-03 20:07:15,590 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 237 selfloop transitions, 80 changer transitions 0/320 dead transitions. [2024-06-03 20:07:15,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 320 transitions, 4621 flow [2024-06-03 20:07:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 20:07:15,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-03 20:07:15,592 INFO L175 Difference]: Start difference. First operand has 228 places, 282 transitions, 3819 flow. Second operand 9 states and 157 transitions. [2024-06-03 20:07:15,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 320 transitions, 4621 flow [2024-06-03 20:07:16,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 320 transitions, 4303 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-03 20:07:16,418 INFO L231 Difference]: Finished difference. Result has 229 places, 282 transitions, 3667 flow [2024-06-03 20:07:16,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3667, PETRI_PLACES=229, PETRI_TRANSITIONS=282} [2024-06-03 20:07:16,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-03 20:07:16,419 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 282 transitions, 3667 flow [2024-06-03 20:07:16,419 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) [2024-06-03 20:07:16,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:16,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:16,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:07:16,420 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:16,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:16,421 INFO L85 PathProgramCache]: Analyzing trace with hash 152931178, now seen corresponding path program 2 times [2024-06-03 20:07:16,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:16,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016566386] [2024-06-03 20:07:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:16,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:17,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:17,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016566386] [2024-06-03 20:07:17,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016566386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:17,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:17,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054964771] [2024-06-03 20:07:17,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:17,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:17,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:17,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:17,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:17,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 282 transitions, 3667 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:17,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:17,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:17,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:18,335 INFO L124 PetriNetUnfolderBase]: 3064/4705 cut-off events. [2024-06-03 20:07:18,335 INFO L125 PetriNetUnfolderBase]: For 320974/320974 co-relation queries the response was YES. [2024-06-03 20:07:18,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36614 conditions, 4705 events. 3064/4705 cut-off events. For 320974/320974 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25064 event pairs, 657 based on Foata normal form. 4/4707 useless extension candidates. Maximal degree in co-relation 36503. Up to 4453 conditions per place. [2024-06-03 20:07:18,385 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 251 selfloop transitions, 59 changer transitions 0/313 dead transitions. [2024-06-03 20:07:18,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 4699 flow [2024-06-03 20:07:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:07:18,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 20:07:18,395 INFO L175 Difference]: Start difference. First operand has 229 places, 282 transitions, 3667 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:07:18,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 4699 flow [2024-06-03 20:07:19,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 313 transitions, 4503 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 20:07:19,111 INFO L231 Difference]: Finished difference. Result has 229 places, 288 transitions, 3687 flow [2024-06-03 20:07:19,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3687, PETRI_PLACES=229, PETRI_TRANSITIONS=288} [2024-06-03 20:07:19,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-03 20:07:19,112 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 288 transitions, 3687 flow [2024-06-03 20:07:19,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:19,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:19,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:19,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:07:19,113 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:19,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1902242030, now seen corresponding path program 3 times [2024-06-03 20:07:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:19,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055708686] [2024-06-03 20:07:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:19,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:19,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055708686] [2024-06-03 20:07:19,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055708686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:19,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:19,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:19,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239864846] [2024-06-03 20:07:19,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:19,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:19,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:19,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:19,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:19,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:19,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 288 transitions, 3687 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:19,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:19,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:19,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:21,008 INFO L124 PetriNetUnfolderBase]: 3052/4689 cut-off events. [2024-06-03 20:07:21,008 INFO L125 PetriNetUnfolderBase]: For 324336/324336 co-relation queries the response was YES. [2024-06-03 20:07:21,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36151 conditions, 4689 events. 3052/4689 cut-off events. For 324336/324336 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24989 event pairs, 657 based on Foata normal form. 4/4691 useless extension candidates. Maximal degree in co-relation 36039. Up to 4445 conditions per place. [2024-06-03 20:07:21,054 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 58 changer transitions 0/313 dead transitions. [2024-06-03 20:07:21,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 4525 flow [2024-06-03 20:07:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:07:21,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-03 20:07:21,056 INFO L175 Difference]: Start difference. First operand has 229 places, 288 transitions, 3687 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:07:21,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 4525 flow [2024-06-03 20:07:21,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 313 transitions, 4387 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 20:07:21,556 INFO L231 Difference]: Finished difference. Result has 233 places, 288 transitions, 3671 flow [2024-06-03 20:07:21,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3549, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3671, PETRI_PLACES=233, PETRI_TRANSITIONS=288} [2024-06-03 20:07:21,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-03 20:07:21,557 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 288 transitions, 3671 flow [2024-06-03 20:07:21,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:21,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:21,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:21,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:07:21,557 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:21,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash -494112555, now seen corresponding path program 3 times [2024-06-03 20:07:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:21,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481540132] [2024-06-03 20:07:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:21,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:22,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:22,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481540132] [2024-06-03 20:07:22,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481540132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:22,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:22,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:07:22,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448237459] [2024-06-03 20:07:22,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:22,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:07:22,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:07:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:07:22,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:22,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 288 transitions, 3671 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:22,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:22,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:22,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:23,277 INFO L124 PetriNetUnfolderBase]: 3054/4695 cut-off events. [2024-06-03 20:07:23,277 INFO L125 PetriNetUnfolderBase]: For 330885/330907 co-relation queries the response was YES. [2024-06-03 20:07:23,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36165 conditions, 4695 events. 3054/4695 cut-off events. For 330885/330907 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25064 event pairs, 677 based on Foata normal form. 18/4709 useless extension candidates. Maximal degree in co-relation 36052. Up to 4494 conditions per place. [2024-06-03 20:07:23,322 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 65 changer transitions 0/313 dead transitions. [2024-06-03 20:07:23,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 313 transitions, 4682 flow [2024-06-03 20:07:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 20:07:23,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-03 20:07:23,324 INFO L175 Difference]: Start difference. First operand has 233 places, 288 transitions, 3671 flow. Second operand 7 states and 116 transitions. [2024-06-03 20:07:23,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 313 transitions, 4682 flow [2024-06-03 20:07:24,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 313 transitions, 4558 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:24,090 INFO L231 Difference]: Finished difference. Result has 234 places, 295 transitions, 3828 flow [2024-06-03 20:07:24,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3828, PETRI_PLACES=234, PETRI_TRANSITIONS=295} [2024-06-03 20:07:24,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-03 20:07:24,091 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 295 transitions, 3828 flow [2024-06-03 20:07:24,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:24,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:24,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:24,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:07:24,092 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:24,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash -493784265, now seen corresponding path program 4 times [2024-06-03 20:07:24,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:24,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4519427] [2024-06-03 20:07:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:24,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:24,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:24,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4519427] [2024-06-03 20:07:24,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4519427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:24,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:24,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:07:24,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961810176] [2024-06-03 20:07:24,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:24,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:07:24,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:24,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:07:24,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:07:24,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:24,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 295 transitions, 3828 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:24,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:24,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:24,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:25,722 INFO L124 PetriNetUnfolderBase]: 3030/4660 cut-off events. [2024-06-03 20:07:25,723 INFO L125 PetriNetUnfolderBase]: For 337360/337360 co-relation queries the response was YES. [2024-06-03 20:07:25,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35915 conditions, 4660 events. 3030/4660 cut-off events. For 337360/337360 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24884 event pairs, 661 based on Foata normal form. 6/4664 useless extension candidates. Maximal degree in co-relation 35800. Up to 4557 conditions per place. [2024-06-03 20:07:25,775 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 270 selfloop transitions, 40 changer transitions 0/313 dead transitions. [2024-06-03 20:07:25,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 313 transitions, 4524 flow [2024-06-03 20:07:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 20:07:25,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 20:07:25,776 INFO L175 Difference]: Start difference. First operand has 234 places, 295 transitions, 3828 flow. Second operand 8 states and 127 transitions. [2024-06-03 20:07:25,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 313 transitions, 4524 flow [2024-06-03 20:07:26,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 313 transitions, 4304 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-03 20:07:26,675 INFO L231 Difference]: Finished difference. Result has 239 places, 295 transitions, 3702 flow [2024-06-03 20:07:26,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3702, PETRI_PLACES=239, PETRI_TRANSITIONS=295} [2024-06-03 20:07:26,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-03 20:07:26,676 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 295 transitions, 3702 flow [2024-06-03 20:07:26,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:26,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:26,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:26,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:07:26,677 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:26,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1069320801, now seen corresponding path program 5 times [2024-06-03 20:07:26,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:26,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945719075] [2024-06-03 20:07:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:26,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:27,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:27,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945719075] [2024-06-03 20:07:27,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945719075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:27,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:27,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:07:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708597984] [2024-06-03 20:07:27,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:07:27,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:07:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:07:27,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:27,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 295 transitions, 3702 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:27,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:27,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:27,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:28,381 INFO L124 PetriNetUnfolderBase]: 3037/4670 cut-off events. [2024-06-03 20:07:28,382 INFO L125 PetriNetUnfolderBase]: For 340435/340435 co-relation queries the response was YES. [2024-06-03 20:07:28,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35852 conditions, 4670 events. 3037/4670 cut-off events. For 340435/340435 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24950 event pairs, 668 based on Foata normal form. 3/4671 useless extension candidates. Maximal degree in co-relation 35736. Up to 4591 conditions per place. [2024-06-03 20:07:28,434 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 33 changer transitions 0/316 dead transitions. [2024-06-03 20:07:28,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 316 transitions, 4462 flow [2024-06-03 20:07:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:07:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:07:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-03 20:07:28,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:07:28,435 INFO L175 Difference]: Start difference. First operand has 239 places, 295 transitions, 3702 flow. Second operand 6 states and 105 transitions. [2024-06-03 20:07:28,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 316 transitions, 4462 flow [2024-06-03 20:07:29,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 316 transitions, 4362 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:29,191 INFO L231 Difference]: Finished difference. Result has 238 places, 298 transitions, 3752 flow [2024-06-03 20:07:29,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3752, PETRI_PLACES=238, PETRI_TRANSITIONS=298} [2024-06-03 20:07:29,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-03 20:07:29,191 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 298 transitions, 3752 flow [2024-06-03 20:07:29,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:29,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:29,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:29,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:07:29,192 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:29,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash -38498571, now seen corresponding path program 6 times [2024-06-03 20:07:29,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:29,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7136619] [2024-06-03 20:07:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:29,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:29,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:29,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7136619] [2024-06-03 20:07:29,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7136619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:29,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:29,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:07:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044112762] [2024-06-03 20:07:29,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:29,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:07:29,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:07:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:07:29,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:29,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 298 transitions, 3752 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:29,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:29,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:29,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:30,774 INFO L124 PetriNetUnfolderBase]: 3013/4637 cut-off events. [2024-06-03 20:07:30,774 INFO L125 PetriNetUnfolderBase]: For 346011/346011 co-relation queries the response was YES. [2024-06-03 20:07:30,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35407 conditions, 4637 events. 3013/4637 cut-off events. For 346011/346011 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24755 event pairs, 665 based on Foata normal form. 6/4641 useless extension candidates. Maximal degree in co-relation 35290. Up to 4444 conditions per place. [2024-06-03 20:07:30,825 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 260 selfloop transitions, 59 changer transitions 0/322 dead transitions. [2024-06-03 20:07:30,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 322 transitions, 4493 flow [2024-06-03 20:07:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:30,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 20:07:30,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-03 20:07:30,826 INFO L175 Difference]: Start difference. First operand has 238 places, 298 transitions, 3752 flow. Second operand 7 states and 125 transitions. [2024-06-03 20:07:30,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 322 transitions, 4493 flow [2024-06-03 20:07:31,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 322 transitions, 4339 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-03 20:07:31,525 INFO L231 Difference]: Finished difference. Result has 242 places, 299 transitions, 3781 flow [2024-06-03 20:07:31,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3781, PETRI_PLACES=242, PETRI_TRANSITIONS=299} [2024-06-03 20:07:31,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-03 20:07:31,526 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 299 transitions, 3781 flow [2024-06-03 20:07:31,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:31,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:31,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:31,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:07:31,527 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:31,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2102794285, now seen corresponding path program 7 times [2024-06-03 20:07:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:31,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681786431] [2024-06-03 20:07:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:32,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:32,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681786431] [2024-06-03 20:07:32,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681786431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:32,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:32,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:32,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304336868] [2024-06-03 20:07:32,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:32,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:32,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:32,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:32,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:32,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:32,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 299 transitions, 3781 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:32,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:32,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:32,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:33,701 INFO L124 PetriNetUnfolderBase]: 2993/4608 cut-off events. [2024-06-03 20:07:33,701 INFO L125 PetriNetUnfolderBase]: For 346253/346273 co-relation queries the response was YES. [2024-06-03 20:07:33,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34905 conditions, 4608 events. 2993/4608 cut-off events. For 346253/346273 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24546 event pairs, 629 based on Foata normal form. 19/4621 useless extension candidates. Maximal degree in co-relation 34786. Up to 4124 conditions per place. [2024-06-03 20:07:33,751 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 58 changer transitions 0/327 dead transitions. [2024-06-03 20:07:33,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 327 transitions, 4465 flow [2024-06-03 20:07:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:07:33,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-03 20:07:33,752 INFO L175 Difference]: Start difference. First operand has 242 places, 299 transitions, 3781 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:07:33,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 327 transitions, 4465 flow [2024-06-03 20:07:34,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 327 transitions, 4333 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:34,489 INFO L231 Difference]: Finished difference. Result has 243 places, 298 transitions, 3687 flow [2024-06-03 20:07:34,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3687, PETRI_PLACES=243, PETRI_TRANSITIONS=298} [2024-06-03 20:07:34,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-03 20:07:34,489 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 298 transitions, 3687 flow [2024-06-03 20:07:34,489 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) [2024-06-03 20:07:34,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:34,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:34,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:07:34,490 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:34,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash -205086924, now seen corresponding path program 4 times [2024-06-03 20:07:34,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:34,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398786250] [2024-06-03 20:07:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:34,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:35,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:35,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398786250] [2024-06-03 20:07:35,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398786250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:35,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:35,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:35,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598605505] [2024-06-03 20:07:35,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:35,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:35,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:35,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:35,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 298 transitions, 3687 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:35,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:35,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:35,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:36,129 INFO L124 PetriNetUnfolderBase]: 3013/4632 cut-off events. [2024-06-03 20:07:36,129 INFO L125 PetriNetUnfolderBase]: For 305861/305861 co-relation queries the response was YES. [2024-06-03 20:07:36,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34333 conditions, 4632 events. 3013/4632 cut-off events. For 305861/305861 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24662 event pairs, 639 based on Foata normal form. 4/4634 useless extension candidates. Maximal degree in co-relation 34215. Up to 4453 conditions per place. [2024-06-03 20:07:36,179 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 275 selfloop transitions, 45 changer transitions 0/323 dead transitions. [2024-06-03 20:07:36,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 323 transitions, 4582 flow [2024-06-03 20:07:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 20:07:36,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:07:36,181 INFO L175 Difference]: Start difference. First operand has 243 places, 298 transitions, 3687 flow. Second operand 7 states and 119 transitions. [2024-06-03 20:07:36,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 323 transitions, 4582 flow [2024-06-03 20:07:36,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 323 transitions, 4372 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 20:07:36,883 INFO L231 Difference]: Finished difference. Result has 242 places, 301 transitions, 3620 flow [2024-06-03 20:07:36,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3477, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3620, PETRI_PLACES=242, PETRI_TRANSITIONS=301} [2024-06-03 20:07:36,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-03 20:07:36,883 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 301 transitions, 3620 flow [2024-06-03 20:07:36,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:36,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:36,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:36,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:07:36,884 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:36,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1069324428, now seen corresponding path program 5 times [2024-06-03 20:07:36,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:36,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176113318] [2024-06-03 20:07:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:36,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176113318] [2024-06-03 20:07:37,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176113318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:37,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:37,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:37,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99577470] [2024-06-03 20:07:37,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:37,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:37,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:37,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:37,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:37,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:37,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 301 transitions, 3620 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:37,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:37,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:37,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:38,536 INFO L124 PetriNetUnfolderBase]: 3001/4618 cut-off events. [2024-06-03 20:07:38,537 INFO L125 PetriNetUnfolderBase]: For 307913/307913 co-relation queries the response was YES. [2024-06-03 20:07:38,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33634 conditions, 4618 events. 3001/4618 cut-off events. For 307913/307913 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24609 event pairs, 640 based on Foata normal form. 4/4620 useless extension candidates. Maximal degree in co-relation 33516. Up to 4445 conditions per place. [2024-06-03 20:07:38,589 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 274 selfloop transitions, 49 changer transitions 0/326 dead transitions. [2024-06-03 20:07:38,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 326 transitions, 4372 flow [2024-06-03 20:07:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:07:38,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:07:38,590 INFO L175 Difference]: Start difference. First operand has 242 places, 301 transitions, 3620 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:07:38,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 326 transitions, 4372 flow [2024-06-03 20:07:39,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 326 transitions, 4195 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:39,176 INFO L231 Difference]: Finished difference. Result has 244 places, 301 transitions, 3547 flow [2024-06-03 20:07:39,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3547, PETRI_PLACES=244, PETRI_TRANSITIONS=301} [2024-06-03 20:07:39,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-03 20:07:39,177 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 301 transitions, 3547 flow [2024-06-03 20:07:39,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:39,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:39,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:39,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:07:39,177 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:39,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash -486486059, now seen corresponding path program 1 times [2024-06-03 20:07:39,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:39,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098688861] [2024-06-03 20:07:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:39,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:40,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:40,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098688861] [2024-06-03 20:07:40,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098688861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:40,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:40,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:40,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161910154] [2024-06-03 20:07:40,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:40,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:40,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:40,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:40,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 301 transitions, 3547 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:40,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:40,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:40,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:41,054 INFO L124 PetriNetUnfolderBase]: 3019/4644 cut-off events. [2024-06-03 20:07:41,054 INFO L125 PetriNetUnfolderBase]: For 314867/314889 co-relation queries the response was YES. [2024-06-03 20:07:41,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33865 conditions, 4644 events. 3019/4644 cut-off events. For 314867/314889 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 24748 event pairs, 657 based on Foata normal form. 18/4658 useless extension candidates. Maximal degree in co-relation 33746. Up to 4408 conditions per place. [2024-06-03 20:07:41,102 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 248 selfloop transitions, 82 changer transitions 0/333 dead transitions. [2024-06-03 20:07:41,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 333 transitions, 4765 flow [2024-06-03 20:07:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:07:41,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:07:41,105 INFO L175 Difference]: Start difference. First operand has 244 places, 301 transitions, 3547 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:07:41,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 333 transitions, 4765 flow [2024-06-03 20:07:41,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 333 transitions, 4626 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:41,866 INFO L231 Difference]: Finished difference. Result has 246 places, 309 transitions, 3704 flow [2024-06-03 20:07:41,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3704, PETRI_PLACES=246, PETRI_TRANSITIONS=309} [2024-06-03 20:07:41,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-03 20:07:41,867 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 309 transitions, 3704 flow [2024-06-03 20:07:41,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:41,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:41,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:41,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:07:41,867 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:41,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash -486395694, now seen corresponding path program 1 times [2024-06-03 20:07:41,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:41,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205984205] [2024-06-03 20:07:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:41,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:42,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:42,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205984205] [2024-06-03 20:07:42,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205984205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:42,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:42,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:42,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760105059] [2024-06-03 20:07:42,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:42,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:42,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:42,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:42,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:42,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 309 transitions, 3704 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:42,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:42,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:42,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:43,593 INFO L124 PetriNetUnfolderBase]: 3079/4727 cut-off events. [2024-06-03 20:07:43,594 INFO L125 PetriNetUnfolderBase]: For 339992/340014 co-relation queries the response was YES. [2024-06-03 20:07:43,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35677 conditions, 4727 events. 3079/4727 cut-off events. For 339992/340014 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25213 event pairs, 646 based on Foata normal form. 20/4743 useless extension candidates. Maximal degree in co-relation 35557. Up to 4330 conditions per place. [2024-06-03 20:07:43,640 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 243 selfloop transitions, 102 changer transitions 0/348 dead transitions. [2024-06-03 20:07:43,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 348 transitions, 5030 flow [2024-06-03 20:07:43,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:43,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:43,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:07:43,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:07:43,642 INFO L175 Difference]: Start difference. First operand has 246 places, 309 transitions, 3704 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:07:43,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 348 transitions, 5030 flow [2024-06-03 20:07:44,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 348 transitions, 4891 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 20:07:44,491 INFO L231 Difference]: Finished difference. Result has 252 places, 326 transitions, 4191 flow [2024-06-03 20:07:44,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4191, PETRI_PLACES=252, PETRI_TRANSITIONS=326} [2024-06-03 20:07:44,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-03 20:07:44,492 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 326 transitions, 4191 flow [2024-06-03 20:07:44,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:44,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:44,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:44,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:07:44,492 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:44,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash 481037117, now seen corresponding path program 2 times [2024-06-03 20:07:44,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:44,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876384042] [2024-06-03 20:07:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:44,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:45,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:45,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876384042] [2024-06-03 20:07:45,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876384042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:45,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:45,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:45,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119258226] [2024-06-03 20:07:45,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:45,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:45,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:45,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 326 transitions, 4191 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:45,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:45,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:45,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:46,549 INFO L124 PetriNetUnfolderBase]: 3295/5025 cut-off events. [2024-06-03 20:07:46,549 INFO L125 PetriNetUnfolderBase]: For 405600/405600 co-relation queries the response was YES. [2024-06-03 20:07:46,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40199 conditions, 5025 events. 3295/5025 cut-off events. For 405600/405600 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26860 event pairs, 643 based on Foata normal form. 12/5035 useless extension candidates. Maximal degree in co-relation 40075. Up to 4737 conditions per place. [2024-06-03 20:07:46,600 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 310 selfloop transitions, 61 changer transitions 0/374 dead transitions. [2024-06-03 20:07:46,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 374 transitions, 5795 flow [2024-06-03 20:07:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:07:46,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:07:46,602 INFO L175 Difference]: Start difference. First operand has 252 places, 326 transitions, 4191 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:07:46,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 374 transitions, 5795 flow [2024-06-03 20:07:47,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 374 transitions, 5628 flow, removed 80 selfloop flow, removed 2 redundant places. [2024-06-03 20:07:47,441 INFO L231 Difference]: Finished difference. Result has 259 places, 348 transitions, 4563 flow [2024-06-03 20:07:47,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4563, PETRI_PLACES=259, PETRI_TRANSITIONS=348} [2024-06-03 20:07:47,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-03 20:07:47,442 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 348 transitions, 4563 flow [2024-06-03 20:07:47,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:47,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:47,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:47,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:07:47,443 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:47,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash -482676624, now seen corresponding path program 2 times [2024-06-03 20:07:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:47,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508058763] [2024-06-03 20:07:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:47,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:48,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:48,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508058763] [2024-06-03 20:07:48,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508058763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:48,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:48,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:48,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114258953] [2024-06-03 20:07:48,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:48,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:48,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:48,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:48,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 348 transitions, 4563 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:48,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:48,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:48,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:49,473 INFO L124 PetriNetUnfolderBase]: 3363/5119 cut-off events. [2024-06-03 20:07:49,474 INFO L125 PetriNetUnfolderBase]: For 415079/415079 co-relation queries the response was YES. [2024-06-03 20:07:49,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41737 conditions, 5119 events. 3363/5119 cut-off events. For 415079/415079 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27359 event pairs, 668 based on Foata normal form. 4/5121 useless extension candidates. Maximal degree in co-relation 41610. Up to 4969 conditions per place. [2024-06-03 20:07:49,530 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 327 selfloop transitions, 51 changer transitions 0/381 dead transitions. [2024-06-03 20:07:49,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 5920 flow [2024-06-03 20:07:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 20:07:49,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-03 20:07:49,532 INFO L175 Difference]: Start difference. First operand has 259 places, 348 transitions, 4563 flow. Second operand 9 states and 141 transitions. [2024-06-03 20:07:49,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 5920 flow [2024-06-03 20:07:50,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 381 transitions, 5752 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-03 20:07:50,562 INFO L231 Difference]: Finished difference. Result has 266 places, 359 transitions, 4791 flow [2024-06-03 20:07:50,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4395, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4791, PETRI_PLACES=266, PETRI_TRANSITIONS=359} [2024-06-03 20:07:50,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-03 20:07:50,563 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 359 transitions, 4791 flow [2024-06-03 20:07:50,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:50,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:50,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:50,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:07:50,564 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:50,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:50,564 INFO L85 PathProgramCache]: Analyzing trace with hash -38490480, now seen corresponding path program 3 times [2024-06-03 20:07:50,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:50,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17322958] [2024-06-03 20:07:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:50,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:51,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:51,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17322958] [2024-06-03 20:07:51,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17322958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:51,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:51,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:51,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503856586] [2024-06-03 20:07:51,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:51,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:51,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:51,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 359 transitions, 4791 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:51,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:51,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:51,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:52,386 INFO L124 PetriNetUnfolderBase]: 3431/5213 cut-off events. [2024-06-03 20:07:52,386 INFO L125 PetriNetUnfolderBase]: For 439182/439182 co-relation queries the response was YES. [2024-06-03 20:07:52,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43090 conditions, 5213 events. 3431/5213 cut-off events. For 439182/439182 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27859 event pairs, 710 based on Foata normal form. 4/5215 useless extension candidates. Maximal degree in co-relation 42960. Up to 4939 conditions per place. [2024-06-03 20:07:52,452 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 319 selfloop transitions, 76 changer transitions 0/398 dead transitions. [2024-06-03 20:07:52,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 398 transitions, 6233 flow [2024-06-03 20:07:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:07:52,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-03 20:07:52,453 INFO L175 Difference]: Start difference. First operand has 266 places, 359 transitions, 4791 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:07:52,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 398 transitions, 6233 flow [2024-06-03 20:07:53,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 398 transitions, 6095 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-03 20:07:53,623 INFO L231 Difference]: Finished difference. Result has 272 places, 371 transitions, 5177 flow [2024-06-03 20:07:53,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4653, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5177, PETRI_PLACES=272, PETRI_TRANSITIONS=371} [2024-06-03 20:07:53,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-03 20:07:53,624 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 371 transitions, 5177 flow [2024-06-03 20:07:53,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:53,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:53,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:53,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:07:53,625 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:53,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:53,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1063598945, now seen corresponding path program 3 times [2024-06-03 20:07:53,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:53,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390087210] [2024-06-03 20:07:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:53,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:54,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:54,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390087210] [2024-06-03 20:07:54,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390087210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:54,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:54,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:54,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586445277] [2024-06-03 20:07:54,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:54,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:54,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 371 transitions, 5177 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:54,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:54,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:54,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:55,721 INFO L124 PetriNetUnfolderBase]: 3667/5540 cut-off events. [2024-06-03 20:07:55,721 INFO L125 PetriNetUnfolderBase]: For 509313/509313 co-relation queries the response was YES. [2024-06-03 20:07:55,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47336 conditions, 5540 events. 3667/5540 cut-off events. For 509313/509313 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29756 event pairs, 692 based on Foata normal form. 12/5550 useless extension candidates. Maximal degree in co-relation 47202. Up to 4752 conditions per place. [2024-06-03 20:07:55,790 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 296 selfloop transitions, 128 changer transitions 0/427 dead transitions. [2024-06-03 20:07:55,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 427 transitions, 6823 flow [2024-06-03 20:07:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 20:07:55,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-03 20:07:55,791 INFO L175 Difference]: Start difference. First operand has 272 places, 371 transitions, 5177 flow. Second operand 8 states and 154 transitions. [2024-06-03 20:07:55,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 427 transitions, 6823 flow [2024-06-03 20:07:57,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 427 transitions, 6707 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-03 20:07:57,014 INFO L231 Difference]: Finished difference. Result has 279 places, 390 transitions, 5760 flow [2024-06-03 20:07:57,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5760, PETRI_PLACES=279, PETRI_TRANSITIONS=390} [2024-06-03 20:07:57,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-03 20:07:57,015 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 390 transitions, 5760 flow [2024-06-03 20:07:57,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:57,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:57,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:57,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:07:57,016 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:57,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:57,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1055974433, now seen corresponding path program 1 times [2024-06-03 20:07:57,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:57,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022444037] [2024-06-03 20:07:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:57,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:57,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:57,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022444037] [2024-06-03 20:07:57,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022444037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:57,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:57,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:57,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364549647] [2024-06-03 20:07:57,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:57,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:57,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:57,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:58,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:58,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 390 transitions, 5760 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:07:58,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:58,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:58,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:59,115 INFO L124 PetriNetUnfolderBase]: 3664/5537 cut-off events. [2024-06-03 20:07:59,115 INFO L125 PetriNetUnfolderBase]: For 507776/507776 co-relation queries the response was YES. [2024-06-03 20:07:59,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49072 conditions, 5537 events. 3664/5537 cut-off events. For 507776/507776 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29744 event pairs, 737 based on Foata normal form. 1/5536 useless extension candidates. Maximal degree in co-relation 48935. Up to 5472 conditions per place. [2024-06-03 20:07:59,187 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 370 selfloop transitions, 29 changer transitions 0/402 dead transitions. [2024-06-03 20:07:59,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 402 transitions, 6612 flow [2024-06-03 20:07:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:07:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:07:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-03 20:07:59,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-03 20:07:59,189 INFO L175 Difference]: Start difference. First operand has 279 places, 390 transitions, 5760 flow. Second operand 5 states and 86 transitions. [2024-06-03 20:07:59,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 402 transitions, 6612 flow [2024-06-03 20:08:00,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 402 transitions, 6419 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-03 20:08:00,764 INFO L231 Difference]: Finished difference. Result has 281 places, 390 transitions, 5649 flow [2024-06-03 20:08:00,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5649, PETRI_PLACES=281, PETRI_TRANSITIONS=390} [2024-06-03 20:08:00,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-03 20:08:00,764 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 390 transitions, 5649 flow [2024-06-03 20:08:00,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:00,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:00,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:00,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:08:00,765 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:00,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1063593210, now seen corresponding path program 4 times [2024-06-03 20:08:00,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:00,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635714729] [2024-06-03 20:08:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:00,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:01,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:01,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635714729] [2024-06-03 20:08:01,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635714729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:01,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:01,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:01,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379001994] [2024-06-03 20:08:01,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:01,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:01,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:01,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:01,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:01,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:01,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 390 transitions, 5649 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:01,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:01,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:01,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:02,761 INFO L124 PetriNetUnfolderBase]: 3704/5593 cut-off events. [2024-06-03 20:08:02,761 INFO L125 PetriNetUnfolderBase]: For 531031/531031 co-relation queries the response was YES. [2024-06-03 20:08:02,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49697 conditions, 5593 events. 3704/5593 cut-off events. For 531031/531031 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30071 event pairs, 735 based on Foata normal form. 4/5595 useless extension candidates. Maximal degree in co-relation 49558. Up to 5461 conditions per place. [2024-06-03 20:08:02,834 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 371 selfloop transitions, 42 changer transitions 0/416 dead transitions. [2024-06-03 20:08:02,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 416 transitions, 6867 flow [2024-06-03 20:08:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 20:08:02,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:08:02,835 INFO L175 Difference]: Start difference. First operand has 281 places, 390 transitions, 5649 flow. Second operand 8 states and 124 transitions. [2024-06-03 20:08:02,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 416 transitions, 6867 flow [2024-06-03 20:08:04,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 416 transitions, 6809 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:08:04,303 INFO L231 Difference]: Finished difference. Result has 286 places, 397 transitions, 5889 flow [2024-06-03 20:08:04,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5889, PETRI_PLACES=286, PETRI_TRANSITIONS=397} [2024-06-03 20:08:04,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-03 20:08:04,304 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 397 transitions, 5889 flow [2024-06-03 20:08:04,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:04,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:04,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:04,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:08:04,305 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:04,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:04,305 INFO L85 PathProgramCache]: Analyzing trace with hash 867430913, now seen corresponding path program 1 times [2024-06-03 20:08:04,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:04,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533594494] [2024-06-03 20:08:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:04,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:04,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:04,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533594494] [2024-06-03 20:08:04,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533594494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:04,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:04,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:04,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346037023] [2024-06-03 20:08:04,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:04,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:04,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:04,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:04,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:05,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:05,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 397 transitions, 5889 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:05,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:05,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:05,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:06,275 INFO L124 PetriNetUnfolderBase]: 3746/5650 cut-off events. [2024-06-03 20:08:06,275 INFO L125 PetriNetUnfolderBase]: For 552860/552860 co-relation queries the response was YES. [2024-06-03 20:08:06,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50854 conditions, 5650 events. 3746/5650 cut-off events. For 552860/552860 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30411 event pairs, 757 based on Foata normal form. 2/5650 useless extension candidates. Maximal degree in co-relation 50713. Up to 5456 conditions per place. [2024-06-03 20:08:06,350 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 56 changer transitions 0/440 dead transitions. [2024-06-03 20:08:06,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 440 transitions, 7212 flow [2024-06-03 20:08:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:08:06,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:08:06,352 INFO L175 Difference]: Start difference. First operand has 286 places, 397 transitions, 5889 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:08:06,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 440 transitions, 7212 flow [2024-06-03 20:08:08,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 440 transitions, 6973 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:08,090 INFO L231 Difference]: Finished difference. Result has 290 places, 413 transitions, 6024 flow [2024-06-03 20:08:08,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6024, PETRI_PLACES=290, PETRI_TRANSITIONS=413} [2024-06-03 20:08:08,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-03 20:08:08,091 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 413 transitions, 6024 flow [2024-06-03 20:08:08,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:08,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:08,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:08,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:08:08,091 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:08,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:08,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1156801791, now seen corresponding path program 2 times [2024-06-03 20:08:08,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:08,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337149092] [2024-06-03 20:08:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:08,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:08,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:08,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337149092] [2024-06-03 20:08:08,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337149092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:08,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:08,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:08,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084607314] [2024-06-03 20:08:08,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:08,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:08,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:08,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:08,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:08,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:08,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 413 transitions, 6024 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:08,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:08,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:08,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:10,101 INFO L124 PetriNetUnfolderBase]: 3756/5665 cut-off events. [2024-06-03 20:08:10,101 INFO L125 PetriNetUnfolderBase]: For 569970/569970 co-relation queries the response was YES. [2024-06-03 20:08:10,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51487 conditions, 5665 events. 3756/5665 cut-off events. For 569970/569970 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30455 event pairs, 783 based on Foata normal form. 2/5665 useless extension candidates. Maximal degree in co-relation 51346. Up to 5532 conditions per place. [2024-06-03 20:08:10,172 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 47 changer transitions 0/439 dead transitions. [2024-06-03 20:08:10,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 439 transitions, 7052 flow [2024-06-03 20:08:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 20:08:10,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 20:08:10,174 INFO L175 Difference]: Start difference. First operand has 290 places, 413 transitions, 6024 flow. Second operand 8 states and 127 transitions. [2024-06-03 20:08:10,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 439 transitions, 7052 flow [2024-06-03 20:08:11,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 439 transitions, 6940 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-03 20:08:11,945 INFO L231 Difference]: Finished difference. Result has 296 places, 417 transitions, 6090 flow [2024-06-03 20:08:11,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6090, PETRI_PLACES=296, PETRI_TRANSITIONS=417} [2024-06-03 20:08:11,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-03 20:08:11,945 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 417 transitions, 6090 flow [2024-06-03 20:08:11,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:11,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:11,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:11,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:08:11,946 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:11,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:11,946 INFO L85 PathProgramCache]: Analyzing trace with hash 864570977, now seen corresponding path program 1 times [2024-06-03 20:08:11,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:11,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595798237] [2024-06-03 20:08:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:11,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:12,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:12,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595798237] [2024-06-03 20:08:12,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595798237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:12,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:12,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942491322] [2024-06-03 20:08:12,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:12,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:12,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:12,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:12,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:12,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 417 transitions, 6090 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:12,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:12,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:12,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:14,271 INFO L124 PetriNetUnfolderBase]: 3764/5678 cut-off events. [2024-06-03 20:08:14,271 INFO L125 PetriNetUnfolderBase]: For 585391/585391 co-relation queries the response was YES. [2024-06-03 20:08:14,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51467 conditions, 5678 events. 3764/5678 cut-off events. For 585391/585391 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30529 event pairs, 663 based on Foata normal form. 2/5678 useless extension candidates. Maximal degree in co-relation 51324. Up to 5493 conditions per place. [2024-06-03 20:08:14,339 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 401 selfloop transitions, 44 changer transitions 0/448 dead transitions. [2024-06-03 20:08:14,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 448 transitions, 7292 flow [2024-06-03 20:08:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 20:08:14,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 20:08:14,341 INFO L175 Difference]: Start difference. First operand has 296 places, 417 transitions, 6090 flow. Second operand 8 states and 131 transitions. [2024-06-03 20:08:14,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 448 transitions, 7292 flow [2024-06-03 20:08:15,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 448 transitions, 7182 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:08:15,997 INFO L231 Difference]: Finished difference. Result has 300 places, 421 transitions, 6153 flow [2024-06-03 20:08:15,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5980, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6153, PETRI_PLACES=300, PETRI_TRANSITIONS=421} [2024-06-03 20:08:15,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-03 20:08:15,998 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 421 transitions, 6153 flow [2024-06-03 20:08:15,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:15,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:15,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:15,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:08:15,999 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:15,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:15,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1165136637, now seen corresponding path program 2 times [2024-06-03 20:08:15,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:15,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810711424] [2024-06-03 20:08:15,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:16,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:16,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:16,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810711424] [2024-06-03 20:08:16,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810711424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:16,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:16,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:16,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452879541] [2024-06-03 20:08:16,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:16,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:16,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:16,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:16,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:16,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 421 transitions, 6153 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:16,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:16,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:16,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:18,382 INFO L124 PetriNetUnfolderBase]: 3772/5690 cut-off events. [2024-06-03 20:08:18,382 INFO L125 PetriNetUnfolderBase]: For 601545/601545 co-relation queries the response was YES. [2024-06-03 20:08:18,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51878 conditions, 5690 events. 3772/5690 cut-off events. For 601545/601545 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 30689 event pairs, 781 based on Foata normal form. 2/5690 useless extension candidates. Maximal degree in co-relation 51733. Up to 5556 conditions per place. [2024-06-03 20:08:18,454 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 398 selfloop transitions, 44 changer transitions 0/445 dead transitions. [2024-06-03 20:08:18,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 445 transitions, 7159 flow [2024-06-03 20:08:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 20:08:18,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 20:08:18,456 INFO L175 Difference]: Start difference. First operand has 300 places, 421 transitions, 6153 flow. Second operand 8 states and 127 transitions. [2024-06-03 20:08:18,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 445 transitions, 7159 flow [2024-06-03 20:08:20,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 445 transitions, 7036 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-03 20:08:20,339 INFO L231 Difference]: Finished difference. Result has 304 places, 423 transitions, 6169 flow [2024-06-03 20:08:20,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6169, PETRI_PLACES=304, PETRI_TRANSITIONS=423} [2024-06-03 20:08:20,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-03 20:08:20,340 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 423 transitions, 6169 flow [2024-06-03 20:08:20,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:20,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:20,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:20,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:08:20,340 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:20,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:20,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1047224541, now seen corresponding path program 3 times [2024-06-03 20:08:20,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:20,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865531260] [2024-06-03 20:08:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:20,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:20,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:20,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865531260] [2024-06-03 20:08:20,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865531260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:20,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:20,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:20,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673141083] [2024-06-03 20:08:20,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:20,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:20,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:21,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:21,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 423 transitions, 6169 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:21,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:21,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:21,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:22,357 INFO L124 PetriNetUnfolderBase]: 3830/5768 cut-off events. [2024-06-03 20:08:22,357 INFO L125 PetriNetUnfolderBase]: For 632732/632732 co-relation queries the response was YES. [2024-06-03 20:08:22,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53169 conditions, 5768 events. 3830/5768 cut-off events. For 632732/632732 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31093 event pairs, 765 based on Foata normal form. 2/5768 useless extension candidates. Maximal degree in co-relation 53022. Up to 5458 conditions per place. [2024-06-03 20:08:22,431 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 85 changer transitions 0/465 dead transitions. [2024-06-03 20:08:22,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 465 transitions, 7775 flow [2024-06-03 20:08:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:08:22,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 20:08:22,433 INFO L175 Difference]: Start difference. First operand has 304 places, 423 transitions, 6169 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:08:22,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 465 transitions, 7775 flow [2024-06-03 20:08:24,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 465 transitions, 7678 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:24,175 INFO L231 Difference]: Finished difference. Result has 306 places, 438 transitions, 6550 flow [2024-06-03 20:08:24,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6072, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6550, PETRI_PLACES=306, PETRI_TRANSITIONS=438} [2024-06-03 20:08:24,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-03 20:08:24,176 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 438 transitions, 6550 flow [2024-06-03 20:08:24,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:24,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:24,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:24,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:08:24,177 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:24,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1046925825, now seen corresponding path program 1 times [2024-06-03 20:08:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:24,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493405625] [2024-06-03 20:08:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:24,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:24,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493405625] [2024-06-03 20:08:24,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493405625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:24,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:24,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:24,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076513562] [2024-06-03 20:08:24,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:24,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:24,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:24,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:24,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:24,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:24,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 438 transitions, 6550 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:24,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:24,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:24,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:26,342 INFO L124 PetriNetUnfolderBase]: 3835/5776 cut-off events. [2024-06-03 20:08:26,342 INFO L125 PetriNetUnfolderBase]: For 649884/649884 co-relation queries the response was YES. [2024-06-03 20:08:26,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54000 conditions, 5776 events. 3835/5776 cut-off events. For 649884/649884 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31177 event pairs, 796 based on Foata normal form. 1/5775 useless extension candidates. Maximal degree in co-relation 53852. Up to 5693 conditions per place. [2024-06-03 20:08:26,414 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 422 selfloop transitions, 35 changer transitions 0/460 dead transitions. [2024-06-03 20:08:26,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 460 transitions, 7606 flow [2024-06-03 20:08:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-03 20:08:26,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-03 20:08:26,415 INFO L175 Difference]: Start difference. First operand has 306 places, 438 transitions, 6550 flow. Second operand 8 states and 122 transitions. [2024-06-03 20:08:26,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 460 transitions, 7606 flow [2024-06-03 20:08:28,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 460 transitions, 7431 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-03 20:08:28,563 INFO L231 Difference]: Finished difference. Result has 311 places, 441 transitions, 6527 flow [2024-06-03 20:08:28,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6527, PETRI_PLACES=311, PETRI_TRANSITIONS=441} [2024-06-03 20:08:28,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-03 20:08:28,563 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 441 transitions, 6527 flow [2024-06-03 20:08:28,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:28,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:28,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:28,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:08:28,565 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:28,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1046926011, now seen corresponding path program 4 times [2024-06-03 20:08:28,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:28,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5653988] [2024-06-03 20:08:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:28,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:29,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:29,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5653988] [2024-06-03 20:08:29,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5653988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:29,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:29,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:29,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498032832] [2024-06-03 20:08:29,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:29,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:29,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:29,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:29,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:29,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:29,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 441 transitions, 6527 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:29,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:29,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:29,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:30,727 INFO L124 PetriNetUnfolderBase]: 3853/5800 cut-off events. [2024-06-03 20:08:30,727 INFO L125 PetriNetUnfolderBase]: For 667978/667978 co-relation queries the response was YES. [2024-06-03 20:08:30,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53980 conditions, 5800 events. 3853/5800 cut-off events. For 667978/667978 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 31284 event pairs, 761 based on Foata normal form. 2/5800 useless extension candidates. Maximal degree in co-relation 53830. Up to 5484 conditions per place. [2024-06-03 20:08:30,809 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 93 changer transitions 0/471 dead transitions. [2024-06-03 20:08:30,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 471 transitions, 7937 flow [2024-06-03 20:08:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 20:08:30,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 20:08:30,810 INFO L175 Difference]: Start difference. First operand has 311 places, 441 transitions, 6527 flow. Second operand 8 states and 131 transitions. [2024-06-03 20:08:30,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 471 transitions, 7937 flow [2024-06-03 20:08:32,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 471 transitions, 7845 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:08:32,834 INFO L231 Difference]: Finished difference. Result has 314 places, 447 transitions, 6715 flow [2024-06-03 20:08:32,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6715, PETRI_PLACES=314, PETRI_TRANSITIONS=447} [2024-06-03 20:08:32,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-03 20:08:32,835 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 447 transitions, 6715 flow [2024-06-03 20:08:32,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:32,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:32,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:32,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:08:32,836 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:32,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:32,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1046925639, now seen corresponding path program 1 times [2024-06-03 20:08:32,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:32,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665209894] [2024-06-03 20:08:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:32,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:33,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:33,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665209894] [2024-06-03 20:08:33,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665209894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:33,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:33,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:33,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460942096] [2024-06-03 20:08:33,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:33,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:33,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:33,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:33,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 447 transitions, 6715 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:33,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:33,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:33,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:34,885 INFO L124 PetriNetUnfolderBase]: 3895/5859 cut-off events. [2024-06-03 20:08:34,885 INFO L125 PetriNetUnfolderBase]: For 700717/700717 co-relation queries the response was YES. [2024-06-03 20:08:34,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55404 conditions, 5859 events. 3895/5859 cut-off events. For 700717/700717 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31604 event pairs, 786 based on Foata normal form. 2/5859 useless extension candidates. Maximal degree in co-relation 55253. Up to 5733 conditions per place. [2024-06-03 20:08:34,964 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 424 selfloop transitions, 51 changer transitions 0/478 dead transitions. [2024-06-03 20:08:34,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 478 transitions, 8141 flow [2024-06-03 20:08:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:08:34,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:08:34,965 INFO L175 Difference]: Start difference. First operand has 314 places, 447 transitions, 6715 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:08:34,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 478 transitions, 8141 flow [2024-06-03 20:08:37,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 478 transitions, 7998 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 20:08:37,586 INFO L231 Difference]: Finished difference. Result has 319 places, 456 transitions, 6956 flow [2024-06-03 20:08:37,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6572, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6956, PETRI_PLACES=319, PETRI_TRANSITIONS=456} [2024-06-03 20:08:37,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-03 20:08:37,587 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 456 transitions, 6956 flow [2024-06-03 20:08:37,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:37,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:37,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:37,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:08:37,587 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:37,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash -869794305, now seen corresponding path program 2 times [2024-06-03 20:08:37,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:37,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758828258] [2024-06-03 20:08:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:37,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:38,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:38,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758828258] [2024-06-03 20:08:38,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758828258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:38,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:38,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:38,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49476862] [2024-06-03 20:08:38,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:38,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:38,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:38,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:38,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 456 transitions, 6956 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:38,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:38,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:38,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:39,646 INFO L124 PetriNetUnfolderBase]: 3900/5866 cut-off events. [2024-06-03 20:08:39,646 INFO L125 PetriNetUnfolderBase]: For 716214/716214 co-relation queries the response was YES. [2024-06-03 20:08:39,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55687 conditions, 5866 events. 3900/5866 cut-off events. For 716214/716214 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31657 event pairs, 787 based on Foata normal form. 1/5865 useless extension candidates. Maximal degree in co-relation 55534. Up to 5809 conditions per place. [2024-06-03 20:08:39,726 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 447 selfloop transitions, 25 changer transitions 0/475 dead transitions. [2024-06-03 20:08:39,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 475 transitions, 8034 flow [2024-06-03 20:08:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 20:08:39,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-03 20:08:39,727 INFO L175 Difference]: Start difference. First operand has 319 places, 456 transitions, 6956 flow. Second operand 8 states and 118 transitions. [2024-06-03 20:08:39,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 475 transitions, 8034 flow [2024-06-03 20:08:42,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 475 transitions, 7905 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-03 20:08:42,311 INFO L231 Difference]: Finished difference. Result has 323 places, 459 transitions, 6965 flow [2024-06-03 20:08:42,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6965, PETRI_PLACES=323, PETRI_TRANSITIONS=459} [2024-06-03 20:08:42,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-03 20:08:42,311 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 459 transitions, 6965 flow [2024-06-03 20:08:42,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:42,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:42,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:42,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:08:42,312 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:42,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2123247089, now seen corresponding path program 5 times [2024-06-03 20:08:42,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:42,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162008486] [2024-06-03 20:08:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:42,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:42,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162008486] [2024-06-03 20:08:42,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162008486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:42,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:42,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:42,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344925521] [2024-06-03 20:08:42,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:42,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:42,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:42,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:42,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:43,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:43,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 459 transitions, 6965 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:43,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:43,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:43,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:44,277 INFO L124 PetriNetUnfolderBase]: 3894/5857 cut-off events. [2024-06-03 20:08:44,278 INFO L125 PetriNetUnfolderBase]: For 728270/728270 co-relation queries the response was YES. [2024-06-03 20:08:44,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55628 conditions, 5857 events. 3894/5857 cut-off events. For 728270/728270 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31580 event pairs, 778 based on Foata normal form. 2/5857 useless extension candidates. Maximal degree in co-relation 55474. Up to 5701 conditions per place. [2024-06-03 20:08:44,361 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 421 selfloop transitions, 55 changer transitions 0/479 dead transitions. [2024-06-03 20:08:44,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 479 transitions, 8150 flow [2024-06-03 20:08:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:08:44,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:08:44,363 INFO L175 Difference]: Start difference. First operand has 323 places, 459 transitions, 6965 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:08:44,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 479 transitions, 8150 flow [2024-06-03 20:08:46,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 479 transitions, 8056 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:46,628 INFO L231 Difference]: Finished difference. Result has 325 places, 459 transitions, 6987 flow [2024-06-03 20:08:46,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6871, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6987, PETRI_PLACES=325, PETRI_TRANSITIONS=459} [2024-06-03 20:08:46,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-03 20:08:46,629 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 459 transitions, 6987 flow [2024-06-03 20:08:46,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:46,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:46,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:46,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:08:46,629 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:46,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:46,630 INFO L85 PathProgramCache]: Analyzing trace with hash -869914461, now seen corresponding path program 6 times [2024-06-03 20:08:46,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:46,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536580192] [2024-06-03 20:08:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:46,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:47,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:47,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536580192] [2024-06-03 20:08:47,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536580192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:47,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:47,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:47,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992142430] [2024-06-03 20:08:47,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:47,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:47,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:47,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:47,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:47,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 459 transitions, 6987 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:47,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:47,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:47,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:48,644 INFO L124 PetriNetUnfolderBase]: 3888/5849 cut-off events. [2024-06-03 20:08:48,644 INFO L125 PetriNetUnfolderBase]: For 740322/740322 co-relation queries the response was YES. [2024-06-03 20:08:48,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55700 conditions, 5849 events. 3888/5849 cut-off events. For 740322/740322 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31547 event pairs, 777 based on Foata normal form. 2/5849 useless extension candidates. Maximal degree in co-relation 55545. Up to 5717 conditions per place. [2024-06-03 20:08:48,723 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 45 changer transitions 0/477 dead transitions. [2024-06-03 20:08:48,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 477 transitions, 8008 flow [2024-06-03 20:08:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 20:08:48,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:08:48,724 INFO L175 Difference]: Start difference. First operand has 325 places, 459 transitions, 6987 flow. Second operand 8 states and 123 transitions. [2024-06-03 20:08:48,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 477 transitions, 8008 flow [2024-06-03 20:08:51,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 477 transitions, 7869 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 20:08:51,088 INFO L231 Difference]: Finished difference. Result has 329 places, 460 transitions, 6959 flow [2024-06-03 20:08:51,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6959, PETRI_PLACES=329, PETRI_TRANSITIONS=460} [2024-06-03 20:08:51,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-03 20:08:51,089 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 460 transitions, 6959 flow [2024-06-03 20:08:51,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:51,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:51,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:51,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:08:51,089 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:51,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:51,090 INFO L85 PathProgramCache]: Analyzing trace with hash -869794119, now seen corresponding path program 2 times [2024-06-03 20:08:51,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:51,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006346577] [2024-06-03 20:08:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:51,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006346577] [2024-06-03 20:08:51,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006346577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:51,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:51,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:51,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116555120] [2024-06-03 20:08:51,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:51,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:51,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:51,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:51,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:51,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 460 transitions, 6959 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:51,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:51,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:51,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:53,276 INFO L124 PetriNetUnfolderBase]: 3898/5864 cut-off events. [2024-06-03 20:08:53,276 INFO L125 PetriNetUnfolderBase]: For 757210/757210 co-relation queries the response was YES. [2024-06-03 20:08:53,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56017 conditions, 5864 events. 3898/5864 cut-off events. For 757210/757210 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31629 event pairs, 787 based on Foata normal form. 2/5864 useless extension candidates. Maximal degree in co-relation 55860. Up to 5783 conditions per place. [2024-06-03 20:08:53,349 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 442 selfloop transitions, 37 changer transitions 0/482 dead transitions. [2024-06-03 20:08:53,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 482 transitions, 8223 flow [2024-06-03 20:08:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 20:08:53,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-03 20:08:53,350 INFO L175 Difference]: Start difference. First operand has 329 places, 460 transitions, 6959 flow. Second operand 8 states and 125 transitions. [2024-06-03 20:08:53,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 482 transitions, 8223 flow [2024-06-03 20:08:55,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 482 transitions, 8135 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:08:55,742 INFO L231 Difference]: Finished difference. Result has 333 places, 463 transitions, 7025 flow [2024-06-03 20:08:55,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6871, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7025, PETRI_PLACES=333, PETRI_TRANSITIONS=463} [2024-06-03 20:08:55,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-03 20:08:55,742 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 463 transitions, 7025 flow [2024-06-03 20:08:55,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:55,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:55,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:55,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:08:55,743 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:55,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:55,743 INFO L85 PathProgramCache]: Analyzing trace with hash -675657429, now seen corresponding path program 3 times [2024-06-03 20:08:55,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:55,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513105919] [2024-06-03 20:08:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:55,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:56,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:56,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513105919] [2024-06-03 20:08:56,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513105919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:56,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:56,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:08:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721615627] [2024-06-03 20:08:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:56,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:08:56,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:56,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:08:56,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:08:56,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:56,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 463 transitions, 7025 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:08:56,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:56,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:56,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:57,890 INFO L124 PetriNetUnfolderBase]: 3892/5856 cut-off events. [2024-06-03 20:08:57,891 INFO L125 PetriNetUnfolderBase]: For 769061/769061 co-relation queries the response was YES. [2024-06-03 20:08:57,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55974 conditions, 5856 events. 3892/5856 cut-off events. For 769061/769061 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31545 event pairs, 797 based on Foata normal form. 2/5856 useless extension candidates. Maximal degree in co-relation 55816. Up to 5787 conditions per place. [2024-06-03 20:08:57,975 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 445 selfloop transitions, 32 changer transitions 0/480 dead transitions. [2024-06-03 20:08:57,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 480 transitions, 8045 flow [2024-06-03 20:08:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 20:08:57,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-03 20:08:57,977 INFO L175 Difference]: Start difference. First operand has 333 places, 463 transitions, 7025 flow. Second operand 8 states and 121 transitions. [2024-06-03 20:08:57,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 480 transitions, 8045 flow [2024-06-03 20:09:00,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 480 transitions, 7855 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:00,827 INFO L231 Difference]: Finished difference. Result has 335 places, 463 transitions, 6905 flow [2024-06-03 20:09:00,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6835, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6905, PETRI_PLACES=335, PETRI_TRANSITIONS=463} [2024-06-03 20:09:00,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-03 20:09:00,828 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 463 transitions, 6905 flow [2024-06-03 20:09:00,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:00,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:00,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:00,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:09:00,829 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:00,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:00,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1160398583, now seen corresponding path program 1 times [2024-06-03 20:09:00,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:00,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615356049] [2024-06-03 20:09:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:00,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:01,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:01,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615356049] [2024-06-03 20:09:01,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615356049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:01,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:01,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36932941] [2024-06-03 20:09:01,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:01,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:02,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:02,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 463 transitions, 6905 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:02,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:02,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:02,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:03,551 INFO L124 PetriNetUnfolderBase]: 3900/5868 cut-off events. [2024-06-03 20:09:03,551 INFO L125 PetriNetUnfolderBase]: For 787866/787866 co-relation queries the response was YES. [2024-06-03 20:09:03,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56109 conditions, 5868 events. 3900/5868 cut-off events. For 787866/787866 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31628 event pairs, 786 based on Foata normal form. 2/5868 useless extension candidates. Maximal degree in co-relation 55951. Up to 5785 conditions per place. [2024-06-03 20:09:03,634 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 440 selfloop transitions, 39 changer transitions 0/482 dead transitions. [2024-06-03 20:09:03,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 482 transitions, 7977 flow [2024-06-03 20:09:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 20:09:03,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:09:03,636 INFO L175 Difference]: Start difference. First operand has 335 places, 463 transitions, 6905 flow. Second operand 8 states and 123 transitions. [2024-06-03 20:09:03,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 482 transitions, 7977 flow [2024-06-03 20:09:06,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 482 transitions, 7900 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:06,679 INFO L231 Difference]: Finished difference. Result has 336 places, 465 transitions, 6969 flow [2024-06-03 20:09:06,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6969, PETRI_PLACES=336, PETRI_TRANSITIONS=465} [2024-06-03 20:09:06,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-03 20:09:06,679 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 465 transitions, 6969 flow [2024-06-03 20:09:06,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:06,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:06,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:06,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:09:06,680 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:06,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:06,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1160029187, now seen corresponding path program 3 times [2024-06-03 20:09:06,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:06,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017544914] [2024-06-03 20:09:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:06,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:07,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:07,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017544914] [2024-06-03 20:09:07,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017544914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:07,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:07,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:07,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389123691] [2024-06-03 20:09:07,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:07,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:07,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:07,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:07,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:07,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:07,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 465 transitions, 6969 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:07,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:07,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:07,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:09,190 INFO L124 PetriNetUnfolderBase]: 3908/5879 cut-off events. [2024-06-03 20:09:09,190 INFO L125 PetriNetUnfolderBase]: For 805401/805401 co-relation queries the response was YES. [2024-06-03 20:09:09,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56528 conditions, 5879 events. 3908/5879 cut-off events. For 805401/805401 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31691 event pairs, 754 based on Foata normal form. 2/5879 useless extension candidates. Maximal degree in co-relation 56369. Up to 5747 conditions per place. [2024-06-03 20:09:09,273 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 43 changer transitions 0/484 dead transitions. [2024-06-03 20:09:09,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 484 transitions, 8015 flow [2024-06-03 20:09:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 20:09:09,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:09:09,275 INFO L175 Difference]: Start difference. First operand has 336 places, 465 transitions, 6969 flow. Second operand 8 states and 123 transitions. [2024-06-03 20:09:09,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 484 transitions, 8015 flow [2024-06-03 20:09:12,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 484 transitions, 7890 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:12,225 INFO L231 Difference]: Finished difference. Result has 338 places, 467 transitions, 6963 flow [2024-06-03 20:09:12,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6844, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6963, PETRI_PLACES=338, PETRI_TRANSITIONS=467} [2024-06-03 20:09:12,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-03 20:09:12,226 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 467 transitions, 6963 flow [2024-06-03 20:09:12,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:12,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:12,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:12,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:09:12,227 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:12,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:12,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2090490117, now seen corresponding path program 3 times [2024-06-03 20:09:12,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:12,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382361966] [2024-06-03 20:09:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:12,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:12,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382361966] [2024-06-03 20:09:12,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382361966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:12,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:12,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:12,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167519274] [2024-06-03 20:09:12,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:12,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:12,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:12,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:12,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:13,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:13,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 467 transitions, 6963 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:13,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:13,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:13,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:14,347 INFO L124 PetriNetUnfolderBase]: 3905/5878 cut-off events. [2024-06-03 20:09:14,348 INFO L125 PetriNetUnfolderBase]: For 817365/817390 co-relation queries the response was YES. [2024-06-03 20:09:14,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56578 conditions, 5878 events. 3905/5878 cut-off events. For 817365/817390 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31716 event pairs, 780 based on Foata normal form. 19/5893 useless extension candidates. Maximal degree in co-relation 56418. Up to 5684 conditions per place. [2024-06-03 20:09:14,431 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 76 changer transitions 0/485 dead transitions. [2024-06-03 20:09:14,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 485 transitions, 8159 flow [2024-06-03 20:09:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 20:09:14,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-03 20:09:14,432 INFO L175 Difference]: Start difference. First operand has 338 places, 467 transitions, 6963 flow. Second operand 8 states and 125 transitions. [2024-06-03 20:09:14,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 485 transitions, 8159 flow [2024-06-03 20:09:17,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 485 transitions, 8038 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:17,440 INFO L231 Difference]: Finished difference. Result has 340 places, 467 transitions, 7000 flow [2024-06-03 20:09:17,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6842, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7000, PETRI_PLACES=340, PETRI_TRANSITIONS=467} [2024-06-03 20:09:17,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-03 20:09:17,441 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 467 transitions, 7000 flow [2024-06-03 20:09:17,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:17,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:17,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:17,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:09:17,441 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:17,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:17,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1862081931, now seen corresponding path program 7 times [2024-06-03 20:09:17,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:17,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23608798] [2024-06-03 20:09:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:17,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:18,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:18,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23608798] [2024-06-03 20:09:18,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23608798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:18,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:18,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:18,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462034145] [2024-06-03 20:09:18,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:18,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:18,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:18,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:18,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:18,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 467 transitions, 7000 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:18,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:18,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:18,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:19,565 INFO L124 PetriNetUnfolderBase]: 3983/5987 cut-off events. [2024-06-03 20:09:19,565 INFO L125 PetriNetUnfolderBase]: For 877314/877337 co-relation queries the response was YES. [2024-06-03 20:09:19,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58247 conditions, 5987 events. 3983/5987 cut-off events. For 877314/877337 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32346 event pairs, 732 based on Foata normal form. 14/5995 useless extension candidates. Maximal degree in co-relation 58086. Up to 4938 conditions per place. [2024-06-03 20:09:19,656 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 364 selfloop transitions, 159 changer transitions 0/526 dead transitions. [2024-06-03 20:09:19,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 526 transitions, 9231 flow [2024-06-03 20:09:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:09:19,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:09:19,658 INFO L175 Difference]: Start difference. First operand has 340 places, 467 transitions, 7000 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:09:19,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 526 transitions, 9231 flow [2024-06-03 20:09:22,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 526 transitions, 9057 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:22,867 INFO L231 Difference]: Finished difference. Result has 345 places, 496 transitions, 7861 flow [2024-06-03 20:09:22,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6826, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7861, PETRI_PLACES=345, PETRI_TRANSITIONS=496} [2024-06-03 20:09:22,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-03 20:09:22,868 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 496 transitions, 7861 flow [2024-06-03 20:09:22,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:22,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:22,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:22,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:09:22,868 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:22,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1862380461, now seen corresponding path program 8 times [2024-06-03 20:09:22,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:22,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584660951] [2024-06-03 20:09:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:22,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:23,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584660951] [2024-06-03 20:09:23,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584660951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:23,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:23,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010759500] [2024-06-03 20:09:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:23,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:23,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:23,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:23,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 496 transitions, 7861 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:23,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:23,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:23,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:25,097 INFO L124 PetriNetUnfolderBase]: 4025/6046 cut-off events. [2024-06-03 20:09:25,098 INFO L125 PetriNetUnfolderBase]: For 911162/911185 co-relation queries the response was YES. [2024-06-03 20:09:25,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61030 conditions, 6046 events. 4025/6046 cut-off events. For 911162/911185 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32722 event pairs, 730 based on Foata normal form. 14/6054 useless extension candidates. Maximal degree in co-relation 60865. Up to 4977 conditions per place. [2024-06-03 20:09:25,191 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 369 selfloop transitions, 159 changer transitions 0/531 dead transitions. [2024-06-03 20:09:25,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 531 transitions, 9785 flow [2024-06-03 20:09:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:09:25,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-03 20:09:25,192 INFO L175 Difference]: Start difference. First operand has 345 places, 496 transitions, 7861 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:09:25,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 531 transitions, 9785 flow [2024-06-03 20:09:28,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 531 transitions, 9526 flow, removed 113 selfloop flow, removed 2 redundant places. [2024-06-03 20:09:28,209 INFO L231 Difference]: Finished difference. Result has 352 places, 504 transitions, 8137 flow [2024-06-03 20:09:28,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7646, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8137, PETRI_PLACES=352, PETRI_TRANSITIONS=504} [2024-06-03 20:09:28,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-03 20:09:28,209 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 504 transitions, 8137 flow [2024-06-03 20:09:28,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:28,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:28,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:28,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:09:28,210 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:28,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:28,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1862380647, now seen corresponding path program 4 times [2024-06-03 20:09:28,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:28,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265710060] [2024-06-03 20:09:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:28,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:28,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265710060] [2024-06-03 20:09:28,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265710060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:28,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:28,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:28,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236594033] [2024-06-03 20:09:28,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:28,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:28,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:28,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:28,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:29,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:29,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 504 transitions, 8137 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:29,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:29,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:29,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:30,459 INFO L124 PetriNetUnfolderBase]: 4022/6041 cut-off events. [2024-06-03 20:09:30,459 INFO L125 PetriNetUnfolderBase]: For 906797/906822 co-relation queries the response was YES. [2024-06-03 20:09:30,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61143 conditions, 6041 events. 4022/6041 cut-off events. For 906797/906822 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32709 event pairs, 782 based on Foata normal form. 19/6056 useless extension candidates. Maximal degree in co-relation 60975. Up to 5848 conditions per place. [2024-06-03 20:09:30,547 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 447 selfloop transitions, 71 changer transitions 0/521 dead transitions. [2024-06-03 20:09:30,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 521 transitions, 9239 flow [2024-06-03 20:09:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 20:09:30,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:09:30,548 INFO L175 Difference]: Start difference. First operand has 352 places, 504 transitions, 8137 flow. Second operand 8 states and 124 transitions. [2024-06-03 20:09:30,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 521 transitions, 9239 flow [2024-06-03 20:09:34,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 521 transitions, 8871 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-03 20:09:34,074 INFO L231 Difference]: Finished difference. Result has 355 places, 504 transitions, 7917 flow [2024-06-03 20:09:34,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7769, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7917, PETRI_PLACES=355, PETRI_TRANSITIONS=504} [2024-06-03 20:09:34,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-03 20:09:34,074 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 504 transitions, 7917 flow [2024-06-03 20:09:34,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:34,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:34,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:34,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:09:34,075 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:34,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1672740537, now seen corresponding path program 4 times [2024-06-03 20:09:34,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:34,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517130834] [2024-06-03 20:09:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:34,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:34,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517130834] [2024-06-03 20:09:34,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517130834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:34,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:34,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048820269] [2024-06-03 20:09:34,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:34,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:34,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:34,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:34,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 504 transitions, 7917 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:34,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:34,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:34,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:36,217 INFO L124 PetriNetUnfolderBase]: 4026/6047 cut-off events. [2024-06-03 20:09:36,217 INFO L125 PetriNetUnfolderBase]: For 930065/930090 co-relation queries the response was YES. [2024-06-03 20:09:36,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60644 conditions, 6047 events. 4026/6047 cut-off events. For 930065/930090 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32752 event pairs, 732 based on Foata normal form. 22/6065 useless extension candidates. Maximal degree in co-relation 60475. Up to 5514 conditions per place. [2024-06-03 20:09:36,299 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 385 selfloop transitions, 141 changer transitions 0/529 dead transitions. [2024-06-03 20:09:36,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 529 transitions, 9496 flow [2024-06-03 20:09:36,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:09:36,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:09:36,301 INFO L175 Difference]: Start difference. First operand has 355 places, 504 transitions, 7917 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:09:36,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 529 transitions, 9496 flow [2024-06-03 20:09:39,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 529 transitions, 9322 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:39,581 INFO L231 Difference]: Finished difference. Result has 357 places, 507 transitions, 8121 flow [2024-06-03 20:09:39,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8121, PETRI_PLACES=357, PETRI_TRANSITIONS=507} [2024-06-03 20:09:39,582 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-03 20:09:39,582 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 507 transitions, 8121 flow [2024-06-03 20:09:39,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:39,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:39,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:39,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:09:39,582 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:39,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2027003577, now seen corresponding path program 5 times [2024-06-03 20:09:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:39,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392284278] [2024-06-03 20:09:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:39,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:40,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:40,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392284278] [2024-06-03 20:09:40,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392284278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:40,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:40,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:40,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190250372] [2024-06-03 20:09:40,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:40,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:40,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:40,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:40,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:40,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:40,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 507 transitions, 8121 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:40,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:40,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:40,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:42,060 INFO L124 PetriNetUnfolderBase]: 4030/6051 cut-off events. [2024-06-03 20:09:42,060 INFO L125 PetriNetUnfolderBase]: For 944535/944535 co-relation queries the response was YES. [2024-06-03 20:09:42,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61134 conditions, 6051 events. 4030/6051 cut-off events. For 944535/944535 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 32776 event pairs, 736 based on Foata normal form. 4/6053 useless extension candidates. Maximal degree in co-relation 60964. Up to 5902 conditions per place. [2024-06-03 20:09:42,139 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 475 selfloop transitions, 54 changer transitions 0/532 dead transitions. [2024-06-03 20:09:42,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 532 transitions, 9697 flow [2024-06-03 20:09:42,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 20:09:42,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-03 20:09:42,141 INFO L175 Difference]: Start difference. First operand has 357 places, 507 transitions, 8121 flow. Second operand 9 states and 141 transitions. [2024-06-03 20:09:42,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 532 transitions, 9697 flow [2024-06-03 20:09:45,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 532 transitions, 9195 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-03 20:09:45,265 INFO L231 Difference]: Finished difference. Result has 358 places, 510 transitions, 7806 flow [2024-06-03 20:09:45,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7625, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7806, PETRI_PLACES=358, PETRI_TRANSITIONS=510} [2024-06-03 20:09:45,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-03 20:09:45,273 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 510 transitions, 7806 flow [2024-06-03 20:09:45,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:45,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:45,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:45,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:09:45,273 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:45,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:45,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2027003205, now seen corresponding path program 9 times [2024-06-03 20:09:45,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:45,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663398694] [2024-06-03 20:09:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:45,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:46,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:46,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663398694] [2024-06-03 20:09:46,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663398694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:46,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:46,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:46,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678645497] [2024-06-03 20:09:46,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:46,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:46,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:46,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:46,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:46,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:46,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 510 transitions, 7806 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:46,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:46,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:46,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:47,855 INFO L124 PetriNetUnfolderBase]: 4156/6228 cut-off events. [2024-06-03 20:09:47,855 INFO L125 PetriNetUnfolderBase]: For 1023111/1023111 co-relation queries the response was YES. [2024-06-03 20:09:47,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62145 conditions, 6228 events. 4156/6228 cut-off events. For 1023111/1023111 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33720 event pairs, 712 based on Foata normal form. 18/6244 useless extension candidates. Maximal degree in co-relation 61976. Up to 5846 conditions per place. [2024-06-03 20:09:47,931 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 470 selfloop transitions, 82 changer transitions 0/555 dead transitions. [2024-06-03 20:09:47,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 555 transitions, 9753 flow [2024-06-03 20:09:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 20:09:47,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-03 20:09:47,933 INFO L175 Difference]: Start difference. First operand has 358 places, 510 transitions, 7806 flow. Second operand 9 states and 151 transitions. [2024-06-03 20:09:47,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 555 transitions, 9753 flow [2024-06-03 20:09:52,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 555 transitions, 9515 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-03 20:09:52,131 INFO L231 Difference]: Finished difference. Result has 361 places, 530 transitions, 8207 flow [2024-06-03 20:09:52,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7568, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8207, PETRI_PLACES=361, PETRI_TRANSITIONS=530} [2024-06-03 20:09:52,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-03 20:09:52,132 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 530 transitions, 8207 flow [2024-06-03 20:09:52,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:52,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:52,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:52,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:09:52,132 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:52,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:52,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1387925539, now seen corresponding path program 10 times [2024-06-03 20:09:52,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:52,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393260719] [2024-06-03 20:09:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:52,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:52,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393260719] [2024-06-03 20:09:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393260719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:52,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:52,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300815727] [2024-06-03 20:09:52,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:52,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:52,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:52,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:52,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 530 transitions, 8207 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:52,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:52,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:52,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:54,617 INFO L124 PetriNetUnfolderBase]: 4330/6471 cut-off events. [2024-06-03 20:09:54,618 INFO L125 PetriNetUnfolderBase]: For 1087977/1087977 co-relation queries the response was YES. [2024-06-03 20:09:54,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65873 conditions, 6471 events. 4330/6471 cut-off events. For 1087977/1087977 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 35126 event pairs, 734 based on Foata normal form. 18/6487 useless extension candidates. Maximal degree in co-relation 65702. Up to 5427 conditions per place. [2024-06-03 20:09:54,700 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 428 selfloop transitions, 161 changer transitions 0/592 dead transitions. [2024-06-03 20:09:54,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 592 transitions, 10490 flow [2024-06-03 20:09:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 20:09:54,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-03 20:09:54,703 INFO L175 Difference]: Start difference. First operand has 361 places, 530 transitions, 8207 flow. Second operand 8 states and 156 transitions. [2024-06-03 20:09:54,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 592 transitions, 10490 flow [2024-06-03 20:09:59,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 592 transitions, 10302 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:59,926 INFO L231 Difference]: Finished difference. Result has 367 places, 556 transitions, 9095 flow [2024-06-03 20:09:59,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8019, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9095, PETRI_PLACES=367, PETRI_TRANSITIONS=556} [2024-06-03 20:09:59,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-03 20:09:59,927 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 556 transitions, 9095 flow [2024-06-03 20:09:59,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:59,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:59,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:59,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:09:59,927 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:59,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1193454847, now seen corresponding path program 6 times [2024-06-03 20:09:59,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:59,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290632316] [2024-06-03 20:09:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:59,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:00,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:00,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290632316] [2024-06-03 20:10:00,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290632316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:00,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:00,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:00,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469004986] [2024-06-03 20:10:00,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:00,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:00,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:00,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:00,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:00,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 556 transitions, 9095 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:00,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:00,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:00,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:02,443 INFO L124 PetriNetUnfolderBase]: 4334/6478 cut-off events. [2024-06-03 20:10:02,444 INFO L125 PetriNetUnfolderBase]: For 1051985/1051985 co-relation queries the response was YES. [2024-06-03 20:10:02,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67620 conditions, 6478 events. 4334/6478 cut-off events. For 1051985/1051985 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35198 event pairs, 782 based on Foata normal form. 4/6480 useless extension candidates. Maximal degree in co-relation 67445. Up to 6172 conditions per place. [2024-06-03 20:10:02,529 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 499 selfloop transitions, 84 changer transitions 0/586 dead transitions. [2024-06-03 20:10:02,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 586 transitions, 10823 flow [2024-06-03 20:10:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:10:02,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-03 20:10:02,530 INFO L175 Difference]: Start difference. First operand has 367 places, 556 transitions, 9095 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:10:02,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 586 transitions, 10823 flow [2024-06-03 20:10:07,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 586 transitions, 10554 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-03 20:10:07,123 INFO L231 Difference]: Finished difference. Result has 371 places, 559 transitions, 9093 flow [2024-06-03 20:10:07,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8830, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9093, PETRI_PLACES=371, PETRI_TRANSITIONS=559} [2024-06-03 20:10:07,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-03 20:10:07,124 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 559 transitions, 9093 flow [2024-06-03 20:10:07,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:07,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:07,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:07,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:10:07,125 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:07,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:07,125 INFO L85 PathProgramCache]: Analyzing trace with hash -385786863, now seen corresponding path program 7 times [2024-06-03 20:10:07,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:07,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275918998] [2024-06-03 20:10:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:07,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:07,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:07,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275918998] [2024-06-03 20:10:07,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275918998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:07,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:07,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:07,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813867926] [2024-06-03 20:10:07,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:07,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:07,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:07,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:07,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 559 transitions, 9093 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:07,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:07,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:07,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:09,688 INFO L124 PetriNetUnfolderBase]: 4318/6456 cut-off events. [2024-06-03 20:10:09,688 INFO L125 PetriNetUnfolderBase]: For 1037644/1037644 co-relation queries the response was YES. [2024-06-03 20:10:09,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66582 conditions, 6456 events. 4318/6456 cut-off events. For 1037644/1037644 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 35072 event pairs, 728 based on Foata normal form. 4/6458 useless extension candidates. Maximal degree in co-relation 66406. Up to 6333 conditions per place. [2024-06-03 20:10:09,771 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 532 selfloop transitions, 42 changer transitions 0/577 dead transitions. [2024-06-03 20:10:09,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 577 transitions, 10325 flow [2024-06-03 20:10:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 20:10:09,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:10:09,773 INFO L175 Difference]: Start difference. First operand has 371 places, 559 transitions, 9093 flow. Second operand 8 states and 123 transitions. [2024-06-03 20:10:09,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 577 transitions, 10325 flow [2024-06-03 20:10:12,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 577 transitions, 10115 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-03 20:10:12,780 INFO L231 Difference]: Finished difference. Result has 376 places, 559 transitions, 8981 flow [2024-06-03 20:10:12,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8883, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8981, PETRI_PLACES=376, PETRI_TRANSITIONS=559} [2024-06-03 20:10:12,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-03 20:10:12,781 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 559 transitions, 8981 flow [2024-06-03 20:10:12,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:12,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:12,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:12,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:10:12,782 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:12,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:12,782 INFO L85 PathProgramCache]: Analyzing trace with hash -390440955, now seen corresponding path program 11 times [2024-06-03 20:10:12,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:12,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204702438] [2024-06-03 20:10:12,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:12,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:13,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:13,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204702438] [2024-06-03 20:10:13,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204702438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:13,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:13,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:13,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090376346] [2024-06-03 20:10:13,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:13,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:13,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:13,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:13,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 559 transitions, 8981 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:13,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:13,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:13,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:15,313 INFO L124 PetriNetUnfolderBase]: 4336/6481 cut-off events. [2024-06-03 20:10:15,313 INFO L125 PetriNetUnfolderBase]: For 1057627/1057627 co-relation queries the response was YES. [2024-06-03 20:10:15,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66502 conditions, 6481 events. 4336/6481 cut-off events. For 1057627/1057627 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35250 event pairs, 785 based on Foata normal form. 6/6485 useless extension candidates. Maximal degree in co-relation 66324. Up to 6173 conditions per place. [2024-06-03 20:10:15,397 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 507 selfloop transitions, 81 changer transitions 0/591 dead transitions. [2024-06-03 20:10:15,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 591 transitions, 10572 flow [2024-06-03 20:10:15,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:15,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:10:15,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-03 20:10:15,398 INFO L175 Difference]: Start difference. First operand has 376 places, 559 transitions, 8981 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:10:15,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 591 transitions, 10572 flow [2024-06-03 20:10:19,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 591 transitions, 10474 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 20:10:19,253 INFO L231 Difference]: Finished difference. Result has 377 places, 563 transitions, 9214 flow [2024-06-03 20:10:19,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8883, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9214, PETRI_PLACES=377, PETRI_TRANSITIONS=563} [2024-06-03 20:10:19,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-03 20:10:19,253 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 563 transitions, 9214 flow [2024-06-03 20:10:19,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:19,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:19,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:19,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:10:19,254 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:19,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:19,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2066101045, now seen corresponding path program 8 times [2024-06-03 20:10:19,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:19,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775976130] [2024-06-03 20:10:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:19,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:19,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:19,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775976130] [2024-06-03 20:10:19,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775976130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:19,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:19,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:19,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990324009] [2024-06-03 20:10:19,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:19,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:20,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:20,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 563 transitions, 9214 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:20,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:20,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:20,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:21,763 INFO L124 PetriNetUnfolderBase]: 4346/6496 cut-off events. [2024-06-03 20:10:21,763 INFO L125 PetriNetUnfolderBase]: For 1065671/1065671 co-relation queries the response was YES. [2024-06-03 20:10:21,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67317 conditions, 6496 events. 4346/6496 cut-off events. For 1065671/1065671 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35264 event pairs, 840 based on Foata normal form. 2/6496 useless extension candidates. Maximal degree in co-relation 67137. Up to 6399 conditions per place. [2024-06-03 20:10:21,853 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 543 selfloop transitions, 41 changer transitions 0/587 dead transitions. [2024-06-03 20:10:21,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 587 transitions, 10724 flow [2024-06-03 20:10:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:21,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 20:10:21,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-03 20:10:21,854 INFO L175 Difference]: Start difference. First operand has 377 places, 563 transitions, 9214 flow. Second operand 7 states and 117 transitions. [2024-06-03 20:10:21,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 587 transitions, 10724 flow [2024-06-03 20:10:26,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 587 transitions, 10555 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 20:10:26,471 INFO L231 Difference]: Finished difference. Result has 379 places, 566 transitions, 9205 flow [2024-06-03 20:10:26,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9047, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9205, PETRI_PLACES=379, PETRI_TRANSITIONS=566} [2024-06-03 20:10:26,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-03 20:10:26,471 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 566 transitions, 9205 flow [2024-06-03 20:10:26,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:26,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:26,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:26,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:10:26,472 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:26,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2066338195, now seen corresponding path program 9 times [2024-06-03 20:10:26,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:26,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521878710] [2024-06-03 20:10:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:26,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:27,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:27,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521878710] [2024-06-03 20:10:27,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521878710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:27,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:27,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635886941] [2024-06-03 20:10:27,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:27,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:27,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:27,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:27,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:27,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 566 transitions, 9205 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:27,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:27,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:27,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:29,013 INFO L124 PetriNetUnfolderBase]: 4340/6488 cut-off events. [2024-06-03 20:10:29,014 INFO L125 PetriNetUnfolderBase]: For 1055469/1055469 co-relation queries the response was YES. [2024-06-03 20:10:29,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66703 conditions, 6488 events. 4340/6488 cut-off events. For 1055469/1055469 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35225 event pairs, 787 based on Foata normal form. 2/6488 useless extension candidates. Maximal degree in co-relation 66523. Up to 6427 conditions per place. [2024-06-03 20:10:29,100 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 27 changer transitions 0/582 dead transitions. [2024-06-03 20:10:29,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 582 transitions, 10427 flow [2024-06-03 20:10:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-03 20:10:29,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-03 20:10:29,101 INFO L175 Difference]: Start difference. First operand has 379 places, 566 transitions, 9205 flow. Second operand 7 states and 110 transitions. [2024-06-03 20:10:29,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 582 transitions, 10427 flow [2024-06-03 20:10:33,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 582 transitions, 10155 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 20:10:33,507 INFO L231 Difference]: Finished difference. Result has 379 places, 566 transitions, 8993 flow [2024-06-03 20:10:33,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8933, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8993, PETRI_PLACES=379, PETRI_TRANSITIONS=566} [2024-06-03 20:10:33,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-03 20:10:33,508 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 566 transitions, 8993 flow [2024-06-03 20:10:33,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:33,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:33,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:33,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:10:33,509 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:33,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2066096023, now seen corresponding path program 12 times [2024-06-03 20:10:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:33,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064006960] [2024-06-03 20:10:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:33,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:34,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:34,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064006960] [2024-06-03 20:10:34,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064006960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:34,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:34,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:34,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652623821] [2024-06-03 20:10:34,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:34,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:34,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:34,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:34,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 566 transitions, 8993 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:34,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:34,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:34,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:36,031 INFO L124 PetriNetUnfolderBase]: 4351/6503 cut-off events. [2024-06-03 20:10:36,031 INFO L125 PetriNetUnfolderBase]: For 1079307/1079307 co-relation queries the response was YES. [2024-06-03 20:10:36,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66543 conditions, 6503 events. 4351/6503 cut-off events. For 1079307/1079307 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 35312 event pairs, 794 based on Foata normal form. 6/6507 useless extension candidates. Maximal degree in co-relation 66362. Up to 6309 conditions per place. [2024-06-03 20:10:36,120 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 535 selfloop transitions, 62 changer transitions 0/600 dead transitions. [2024-06-03 20:10:36,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 600 transitions, 10404 flow [2024-06-03 20:10:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:10:36,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-03 20:10:36,121 INFO L175 Difference]: Start difference. First operand has 379 places, 566 transitions, 8993 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:10:36,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 600 transitions, 10404 flow [2024-06-03 20:10:41,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 600 transitions, 10287 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:10:41,073 INFO L231 Difference]: Finished difference. Result has 381 places, 573 transitions, 9145 flow [2024-06-03 20:10:41,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8876, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9145, PETRI_PLACES=381, PETRI_TRANSITIONS=573} [2024-06-03 20:10:41,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-03 20:10:41,073 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 573 transitions, 9145 flow [2024-06-03 20:10:41,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:41,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:41,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:41,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:10:41,074 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:41,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:41,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1610537779, now seen corresponding path program 2 times [2024-06-03 20:10:41,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:41,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134142664] [2024-06-03 20:10:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:41,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:42,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:42,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134142664] [2024-06-03 20:10:42,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134142664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:42,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:42,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:42,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214022779] [2024-06-03 20:10:42,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:42,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:42,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:42,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:42,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:42,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:42,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 573 transitions, 9145 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:42,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:42,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:42,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:44,020 INFO L124 PetriNetUnfolderBase]: 4359/6516 cut-off events. [2024-06-03 20:10:44,020 INFO L125 PetriNetUnfolderBase]: For 1086355/1086355 co-relation queries the response was YES. [2024-06-03 20:10:44,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67815 conditions, 6516 events. 4359/6516 cut-off events. For 1086355/1086355 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 35436 event pairs, 784 based on Foata normal form. 2/6516 useless extension candidates. Maximal degree in co-relation 67632. Up to 6450 conditions per place. [2024-06-03 20:10:44,113 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 560 selfloop transitions, 27 changer transitions 0/590 dead transitions. [2024-06-03 20:10:44,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 590 transitions, 10441 flow [2024-06-03 20:10:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:10:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:10:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-03 20:10:44,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:10:44,114 INFO L175 Difference]: Start difference. First operand has 381 places, 573 transitions, 9145 flow. Second operand 6 states and 100 transitions. [2024-06-03 20:10:44,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 590 transitions, 10441 flow [2024-06-03 20:10:50,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 590 transitions, 10346 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 20:10:50,507 INFO L231 Difference]: Finished difference. Result has 383 places, 575 transitions, 9179 flow [2024-06-03 20:10:50,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9050, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9179, PETRI_PLACES=383, PETRI_TRANSITIONS=575} [2024-06-03 20:10:50,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-03 20:10:50,508 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 575 transitions, 9179 flow [2024-06-03 20:10:50,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:50,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:50,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:50,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:10:50,508 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:50,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:50,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1211040469, now seen corresponding path program 3 times [2024-06-03 20:10:50,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:50,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521109350] [2024-06-03 20:10:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:50,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:51,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:51,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521109350] [2024-06-03 20:10:51,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521109350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:51,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:51,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:51,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129388588] [2024-06-03 20:10:51,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:51,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:51,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:51,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:51,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:51,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 575 transitions, 9179 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:51,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:51,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:51,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:53,450 INFO L124 PetriNetUnfolderBase]: 4367/6528 cut-off events. [2024-06-03 20:10:53,450 INFO L125 PetriNetUnfolderBase]: For 1110539/1110539 co-relation queries the response was YES. [2024-06-03 20:10:53,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68081 conditions, 6528 events. 4367/6528 cut-off events. For 1110539/1110539 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35499 event pairs, 786 based on Foata normal form. 2/6528 useless extension candidates. Maximal degree in co-relation 67898. Up to 6476 conditions per place. [2024-06-03 20:10:53,552 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 558 selfloop transitions, 29 changer transitions 0/590 dead transitions. [2024-06-03 20:10:53,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 590 transitions, 10493 flow [2024-06-03 20:10:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:10:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:10:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-03 20:10:53,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-03 20:10:53,554 INFO L175 Difference]: Start difference. First operand has 383 places, 575 transitions, 9179 flow. Second operand 9 states and 123 transitions. [2024-06-03 20:10:53,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 590 transitions, 10493 flow [2024-06-03 20:10:58,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 590 transitions, 10378 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 20:10:58,754 INFO L231 Difference]: Finished difference. Result has 389 places, 579 transitions, 9244 flow [2024-06-03 20:10:58,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9066, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9244, PETRI_PLACES=389, PETRI_TRANSITIONS=579} [2024-06-03 20:10:58,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-03 20:10:58,755 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 579 transitions, 9244 flow [2024-06-03 20:10:58,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:58,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:58,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:58,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:10:58,755 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:58,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1648931829, now seen corresponding path program 4 times [2024-06-03 20:10:58,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:58,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139149467] [2024-06-03 20:10:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:58,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:59,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:59,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139149467] [2024-06-03 20:10:59,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139149467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:59,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:59,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:59,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952759343] [2024-06-03 20:10:59,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:00,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:00,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 579 transitions, 9244 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:00,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:00,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:00,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:01,724 INFO L124 PetriNetUnfolderBase]: 4362/6521 cut-off events. [2024-06-03 20:11:01,725 INFO L125 PetriNetUnfolderBase]: For 1123120/1123120 co-relation queries the response was YES. [2024-06-03 20:11:01,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68022 conditions, 6521 events. 4362/6521 cut-off events. For 1123120/1123120 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35459 event pairs, 823 based on Foata normal form. 2/6521 useless extension candidates. Maximal degree in co-relation 67837. Up to 6441 conditions per place. [2024-06-03 20:11:01,828 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 562 selfloop transitions, 32 changer transitions 0/597 dead transitions. [2024-06-03 20:11:01,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 597 transitions, 10558 flow [2024-06-03 20:11:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-03 20:11:01,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:11:01,829 INFO L175 Difference]: Start difference. First operand has 389 places, 579 transitions, 9244 flow. Second operand 7 states and 112 transitions. [2024-06-03 20:11:01,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 597 transitions, 10558 flow [2024-06-03 20:11:07,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 597 transitions, 10383 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-03 20:11:07,592 INFO L231 Difference]: Finished difference. Result has 388 places, 581 transitions, 9216 flow [2024-06-03 20:11:07,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9069, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9216, PETRI_PLACES=388, PETRI_TRANSITIONS=581} [2024-06-03 20:11:07,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-03 20:11:07,593 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 581 transitions, 9216 flow [2024-06-03 20:11:07,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:07,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:07,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:07,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:11:07,593 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:07,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1210671073, now seen corresponding path program 4 times [2024-06-03 20:11:07,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:07,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553309680] [2024-06-03 20:11:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:07,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:08,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:08,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553309680] [2024-06-03 20:11:08,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553309680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:08,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:08,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:08,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881680152] [2024-06-03 20:11:08,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:08,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:08,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:08,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:08,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 581 transitions, 9216 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:08,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:08,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:08,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:10,360 INFO L124 PetriNetUnfolderBase]: 4401/6583 cut-off events. [2024-06-03 20:11:10,360 INFO L125 PetriNetUnfolderBase]: For 1194528/1194528 co-relation queries the response was YES. [2024-06-03 20:11:10,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68562 conditions, 6583 events. 4401/6583 cut-off events. For 1194528/1194528 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 35872 event pairs, 706 based on Foata normal form. 14/6595 useless extension candidates. Maximal degree in co-relation 68379. Up to 6349 conditions per place. [2024-06-03 20:11:10,466 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 558 selfloop transitions, 51 changer transitions 0/612 dead transitions. [2024-06-03 20:11:10,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 612 transitions, 10638 flow [2024-06-03 20:11:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:11:10,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-03 20:11:10,468 INFO L175 Difference]: Start difference. First operand has 388 places, 581 transitions, 9216 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:11:10,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 612 transitions, 10638 flow [2024-06-03 20:11:15,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 612 transitions, 10455 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:15,894 INFO L231 Difference]: Finished difference. Result has 390 places, 582 transitions, 9182 flow [2024-06-03 20:11:15,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9033, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9182, PETRI_PLACES=390, PETRI_TRANSITIONS=582} [2024-06-03 20:11:15,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-03 20:11:15,894 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 582 transitions, 9182 flow [2024-06-03 20:11:15,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:15,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:15,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:15,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:11:15,895 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:15,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1909101339, now seen corresponding path program 1 times [2024-06-03 20:11:15,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:15,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087348749] [2024-06-03 20:11:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:15,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:16,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:16,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087348749] [2024-06-03 20:11:16,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087348749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:16,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:16,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:16,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171494256] [2024-06-03 20:11:16,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:16,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:16,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:16,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:16,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:16,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 582 transitions, 9182 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:16,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:16,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:16,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:18,539 INFO L124 PetriNetUnfolderBase]: 4430/6626 cut-off events. [2024-06-03 20:11:18,539 INFO L125 PetriNetUnfolderBase]: For 1181376/1181380 co-relation queries the response was YES. [2024-06-03 20:11:18,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69211 conditions, 6626 events. 4430/6626 cut-off events. For 1181376/1181380 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36247 event pairs, 758 based on Foata normal form. 8/6631 useless extension candidates. Maximal degree in co-relation 69027. Up to 6305 conditions per place. [2024-06-03 20:11:18,655 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 510 selfloop transitions, 102 changer transitions 0/615 dead transitions. [2024-06-03 20:11:18,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 615 transitions, 11074 flow [2024-06-03 20:11:18,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:11:18,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:11:18,656 INFO L175 Difference]: Start difference. First operand has 390 places, 582 transitions, 9182 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:11:18,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 615 transitions, 11074 flow [2024-06-03 20:11:23,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 615 transitions, 10955 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:23,131 INFO L231 Difference]: Finished difference. Result has 394 places, 588 transitions, 9463 flow [2024-06-03 20:11:23,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9067, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9463, PETRI_PLACES=394, PETRI_TRANSITIONS=588} [2024-06-03 20:11:23,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-03 20:11:23,131 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 588 transitions, 9463 flow [2024-06-03 20:11:23,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:23,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:23,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:23,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:11:23,132 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:23,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1909161789, now seen corresponding path program 2 times [2024-06-03 20:11:23,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:23,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517096185] [2024-06-03 20:11:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:23,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:24,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:24,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517096185] [2024-06-03 20:11:24,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517096185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:24,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:24,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:24,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600715485] [2024-06-03 20:11:24,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:24,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:24,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:24,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:24,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:24,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 588 transitions, 9463 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:24,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:24,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:24,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:25,899 INFO L124 PetriNetUnfolderBase]: 4446/6651 cut-off events. [2024-06-03 20:11:25,899 INFO L125 PetriNetUnfolderBase]: For 1181309/1181325 co-relation queries the response was YES. [2024-06-03 20:11:25,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69662 conditions, 6651 events. 4446/6651 cut-off events. For 1181309/1181325 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36460 event pairs, 794 based on Foata normal form. 16/6663 useless extension candidates. Maximal degree in co-relation 69477. Up to 6398 conditions per place. [2024-06-03 20:11:26,021 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 513 selfloop transitions, 98 changer transitions 0/614 dead transitions. [2024-06-03 20:11:26,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 614 transitions, 11057 flow [2024-06-03 20:11:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-03 20:11:26,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-03 20:11:26,022 INFO L175 Difference]: Start difference. First operand has 394 places, 588 transitions, 9463 flow. Second operand 10 states and 154 transitions. [2024-06-03 20:11:26,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 614 transitions, 11057 flow [2024-06-03 20:11:32,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 614 transitions, 10752 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:32,072 INFO L231 Difference]: Finished difference. Result has 399 places, 591 transitions, 9462 flow [2024-06-03 20:11:32,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9206, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9462, PETRI_PLACES=399, PETRI_TRANSITIONS=591} [2024-06-03 20:11:32,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-03 20:11:32,073 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 591 transitions, 9462 flow [2024-06-03 20:11:32,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:32,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:32,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:32,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:11:32,074 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:32,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:32,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1909161913, now seen corresponding path program 1 times [2024-06-03 20:11:32,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:32,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469601931] [2024-06-03 20:11:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:32,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:32,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:32,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469601931] [2024-06-03 20:11:32,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469601931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:32,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:32,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:32,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255648709] [2024-06-03 20:11:32,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:32,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:32,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:32,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:33,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:33,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 591 transitions, 9462 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:33,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:33,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:33,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:34,863 INFO L124 PetriNetUnfolderBase]: 4492/6715 cut-off events. [2024-06-03 20:11:34,863 INFO L125 PetriNetUnfolderBase]: For 1212018/1212034 co-relation queries the response was YES. [2024-06-03 20:11:34,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70482 conditions, 6715 events. 4492/6715 cut-off events. For 1212018/1212034 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 36830 event pairs, 726 based on Foata normal form. 16/6727 useless extension candidates. Maximal degree in co-relation 70295. Up to 6023 conditions per place. [2024-06-03 20:11:34,982 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 440 selfloop transitions, 192 changer transitions 0/635 dead transitions. [2024-06-03 20:11:34,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 635 transitions, 11754 flow [2024-06-03 20:11:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:11:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:11:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-03 20:11:34,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924611973392461 [2024-06-03 20:11:34,983 INFO L175 Difference]: Start difference. First operand has 399 places, 591 transitions, 9462 flow. Second operand 11 states and 177 transitions. [2024-06-03 20:11:34,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 635 transitions, 11754 flow [2024-06-03 20:11:40,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 635 transitions, 11526 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-03 20:11:40,244 INFO L231 Difference]: Finished difference. Result has 403 places, 605 transitions, 9984 flow [2024-06-03 20:11:40,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9234, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9984, PETRI_PLACES=403, PETRI_TRANSITIONS=605} [2024-06-03 20:11:40,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-03 20:11:40,245 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 605 transitions, 9984 flow [2024-06-03 20:11:40,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:40,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:40,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:40,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:11:40,245 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:40,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:40,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2027249469, now seen corresponding path program 3 times [2024-06-03 20:11:40,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:40,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880853743] [2024-06-03 20:11:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:40,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:41,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880853743] [2024-06-03 20:11:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880853743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:41,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:41,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:41,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862641230] [2024-06-03 20:11:41,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:41,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:41,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:41,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:41,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:41,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 605 transitions, 9984 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:41,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:41,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:41,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:43,219 INFO L124 PetriNetUnfolderBase]: 4817/7248 cut-off events. [2024-06-03 20:11:43,219 INFO L125 PetriNetUnfolderBase]: For 1622816/1622816 co-relation queries the response was YES. [2024-06-03 20:11:43,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75471 conditions, 7248 events. 4817/7248 cut-off events. For 1622816/1622816 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 40238 event pairs, 782 based on Foata normal form. 78/7324 useless extension candidates. Maximal degree in co-relation 75282. Up to 6491 conditions per place. [2024-06-03 20:11:43,345 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 564 selfloop transitions, 76 changer transitions 0/643 dead transitions. [2024-06-03 20:11:43,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 643 transitions, 11838 flow [2024-06-03 20:11:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-03 20:11:43,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-03 20:11:43,346 INFO L175 Difference]: Start difference. First operand has 403 places, 605 transitions, 9984 flow. Second operand 10 states and 167 transitions. [2024-06-03 20:11:43,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 643 transitions, 11838 flow [2024-06-03 20:11:49,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 643 transitions, 11486 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:49,845 INFO L231 Difference]: Finished difference. Result has 406 places, 611 transitions, 9966 flow [2024-06-03 20:11:49,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9632, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9966, PETRI_PLACES=406, PETRI_TRANSITIONS=611} [2024-06-03 20:11:49,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-03 20:11:49,846 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 611 transitions, 9966 flow [2024-06-03 20:11:49,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:49,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:49,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:49,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:11:49,847 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:49,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:49,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2078077407, now seen corresponding path program 2 times [2024-06-03 20:11:49,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:49,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146479034] [2024-06-03 20:11:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:49,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:50,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:50,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146479034] [2024-06-03 20:11:50,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146479034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:50,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:50,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:50,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517080950] [2024-06-03 20:11:50,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:50,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:50,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:50,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:50,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 611 transitions, 9966 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:50,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:50,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:50,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:52,815 INFO L124 PetriNetUnfolderBase]: 5025/7536 cut-off events. [2024-06-03 20:11:52,815 INFO L125 PetriNetUnfolderBase]: For 1405643/1405643 co-relation queries the response was YES. [2024-06-03 20:11:52,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80651 conditions, 7536 events. 5025/7536 cut-off events. For 1405643/1405643 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 41962 event pairs, 828 based on Foata normal form. 8/7542 useless extension candidates. Maximal degree in co-relation 80460. Up to 7027 conditions per place. [2024-06-03 20:11:52,950 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 560 selfloop transitions, 97 changer transitions 0/660 dead transitions. [2024-06-03 20:11:52,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 660 transitions, 12562 flow [2024-06-03 20:11:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-03 20:11:52,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:11:52,951 INFO L175 Difference]: Start difference. First operand has 406 places, 611 transitions, 9966 flow. Second operand 10 states and 165 transitions. [2024-06-03 20:11:52,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 660 transitions, 12562 flow [2024-06-03 20:11:58,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 660 transitions, 12352 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-03 20:11:58,987 INFO L231 Difference]: Finished difference. Result has 409 places, 632 transitions, 10535 flow [2024-06-03 20:11:58,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9756, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10535, PETRI_PLACES=409, PETRI_TRANSITIONS=632} [2024-06-03 20:11:58,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-03 20:11:58,988 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 632 transitions, 10535 flow [2024-06-03 20:11:58,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:58,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:58,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:58,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:11:58,989 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:58,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2077892833, now seen corresponding path program 1 times [2024-06-03 20:11:58,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:58,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296011628] [2024-06-03 20:11:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:58,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:59,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:59,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296011628] [2024-06-03 20:11:59,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296011628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:59,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:59,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:59,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956360002] [2024-06-03 20:11:59,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:59,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:59,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:59,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:59,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:00,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:00,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 632 transitions, 10535 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:00,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:00,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:00,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:02,159 INFO L124 PetriNetUnfolderBase]: 5033/7548 cut-off events. [2024-06-03 20:12:02,160 INFO L125 PetriNetUnfolderBase]: For 1401046/1401046 co-relation queries the response was YES. [2024-06-03 20:12:02,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81546 conditions, 7548 events. 5033/7548 cut-off events. For 1401046/1401046 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42102 event pairs, 887 based on Foata normal form. 2/7548 useless extension candidates. Maximal degree in co-relation 81353. Up to 7483 conditions per place. [2024-06-03 20:12:02,274 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 618 selfloop transitions, 29 changer transitions 0/650 dead transitions. [2024-06-03 20:12:02,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 650 transitions, 11951 flow [2024-06-03 20:12:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-03 20:12:02,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-03 20:12:02,276 INFO L175 Difference]: Start difference. First operand has 409 places, 632 transitions, 10535 flow. Second operand 8 states and 119 transitions. [2024-06-03 20:12:02,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 650 transitions, 11951 flow [2024-06-03 20:12:07,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 650 transitions, 11674 flow, removed 120 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:07,097 INFO L231 Difference]: Finished difference. Result has 413 places, 634 transitions, 10381 flow [2024-06-03 20:12:07,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10258, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10381, PETRI_PLACES=413, PETRI_TRANSITIONS=634} [2024-06-03 20:12:07,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-03 20:12:07,098 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 634 transitions, 10381 flow [2024-06-03 20:12:07,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:07,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:07,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:07,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:12:07,098 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:07,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:07,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2027254243, now seen corresponding path program 3 times [2024-06-03 20:12:07,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:07,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255946897] [2024-06-03 20:12:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:07,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:08,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255946897] [2024-06-03 20:12:08,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255946897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:08,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:08,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:08,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006796500] [2024-06-03 20:12:08,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:08,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:08,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:08,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:08,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 634 transitions, 10381 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:08,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:08,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:08,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:10,294 INFO L124 PetriNetUnfolderBase]: 5097/7638 cut-off events. [2024-06-03 20:12:10,295 INFO L125 PetriNetUnfolderBase]: For 1465084/1465084 co-relation queries the response was YES. [2024-06-03 20:12:10,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82082 conditions, 7638 events. 5097/7638 cut-off events. For 1465084/1465084 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 42566 event pairs, 861 based on Foata normal form. 8/7644 useless extension candidates. Maximal degree in co-relation 81887. Up to 7220 conditions per place. [2024-06-03 20:12:10,425 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 587 selfloop transitions, 81 changer transitions 0/671 dead transitions. [2024-06-03 20:12:10,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 671 transitions, 12660 flow [2024-06-03 20:12:10,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:12:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:12:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 20:12:10,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:12:10,426 INFO L175 Difference]: Start difference. First operand has 413 places, 634 transitions, 10381 flow. Second operand 10 states and 164 transitions. [2024-06-03 20:12:10,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 671 transitions, 12660 flow [2024-06-03 20:12:16,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 671 transitions, 12527 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 20:12:16,115 INFO L231 Difference]: Finished difference. Result has 418 places, 643 transitions, 10612 flow [2024-06-03 20:12:16,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10248, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10612, PETRI_PLACES=418, PETRI_TRANSITIONS=643} [2024-06-03 20:12:16,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-03 20:12:16,115 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 643 transitions, 10612 flow [2024-06-03 20:12:16,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:16,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:16,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:16,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:12:16,116 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:16,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:16,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1616257651, now seen corresponding path program 2 times [2024-06-03 20:12:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981700974] [2024-06-03 20:12:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:17,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:17,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981700974] [2024-06-03 20:12:17,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981700974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:17,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:17,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267075213] [2024-06-03 20:12:17,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:17,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:17,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:17,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:17,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:17,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:17,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 643 transitions, 10612 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:17,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:17,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:17,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:19,132 INFO L124 PetriNetUnfolderBase]: 5105/7650 cut-off events. [2024-06-03 20:12:19,133 INFO L125 PetriNetUnfolderBase]: For 1457693/1457693 co-relation queries the response was YES. [2024-06-03 20:12:19,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82656 conditions, 7650 events. 5105/7650 cut-off events. For 1457693/1457693 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42675 event pairs, 1066 based on Foata normal form. 2/7650 useless extension candidates. Maximal degree in co-relation 82461. Up to 7612 conditions per place. [2024-06-03 20:12:19,266 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 636 selfloop transitions, 18 changer transitions 0/657 dead transitions. [2024-06-03 20:12:19,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 657 transitions, 12022 flow [2024-06-03 20:12:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-03 20:12:19,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3224932249322493 [2024-06-03 20:12:19,268 INFO L175 Difference]: Start difference. First operand has 418 places, 643 transitions, 10612 flow. Second operand 9 states and 119 transitions. [2024-06-03 20:12:19,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 657 transitions, 12022 flow [2024-06-03 20:12:23,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 657 transitions, 11774 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:23,940 INFO L231 Difference]: Finished difference. Result has 420 places, 645 transitions, 10469 flow [2024-06-03 20:12:23,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10364, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10469, PETRI_PLACES=420, PETRI_TRANSITIONS=645} [2024-06-03 20:12:23,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-03 20:12:23,941 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 645 transitions, 10469 flow [2024-06-03 20:12:23,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:23,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:23,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:23,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:12:23,942 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:23,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash 688308159, now seen corresponding path program 1 times [2024-06-03 20:12:23,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:23,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152249291] [2024-06-03 20:12:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:23,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:25,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:25,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152249291] [2024-06-03 20:12:25,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152249291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:25,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:25,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:25,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641965212] [2024-06-03 20:12:25,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:25,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:25,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:25,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:25,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:25,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:25,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 645 transitions, 10469 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:25,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:25,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:25,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:27,092 INFO L124 PetriNetUnfolderBase]: 5099/7642 cut-off events. [2024-06-03 20:12:27,093 INFO L125 PetriNetUnfolderBase]: For 1470890/1470890 co-relation queries the response was YES. [2024-06-03 20:12:27,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82091 conditions, 7642 events. 5099/7642 cut-off events. For 1470890/1470890 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42681 event pairs, 1019 based on Foata normal form. 2/7642 useless extension candidates. Maximal degree in co-relation 81896. Up to 7532 conditions per place. [2024-06-03 20:12:27,223 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 616 selfloop transitions, 46 changer transitions 0/665 dead transitions. [2024-06-03 20:12:27,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 665 transitions, 12230 flow [2024-06-03 20:12:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:12:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:12:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-03 20:12:27,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33414634146341465 [2024-06-03 20:12:27,224 INFO L175 Difference]: Start difference. First operand has 420 places, 645 transitions, 10469 flow. Second operand 10 states and 137 transitions. [2024-06-03 20:12:27,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 665 transitions, 12230 flow [2024-06-03 20:12:31,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 665 transitions, 12072 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-03 20:12:31,948 INFO L231 Difference]: Finished difference. Result has 423 places, 651 transitions, 10628 flow [2024-06-03 20:12:31,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10311, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10628, PETRI_PLACES=423, PETRI_TRANSITIONS=651} [2024-06-03 20:12:31,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-03 20:12:31,948 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 651 transitions, 10628 flow [2024-06-03 20:12:31,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:31,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:31,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:31,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:12:31,949 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:31,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash 688605077, now seen corresponding path program 3 times [2024-06-03 20:12:31,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:31,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738001423] [2024-06-03 20:12:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:32,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:32,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738001423] [2024-06-03 20:12:32,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738001423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:32,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:32,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:32,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327890523] [2024-06-03 20:12:32,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:32,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:32,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:33,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:33,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 651 transitions, 10628 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:33,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:33,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:33,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:35,220 INFO L124 PetriNetUnfolderBase]: 5107/7654 cut-off events. [2024-06-03 20:12:35,220 INFO L125 PetriNetUnfolderBase]: For 1498541/1498541 co-relation queries the response was YES. [2024-06-03 20:12:35,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82542 conditions, 7654 events. 5107/7654 cut-off events. For 1498541/1498541 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 42626 event pairs, 1027 based on Foata normal form. 2/7654 useless extension candidates. Maximal degree in co-relation 82350. Up to 7611 conditions per place. [2024-06-03 20:12:35,334 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 643 selfloop transitions, 19 changer transitions 0/665 dead transitions. [2024-06-03 20:12:35,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 665 transitions, 12050 flow [2024-06-03 20:12:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-03 20:12:35,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3224932249322493 [2024-06-03 20:12:35,336 INFO L175 Difference]: Start difference. First operand has 423 places, 651 transitions, 10628 flow. Second operand 9 states and 119 transitions. [2024-06-03 20:12:35,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 665 transitions, 12050 flow [2024-06-03 20:12:40,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 665 transitions, 11811 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:40,773 INFO L231 Difference]: Finished difference. Result has 425 places, 653 transitions, 10500 flow [2024-06-03 20:12:40,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10389, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10500, PETRI_PLACES=425, PETRI_TRANSITIONS=653} [2024-06-03 20:12:40,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-03 20:12:40,774 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 653 transitions, 10500 flow [2024-06-03 20:12:40,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:40,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:40,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:40,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:12:40,775 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:40,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:40,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2102078693, now seen corresponding path program 4 times [2024-06-03 20:12:40,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:40,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628722344] [2024-06-03 20:12:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:41,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:41,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628722344] [2024-06-03 20:12:41,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628722344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:41,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:41,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75953628] [2024-06-03 20:12:41,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:41,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:41,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:41,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:41,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:41,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 653 transitions, 10500 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:41,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:41,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:41,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:43,953 INFO L124 PetriNetUnfolderBase]: 5429/8187 cut-off events. [2024-06-03 20:12:43,953 INFO L125 PetriNetUnfolderBase]: For 1968846/1968846 co-relation queries the response was YES. [2024-06-03 20:12:44,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86522 conditions, 8187 events. 5429/8187 cut-off events. For 1968846/1968846 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 46279 event pairs, 948 based on Foata normal form. 78/8263 useless extension candidates. Maximal degree in co-relation 86330. Up to 6656 conditions per place. [2024-06-03 20:12:44,088 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 523 selfloop transitions, 178 changer transitions 0/704 dead transitions. [2024-06-03 20:12:44,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 704 transitions, 12768 flow [2024-06-03 20:12:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 20:12:44,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-03 20:12:44,090 INFO L175 Difference]: Start difference. First operand has 425 places, 653 transitions, 10500 flow. Second operand 9 states and 177 transitions. [2024-06-03 20:12:44,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 704 transitions, 12768 flow [2024-06-03 20:12:50,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 704 transitions, 12669 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:50,597 INFO L231 Difference]: Finished difference. Result has 427 places, 658 transitions, 10942 flow [2024-06-03 20:12:50,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10401, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10942, PETRI_PLACES=427, PETRI_TRANSITIONS=658} [2024-06-03 20:12:50,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-03 20:12:50,597 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 658 transitions, 10942 flow [2024-06-03 20:12:50,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:50,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:50,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:50,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:12:50,598 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:50,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:50,598 INFO L85 PathProgramCache]: Analyzing trace with hash -351545539, now seen corresponding path program 4 times [2024-06-03 20:12:50,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:50,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771767034] [2024-06-03 20:12:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:50,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:51,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:51,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771767034] [2024-06-03 20:12:51,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771767034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:51,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:51,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:51,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267307047] [2024-06-03 20:12:51,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:51,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:51,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:51,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:51,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 658 transitions, 10942 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:51,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:51,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:51,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:53,903 INFO L124 PetriNetUnfolderBase]: 5424/8181 cut-off events. [2024-06-03 20:12:53,903 INFO L125 PetriNetUnfolderBase]: For 1552801/1552801 co-relation queries the response was YES. [2024-06-03 20:12:54,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87526 conditions, 8181 events. 5424/8181 cut-off events. For 1552801/1552801 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 46426 event pairs, 1044 based on Foata normal form. 2/8181 useless extension candidates. Maximal degree in co-relation 87333. Up to 8096 conditions per place. [2024-06-03 20:12:54,047 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 634 selfloop transitions, 36 changer transitions 0/673 dead transitions. [2024-06-03 20:12:54,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 673 transitions, 12404 flow [2024-06-03 20:12:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:12:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:12:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-03 20:12:54,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-03 20:12:54,048 INFO L175 Difference]: Start difference. First operand has 427 places, 658 transitions, 10942 flow. Second operand 6 states and 97 transitions. [2024-06-03 20:12:54,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 673 transitions, 12404 flow [2024-06-03 20:12:59,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 673 transitions, 11989 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:59,642 INFO L231 Difference]: Finished difference. Result has 426 places, 660 transitions, 10685 flow [2024-06-03 20:12:59,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10527, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10685, PETRI_PLACES=426, PETRI_TRANSITIONS=660} [2024-06-03 20:12:59,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-03 20:12:59,643 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 660 transitions, 10685 flow [2024-06-03 20:12:59,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:59,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:59,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:59,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:12:59,643 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:59,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1193031201, now seen corresponding path program 4 times [2024-06-03 20:12:59,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:59,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016690334] [2024-06-03 20:12:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:59,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:00,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:00,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016690334] [2024-06-03 20:13:00,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016690334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:00,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:00,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:00,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550094825] [2024-06-03 20:13:00,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:00,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:00,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:00,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:00,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 660 transitions, 10685 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:00,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:00,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:00,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:03,156 INFO L124 PetriNetUnfolderBase]: 5444/8209 cut-off events. [2024-06-03 20:13:03,156 INFO L125 PetriNetUnfolderBase]: For 1581055/1581055 co-relation queries the response was YES. [2024-06-03 20:13:03,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86747 conditions, 8209 events. 5444/8209 cut-off events. For 1581055/1581055 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46565 event pairs, 1030 based on Foata normal form. 4/8211 useless extension candidates. Maximal degree in co-relation 86553. Up to 8054 conditions per place. [2024-06-03 20:13:03,275 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 629 selfloop transitions, 51 changer transitions 0/683 dead transitions. [2024-06-03 20:13:03,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 683 transitions, 12249 flow [2024-06-03 20:13:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-03 20:13:03,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-03 20:13:03,276 INFO L175 Difference]: Start difference. First operand has 426 places, 660 transitions, 10685 flow. Second operand 9 states and 136 transitions. [2024-06-03 20:13:03,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 683 transitions, 12249 flow [2024-06-03 20:13:08,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 683 transitions, 12117 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:08,882 INFO L231 Difference]: Finished difference. Result has 431 places, 664 transitions, 10783 flow [2024-06-03 20:13:08,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10553, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10783, PETRI_PLACES=431, PETRI_TRANSITIONS=664} [2024-06-03 20:13:08,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 20:13:08,883 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 664 transitions, 10783 flow [2024-06-03 20:13:08,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:08,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:08,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:08,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:13:08,883 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:08,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:08,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1193208831, now seen corresponding path program 5 times [2024-06-03 20:13:08,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:08,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842039732] [2024-06-03 20:13:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:08,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:09,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:09,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842039732] [2024-06-03 20:13:09,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842039732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:09,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:09,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:09,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682008209] [2024-06-03 20:13:09,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:09,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:09,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:09,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:09,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:09,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 664 transitions, 10783 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:09,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:09,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:09,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:12,134 INFO L124 PetriNetUnfolderBase]: 5464/8237 cut-off events. [2024-06-03 20:13:12,134 INFO L125 PetriNetUnfolderBase]: For 1550619/1550619 co-relation queries the response was YES. [2024-06-03 20:13:12,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86714 conditions, 8237 events. 5464/8237 cut-off events. For 1550619/1550619 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46623 event pairs, 1197 based on Foata normal form. 4/8239 useless extension candidates. Maximal degree in co-relation 86519. Up to 7848 conditions per place. [2024-06-03 20:13:12,280 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 585 selfloop transitions, 116 changer transitions 0/704 dead transitions. [2024-06-03 20:13:12,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 704 transitions, 13155 flow [2024-06-03 20:13:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:13:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:13:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-03 20:13:12,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-03 20:13:12,281 INFO L175 Difference]: Start difference. First operand has 431 places, 664 transitions, 10783 flow. Second operand 10 states and 171 transitions. [2024-06-03 20:13:12,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 704 transitions, 13155 flow [2024-06-03 20:13:17,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 704 transitions, 13013 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:17,444 INFO L231 Difference]: Finished difference. Result has 436 places, 670 transitions, 11057 flow [2024-06-03 20:13:17,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10641, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11057, PETRI_PLACES=436, PETRI_TRANSITIONS=670} [2024-06-03 20:13:17,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-03 20:13:17,444 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 670 transitions, 11057 flow [2024-06-03 20:13:17,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:17,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:17,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:17,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:13:17,445 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:17,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:17,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1765208740, now seen corresponding path program 1 times [2024-06-03 20:13:17,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:17,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740380910] [2024-06-03 20:13:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:17,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:18,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:18,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740380910] [2024-06-03 20:13:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740380910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:18,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:18,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:18,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550109115] [2024-06-03 20:13:18,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:18,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:18,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:18,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:18,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 670 transitions, 11057 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:18,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:18,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:18,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:20,558 INFO L124 PetriNetUnfolderBase]: 5461/8232 cut-off events. [2024-06-03 20:13:20,558 INFO L125 PetriNetUnfolderBase]: For 1552372/1552372 co-relation queries the response was YES. [2024-06-03 20:13:20,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86993 conditions, 8232 events. 5461/8232 cut-off events. For 1552372/1552372 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46629 event pairs, 1120 based on Foata normal form. 1/8231 useless extension candidates. Maximal degree in co-relation 86797. Up to 8007 conditions per place. [2024-06-03 20:13:20,704 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 621 selfloop transitions, 72 changer transitions 0/696 dead transitions. [2024-06-03 20:13:20,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 696 transitions, 12763 flow [2024-06-03 20:13:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:13:20,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:13:20,706 INFO L175 Difference]: Start difference. First operand has 436 places, 670 transitions, 11057 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:13:20,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 696 transitions, 12763 flow [2024-06-03 20:13:25,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 696 transitions, 12498 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-03 20:13:25,709 INFO L231 Difference]: Finished difference. Result has 438 places, 670 transitions, 10948 flow [2024-06-03 20:13:25,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10792, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10948, PETRI_PLACES=438, PETRI_TRANSITIONS=670} [2024-06-03 20:13:25,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-03 20:13:25,710 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 670 transitions, 10948 flow [2024-06-03 20:13:25,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:25,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:25,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:25,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:13:25,710 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:25,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:25,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1510144150, now seen corresponding path program 2 times [2024-06-03 20:13:25,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:25,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419542898] [2024-06-03 20:13:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:25,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:26,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:26,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419542898] [2024-06-03 20:13:26,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419542898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:26,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:26,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:26,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068332652] [2024-06-03 20:13:26,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:26,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:26,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:26,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:26,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:26,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:26,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 670 transitions, 10948 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:26,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:26,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:26,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:29,237 INFO L124 PetriNetUnfolderBase]: 5466/8241 cut-off events. [2024-06-03 20:13:29,237 INFO L125 PetriNetUnfolderBase]: For 1577702/1577702 co-relation queries the response was YES. [2024-06-03 20:13:29,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87130 conditions, 8241 events. 5466/8241 cut-off events. For 1577702/1577702 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46720 event pairs, 1217 based on Foata normal form. 1/8240 useless extension candidates. Maximal degree in co-relation 86932. Up to 8104 conditions per place. [2024-06-03 20:13:29,393 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 642 selfloop transitions, 49 changer transitions 0/694 dead transitions. [2024-06-03 20:13:29,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 694 transitions, 12464 flow [2024-06-03 20:13:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:13:29,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:13:29,394 INFO L175 Difference]: Start difference. First operand has 438 places, 670 transitions, 10948 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:13:29,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 694 transitions, 12464 flow [2024-06-03 20:13:36,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 694 transitions, 12255 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 20:13:36,180 INFO L231 Difference]: Finished difference. Result has 438 places, 673 transitions, 10909 flow [2024-06-03 20:13:36,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10751, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10909, PETRI_PLACES=438, PETRI_TRANSITIONS=673} [2024-06-03 20:13:36,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-03 20:13:36,181 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 673 transitions, 10909 flow [2024-06-03 20:13:36,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:36,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:36,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:36,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:13:36,182 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:36,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:36,182 INFO L85 PathProgramCache]: Analyzing trace with hash -828473555, now seen corresponding path program 1 times [2024-06-03 20:13:36,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:36,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791010087] [2024-06-03 20:13:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:36,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:36,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:36,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791010087] [2024-06-03 20:13:36,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791010087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:36,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:36,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:13:36,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807394103] [2024-06-03 20:13:36,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:36,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:13:36,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:13:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:13:37,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:37,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 673 transitions, 10909 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:37,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:37,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:37,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:39,114 INFO L124 PetriNetUnfolderBase]: 5508/8299 cut-off events. [2024-06-03 20:13:39,114 INFO L125 PetriNetUnfolderBase]: For 1607590/1607596 co-relation queries the response was YES. [2024-06-03 20:13:39,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88001 conditions, 8299 events. 5508/8299 cut-off events. For 1607590/1607596 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 47057 event pairs, 1219 based on Foata normal form. 8/8303 useless extension candidates. Maximal degree in co-relation 87803. Up to 8034 conditions per place. [2024-06-03 20:13:39,270 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 635 selfloop transitions, 69 changer transitions 0/707 dead transitions. [2024-06-03 20:13:39,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 707 transitions, 12848 flow [2024-06-03 20:13:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 20:13:39,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:13:39,272 INFO L175 Difference]: Start difference. First operand has 438 places, 673 transitions, 10909 flow. Second operand 8 states and 132 transitions. [2024-06-03 20:13:39,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 707 transitions, 12848 flow [2024-06-03 20:13:46,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 707 transitions, 12736 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:13:46,748 INFO L231 Difference]: Finished difference. Result has 440 places, 682 transitions, 11177 flow [2024-06-03 20:13:46,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10799, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11177, PETRI_PLACES=440, PETRI_TRANSITIONS=682} [2024-06-03 20:13:46,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-03 20:13:46,749 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 682 transitions, 11177 flow [2024-06-03 20:13:46,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:46,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:46,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:46,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:13:46,750 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:46,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash 446327163, now seen corresponding path program 2 times [2024-06-03 20:13:46,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:46,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650571426] [2024-06-03 20:13:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:46,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:47,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:47,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650571426] [2024-06-03 20:13:47,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650571426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:47,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:47,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:47,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962669664] [2024-06-03 20:13:47,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:47,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:47,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:47,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:47,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:47,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:47,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 682 transitions, 11177 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:47,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:47,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:47,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:49,892 INFO L124 PetriNetUnfolderBase]: 5518/8311 cut-off events. [2024-06-03 20:13:49,892 INFO L125 PetriNetUnfolderBase]: For 1608955/1608955 co-relation queries the response was YES. [2024-06-03 20:13:50,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88446 conditions, 8311 events. 5518/8311 cut-off events. For 1608955/1608955 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 47134 event pairs, 1202 based on Foata normal form. 2/8311 useless extension candidates. Maximal degree in co-relation 88247. Up to 8111 conditions per place. [2024-06-03 20:13:50,050 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 644 selfloop transitions, 65 changer transitions 0/712 dead transitions. [2024-06-03 20:13:50,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 712 transitions, 12788 flow [2024-06-03 20:13:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:13:50,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:13:50,052 INFO L175 Difference]: Start difference. First operand has 440 places, 682 transitions, 11177 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:13:50,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 712 transitions, 12788 flow [2024-06-03 20:13:56,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 712 transitions, 12594 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:56,353 INFO L231 Difference]: Finished difference. Result has 445 places, 685 transitions, 11208 flow [2024-06-03 20:13:56,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11009, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11208, PETRI_PLACES=445, PETRI_TRANSITIONS=685} [2024-06-03 20:13:56,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-03 20:13:56,354 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 685 transitions, 11208 flow [2024-06-03 20:13:56,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:56,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:56,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:56,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:13:56,355 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:56,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1678247819, now seen corresponding path program 1 times [2024-06-03 20:13:56,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:56,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995438536] [2024-06-03 20:13:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:56,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:57,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995438536] [2024-06-03 20:13:57,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995438536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:57,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:57,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:57,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719497915] [2024-06-03 20:13:57,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:57,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:57,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:57,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:57,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:57,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:57,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 685 transitions, 11208 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:57,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:57,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:57,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:59,455 INFO L124 PetriNetUnfolderBase]: 5580/8397 cut-off events. [2024-06-03 20:13:59,455 INFO L125 PetriNetUnfolderBase]: For 1674739/1674739 co-relation queries the response was YES. [2024-06-03 20:13:59,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89882 conditions, 8397 events. 5580/8397 cut-off events. For 1674739/1674739 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47583 event pairs, 1136 based on Foata normal form. 4/8399 useless extension candidates. Maximal degree in co-relation 89681. Up to 7996 conditions per place. [2024-06-03 20:13:59,606 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 619 selfloop transitions, 110 changer transitions 0/732 dead transitions. [2024-06-03 20:13:59,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 732 transitions, 13259 flow [2024-06-03 20:13:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:13:59,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:13:59,608 INFO L175 Difference]: Start difference. First operand has 445 places, 685 transitions, 11208 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:13:59,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 732 transitions, 13259 flow [2024-06-03 20:14:07,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 732 transitions, 13097 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:07,370 INFO L231 Difference]: Finished difference. Result has 448 places, 700 transitions, 11536 flow [2024-06-03 20:14:07,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11046, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11536, PETRI_PLACES=448, PETRI_TRANSITIONS=700} [2024-06-03 20:14:07,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-03 20:14:07,371 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 700 transitions, 11536 flow [2024-06-03 20:14:07,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:07,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:07,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:07,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:14:07,372 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:07,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:07,372 INFO L85 PathProgramCache]: Analyzing trace with hash -651222065, now seen corresponding path program 3 times [2024-06-03 20:14:07,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:07,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949392713] [2024-06-03 20:14:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:07,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:08,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:08,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949392713] [2024-06-03 20:14:08,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949392713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:08,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:08,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:08,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492700910] [2024-06-03 20:14:08,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:08,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:08,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:08,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:08,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 700 transitions, 11536 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:08,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:08,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:08,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:10,718 INFO L124 PetriNetUnfolderBase]: 5590/8412 cut-off events. [2024-06-03 20:14:10,719 INFO L125 PetriNetUnfolderBase]: For 1700396/1700396 co-relation queries the response was YES. [2024-06-03 20:14:10,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91934 conditions, 8412 events. 5590/8412 cut-off events. For 1700396/1700396 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 47677 event pairs, 1209 based on Foata normal form. 2/8412 useless extension candidates. Maximal degree in co-relation 91731. Up to 8271 conditions per place. [2024-06-03 20:14:10,858 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 671 selfloop transitions, 52 changer transitions 0/726 dead transitions. [2024-06-03 20:14:10,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 726 transitions, 13137 flow [2024-06-03 20:14:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-03 20:14:10,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-03 20:14:10,859 INFO L175 Difference]: Start difference. First operand has 448 places, 700 transitions, 11536 flow. Second operand 9 states and 139 transitions. [2024-06-03 20:14:10,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 726 transitions, 13137 flow [2024-06-03 20:14:19,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 726 transitions, 12991 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:19,490 INFO L231 Difference]: Finished difference. Result has 454 places, 703 transitions, 11577 flow [2024-06-03 20:14:19,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11398, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11577, PETRI_PLACES=454, PETRI_TRANSITIONS=703} [2024-06-03 20:14:19,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-03 20:14:19,491 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 703 transitions, 11577 flow [2024-06-03 20:14:19,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:19,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:19,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:19,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:14:19,492 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:19,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1500879149, now seen corresponding path program 2 times [2024-06-03 20:14:19,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:19,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699633348] [2024-06-03 20:14:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:19,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:20,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699633348] [2024-06-03 20:14:20,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699633348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:20,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:20,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:20,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964648557] [2024-06-03 20:14:20,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:20,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:20,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:20,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:20,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:20,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 703 transitions, 11577 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:20,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:20,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:20,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:22,527 INFO L124 PetriNetUnfolderBase]: 5610/8440 cut-off events. [2024-06-03 20:14:22,527 INFO L125 PetriNetUnfolderBase]: For 1735969/1735969 co-relation queries the response was YES. [2024-06-03 20:14:22,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90756 conditions, 8440 events. 5610/8440 cut-off events. For 1735969/1735969 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 47925 event pairs, 1241 based on Foata normal form. 4/8442 useless extension candidates. Maximal degree in co-relation 90551. Up to 8168 conditions per place. [2024-06-03 20:14:22,676 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 636 selfloop transitions, 94 changer transitions 0/733 dead transitions. [2024-06-03 20:14:22,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 733 transitions, 13219 flow [2024-06-03 20:14:22,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-03 20:14:22,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-03 20:14:22,678 INFO L175 Difference]: Start difference. First operand has 454 places, 703 transitions, 11577 flow. Second operand 9 states and 146 transitions. [2024-06-03 20:14:22,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 733 transitions, 13219 flow [2024-06-03 20:14:32,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 733 transitions, 13093 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:32,063 INFO L231 Difference]: Finished difference. Result has 457 places, 708 transitions, 11729 flow [2024-06-03 20:14:32,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11451, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11729, PETRI_PLACES=457, PETRI_TRANSITIONS=708} [2024-06-03 20:14:32,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-03 20:14:32,063 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 708 transitions, 11729 flow [2024-06-03 20:14:32,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:32,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:32,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:32,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:14:32,064 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:32,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:32,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1501116299, now seen corresponding path program 3 times [2024-06-03 20:14:32,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:32,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544767758] [2024-06-03 20:14:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:32,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:32,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:32,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544767758] [2024-06-03 20:14:32,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544767758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:32,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:32,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:32,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904026953] [2024-06-03 20:14:32,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:32,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:32,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:32,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:32,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:32,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:32,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 708 transitions, 11729 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:32,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:32,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:32,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:35,398 INFO L124 PetriNetUnfolderBase]: 5630/8468 cut-off events. [2024-06-03 20:14:35,399 INFO L125 PetriNetUnfolderBase]: For 1766077/1766077 co-relation queries the response was YES. [2024-06-03 20:14:35,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91406 conditions, 8468 events. 5630/8468 cut-off events. For 1766077/1766077 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 48017 event pairs, 1165 based on Foata normal form. 4/8470 useless extension candidates. Maximal degree in co-relation 91200. Up to 8174 conditions per place. [2024-06-03 20:14:35,531 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 636 selfloop transitions, 99 changer transitions 0/738 dead transitions. [2024-06-03 20:14:35,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 738 transitions, 13385 flow [2024-06-03 20:14:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:14:35,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:14:35,532 INFO L175 Difference]: Start difference. First operand has 457 places, 708 transitions, 11729 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:14:35,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 738 transitions, 13385 flow [2024-06-03 20:14:42,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 738 transitions, 13146 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:42,197 INFO L231 Difference]: Finished difference. Result has 460 places, 711 transitions, 11766 flow [2024-06-03 20:14:42,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11490, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11766, PETRI_PLACES=460, PETRI_TRANSITIONS=711} [2024-06-03 20:14:42,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-03 20:14:42,198 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 711 transitions, 11766 flow [2024-06-03 20:14:42,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:42,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:42,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:42,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:14:42,198 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:42,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1815264785, now seen corresponding path program 1 times [2024-06-03 20:14:42,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:42,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337584909] [2024-06-03 20:14:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:42,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:43,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:43,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337584909] [2024-06-03 20:14:43,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337584909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:43,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:43,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:14:43,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704324777] [2024-06-03 20:14:43,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:43,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:14:43,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:14:43,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:14:43,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:43,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 711 transitions, 11766 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:43,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:43,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:43,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:45,752 INFO L124 PetriNetUnfolderBase]: 5704/8583 cut-off events. [2024-06-03 20:14:45,752 INFO L125 PetriNetUnfolderBase]: For 1877933/1877933 co-relation queries the response was YES. [2024-06-03 20:14:45,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93499 conditions, 8583 events. 5704/8583 cut-off events. For 1877933/1877933 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 48814 event pairs, 1082 based on Foata normal form. 8/8589 useless extension candidates. Maximal degree in co-relation 93292. Up to 8048 conditions per place. [2024-06-03 20:14:45,907 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 661 selfloop transitions, 87 changer transitions 0/751 dead transitions. [2024-06-03 20:14:45,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 751 transitions, 13786 flow [2024-06-03 20:14:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:14:45,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:14:45,908 INFO L175 Difference]: Start difference. First operand has 460 places, 711 transitions, 11766 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:14:45,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 751 transitions, 13786 flow [2024-06-03 20:14:53,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 751 transitions, 13538 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:53,750 INFO L231 Difference]: Finished difference. Result has 462 places, 713 transitions, 11762 flow [2024-06-03 20:14:53,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11518, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11762, PETRI_PLACES=462, PETRI_TRANSITIONS=713} [2024-06-03 20:14:53,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-03 20:14:53,751 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 713 transitions, 11762 flow [2024-06-03 20:14:53,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:53,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:53,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:53,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:14:53,760 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:53,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1039306675, now seen corresponding path program 2 times [2024-06-03 20:14:53,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:53,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213239139] [2024-06-03 20:14:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:53,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:54,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:54,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213239139] [2024-06-03 20:14:54,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213239139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:54,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:54,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:14:54,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785672995] [2024-06-03 20:14:54,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:54,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:14:54,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:14:54,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:14:54,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:54,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 713 transitions, 11762 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:54,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:54,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:54,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:57,496 INFO L124 PetriNetUnfolderBase]: 5804/8735 cut-off events. [2024-06-03 20:14:57,496 INFO L125 PetriNetUnfolderBase]: For 1996180/1996180 co-relation queries the response was YES. [2024-06-03 20:14:57,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96469 conditions, 8735 events. 5804/8735 cut-off events. For 1996180/1996180 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49966 event pairs, 1272 based on Foata normal form. 8/8741 useless extension candidates. Maximal degree in co-relation 96261. Up to 8358 conditions per place. [2024-06-03 20:14:57,647 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 663 selfloop transitions, 85 changer transitions 0/751 dead transitions. [2024-06-03 20:14:57,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 751 transitions, 13788 flow [2024-06-03 20:14:57,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:14:57,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-03 20:14:57,648 INFO L175 Difference]: Start difference. First operand has 462 places, 713 transitions, 11762 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:14:57,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 751 transitions, 13788 flow [2024-06-03 20:15:06,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 751 transitions, 13666 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:06,437 INFO L231 Difference]: Finished difference. Result has 466 places, 715 transitions, 11884 flow [2024-06-03 20:15:06,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11644, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11884, PETRI_PLACES=466, PETRI_TRANSITIONS=715} [2024-06-03 20:15:06,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-03 20:15:06,438 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 715 transitions, 11884 flow [2024-06-03 20:15:06,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:06,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:06,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:06,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:15:06,438 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:06,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:06,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1039315975, now seen corresponding path program 3 times [2024-06-03 20:15:06,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:06,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321113082] [2024-06-03 20:15:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:06,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:07,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:07,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321113082] [2024-06-03 20:15:07,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321113082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:07,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:07,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:07,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978553951] [2024-06-03 20:15:07,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:07,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:07,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:07,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:07,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:07,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:07,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 715 transitions, 11884 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:07,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:07,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:07,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:10,273 INFO L124 PetriNetUnfolderBase]: 5776/8695 cut-off events. [2024-06-03 20:15:10,273 INFO L125 PetriNetUnfolderBase]: For 1971667/1971667 co-relation queries the response was YES. [2024-06-03 20:15:10,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95071 conditions, 8695 events. 5776/8695 cut-off events. For 1971667/1971667 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49676 event pairs, 1210 based on Foata normal form. 12/8705 useless extension candidates. Maximal degree in co-relation 94861. Up to 8384 conditions per place. [2024-06-03 20:15:10,442 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 659 selfloop transitions, 84 changer transitions 0/746 dead transitions. [2024-06-03 20:15:10,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 746 transitions, 13554 flow [2024-06-03 20:15:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:15:10,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:15:10,443 INFO L175 Difference]: Start difference. First operand has 466 places, 715 transitions, 11884 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:15:10,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 746 transitions, 13554 flow [2024-06-03 20:15:18,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 746 transitions, 13423 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:18,030 INFO L231 Difference]: Finished difference. Result has 470 places, 715 transitions, 11926 flow [2024-06-03 20:15:18,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11753, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11926, PETRI_PLACES=470, PETRI_TRANSITIONS=715} [2024-06-03 20:15:18,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-03 20:15:18,046 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 715 transitions, 11926 flow [2024-06-03 20:15:18,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:18,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:18,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:18,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:15:18,046 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:18,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:18,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1895658295, now seen corresponding path program 4 times [2024-06-03 20:15:18,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:18,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445281077] [2024-06-03 20:15:18,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:18,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:18,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:18,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445281077] [2024-06-03 20:15:18,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445281077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:18,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:18,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:15:18,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85679814] [2024-06-03 20:15:18,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:18,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:15:18,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:18,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:15:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:15:18,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:18,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 715 transitions, 11926 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:18,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:18,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:18,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:21,478 INFO L124 PetriNetUnfolderBase]: 5866/8820 cut-off events. [2024-06-03 20:15:21,478 INFO L125 PetriNetUnfolderBase]: For 2004892/2004894 co-relation queries the response was YES. [2024-06-03 20:15:21,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97729 conditions, 8820 events. 5866/8820 cut-off events. For 2004892/2004894 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 50455 event pairs, 1119 based on Foata normal form. 4/8819 useless extension candidates. Maximal degree in co-relation 97517. Up to 7622 conditions per place. [2024-06-03 20:15:21,652 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 533 selfloop transitions, 227 changer transitions 0/763 dead transitions. [2024-06-03 20:15:21,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 763 transitions, 14790 flow [2024-06-03 20:15:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:15:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:15:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:15:21,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-03 20:15:21,653 INFO L175 Difference]: Start difference. First operand has 470 places, 715 transitions, 11926 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:15:21,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 763 transitions, 14790 flow [2024-06-03 20:15:29,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 763 transitions, 14617 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:29,719 INFO L231 Difference]: Finished difference. Result has 472 places, 736 transitions, 12845 flow [2024-06-03 20:15:29,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11753, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12845, PETRI_PLACES=472, PETRI_TRANSITIONS=736} [2024-06-03 20:15:29,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-03 20:15:29,720 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 736 transitions, 12845 flow [2024-06-03 20:15:29,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:29,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:29,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:29,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:15:29,721 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:29,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:29,721 INFO L85 PathProgramCache]: Analyzing trace with hash -274613677, now seen corresponding path program 4 times [2024-06-03 20:15:29,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:29,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653298149] [2024-06-03 20:15:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:29,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:30,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:30,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653298149] [2024-06-03 20:15:30,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653298149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:30,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:30,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:30,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655596874] [2024-06-03 20:15:30,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:30,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:30,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:30,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:30,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:30,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:30,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 736 transitions, 12845 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:30,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:30,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:30,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:33,311 INFO L124 PetriNetUnfolderBase]: 5942/8922 cut-off events. [2024-06-03 20:15:33,312 INFO L125 PetriNetUnfolderBase]: For 2107748/2107748 co-relation queries the response was YES. [2024-06-03 20:15:33,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101251 conditions, 8922 events. 5942/8922 cut-off events. For 2107748/2107748 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 51001 event pairs, 1202 based on Foata normal form. 4/8924 useless extension candidates. Maximal degree in co-relation 101036. Up to 8178 conditions per place. [2024-06-03 20:15:33,476 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 611 selfloop transitions, 165 changer transitions 0/779 dead transitions. [2024-06-03 20:15:33,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 779 transitions, 15351 flow [2024-06-03 20:15:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:15:33,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:15:33,478 INFO L175 Difference]: Start difference. First operand has 472 places, 736 transitions, 12845 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:15:33,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 779 transitions, 15351 flow [2024-06-03 20:15:41,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 779 transitions, 15154 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-03 20:15:41,540 INFO L231 Difference]: Finished difference. Result has 480 places, 746 transitions, 13425 flow [2024-06-03 20:15:41,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12648, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13425, PETRI_PLACES=480, PETRI_TRANSITIONS=746} [2024-06-03 20:15:41,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-03 20:15:41,541 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 746 transitions, 13425 flow [2024-06-03 20:15:41,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:41,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:41,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:41,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:15:41,541 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:41,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:41,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1895778265, now seen corresponding path program 5 times [2024-06-03 20:15:41,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:41,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117824828] [2024-06-03 20:15:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:41,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:42,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:42,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117824828] [2024-06-03 20:15:42,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117824828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:42,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:42,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:42,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034755544] [2024-06-03 20:15:42,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:42,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:42,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:42,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:42,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:42,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:42,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 746 transitions, 13425 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:42,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:42,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:42,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:45,628 INFO L124 PetriNetUnfolderBase]: 5952/8936 cut-off events. [2024-06-03 20:15:45,628 INFO L125 PetriNetUnfolderBase]: For 2133248/2133248 co-relation queries the response was YES. [2024-06-03 20:15:45,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102738 conditions, 8936 events. 5952/8936 cut-off events. For 2133248/2133248 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 51108 event pairs, 1231 based on Foata normal form. 2/8936 useless extension candidates. Maximal degree in co-relation 102520. Up to 8624 conditions per place. [2024-06-03 20:15:45,777 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 675 selfloop transitions, 98 changer transitions 0/776 dead transitions. [2024-06-03 20:15:45,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 776 transitions, 15386 flow [2024-06-03 20:15:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 20:15:45,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-03 20:15:45,779 INFO L175 Difference]: Start difference. First operand has 480 places, 746 transitions, 13425 flow. Second operand 9 states and 145 transitions. [2024-06-03 20:15:45,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 776 transitions, 15386 flow [2024-06-03 20:15:53,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 776 transitions, 15145 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-03 20:15:53,222 INFO L231 Difference]: Finished difference. Result has 485 places, 749 transitions, 13461 flow [2024-06-03 20:15:53,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13184, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13461, PETRI_PLACES=485, PETRI_TRANSITIONS=749} [2024-06-03 20:15:53,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-03 20:15:53,223 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 749 transitions, 13461 flow [2024-06-03 20:15:53,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:53,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:53,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:53,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:15:53,223 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:53,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1901020675, now seen corresponding path program 6 times [2024-06-03 20:15:53,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:53,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216108528] [2024-06-03 20:15:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:53,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:53,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:53,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216108528] [2024-06-03 20:15:53,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216108528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:53,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:53,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:15:53,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188246265] [2024-06-03 20:15:53,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:53,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:15:53,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:53,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:15:53,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:15:54,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:54,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 749 transitions, 13461 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:54,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:54,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:54,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:57,156 INFO L124 PetriNetUnfolderBase]: 5972/8967 cut-off events. [2024-06-03 20:15:57,156 INFO L125 PetriNetUnfolderBase]: For 2172660/2172662 co-relation queries the response was YES. [2024-06-03 20:15:57,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102646 conditions, 8967 events. 5972/8967 cut-off events. For 2172660/2172662 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 51336 event pairs, 1181 based on Foata normal form. 6/8968 useless extension candidates. Maximal degree in co-relation 102426. Up to 7749 conditions per place. [2024-06-03 20:15:57,307 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 538 selfloop transitions, 239 changer transitions 0/780 dead transitions. [2024-06-03 20:15:57,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 780 transitions, 15971 flow [2024-06-03 20:15:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:15:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:15:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:15:57,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-03 20:15:57,308 INFO L175 Difference]: Start difference. First operand has 485 places, 749 transitions, 13461 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:15:57,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 780 transitions, 15971 flow [2024-06-03 20:16:07,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 780 transitions, 15731 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:16:07,059 INFO L231 Difference]: Finished difference. Result has 486 places, 753 transitions, 13802 flow [2024-06-03 20:16:07,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13221, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13802, PETRI_PLACES=486, PETRI_TRANSITIONS=753} [2024-06-03 20:16:07,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-03 20:16:07,060 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 753 transitions, 13802 flow [2024-06-03 20:16:07,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:07,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:07,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:07,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:16:07,060 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:07,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1537461625, now seen corresponding path program 7 times [2024-06-03 20:16:07,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:07,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652256644] [2024-06-03 20:16:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:07,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:07,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:07,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652256644] [2024-06-03 20:16:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652256644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:07,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:07,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:07,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798366936] [2024-06-03 20:16:07,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:07,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:07,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:07,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:07,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:07,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:16:07,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 753 transitions, 13802 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:07,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:07,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:16:07,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:10,894 INFO L124 PetriNetUnfolderBase]: 6016/9029 cut-off events. [2024-06-03 20:16:10,894 INFO L125 PetriNetUnfolderBase]: For 2233263/2233277 co-relation queries the response was YES. [2024-06-03 20:16:11,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104626 conditions, 9029 events. 6016/9029 cut-off events. For 2233263/2233277 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51680 event pairs, 1183 based on Foata normal form. 9/9032 useless extension candidates. Maximal degree in co-relation 104405. Up to 7786 conditions per place. [2024-06-03 20:16:11,061 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 545 selfloop transitions, 237 changer transitions 0/785 dead transitions. [2024-06-03 20:16:11,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 785 transitions, 16433 flow [2024-06-03 20:16:11,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:16:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:16:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:16:11,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:16:11,062 INFO L175 Difference]: Start difference. First operand has 486 places, 753 transitions, 13802 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:16:11,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 785 transitions, 16433 flow [2024-06-03 20:16:21,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 785 transitions, 15760 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 20:16:21,366 INFO L231 Difference]: Finished difference. Result has 488 places, 760 transitions, 13793 flow [2024-06-03 20:16:21,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13155, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13793, PETRI_PLACES=488, PETRI_TRANSITIONS=760} [2024-06-03 20:16:21,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-03 20:16:21,367 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 760 transitions, 13793 flow [2024-06-03 20:16:21,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:21,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:21,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:21,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:16:21,367 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:21,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:21,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1541175301, now seen corresponding path program 5 times [2024-06-03 20:16:21,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:21,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216642522] [2024-06-03 20:16:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:21,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:22,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:22,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216642522] [2024-06-03 20:16:22,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216642522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:22,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:22,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:16:22,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270686738] [2024-06-03 20:16:22,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:22,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:16:22,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:22,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:16:22,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:16:22,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:16:22,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 760 transitions, 13793 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:22,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:22,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:16:22,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:25,249 INFO L124 PetriNetUnfolderBase]: 6084/9119 cut-off events. [2024-06-03 20:16:25,249 INFO L125 PetriNetUnfolderBase]: For 2307602/2307602 co-relation queries the response was YES. [2024-06-03 20:16:25,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106257 conditions, 9119 events. 6084/9119 cut-off events. For 2307602/2307602 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 52200 event pairs, 1186 based on Foata normal form. 4/9121 useless extension candidates. Maximal degree in co-relation 106035. Up to 8336 conditions per place. [2024-06-03 20:16:25,561 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 629 selfloop transitions, 169 changer transitions 0/801 dead transitions. [2024-06-03 20:16:25,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 801 transitions, 16474 flow [2024-06-03 20:16:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:16:25,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:16:25,562 INFO L175 Difference]: Start difference. First operand has 488 places, 760 transitions, 13793 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:16:25,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 801 transitions, 16474 flow [2024-06-03 20:16:34,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 801 transitions, 16064 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 20:16:34,677 INFO L231 Difference]: Finished difference. Result has 493 places, 769 transitions, 13922 flow [2024-06-03 20:16:34,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13383, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13922, PETRI_PLACES=493, PETRI_TRANSITIONS=769} [2024-06-03 20:16:34,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-03 20:16:34,679 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 769 transitions, 13922 flow [2024-06-03 20:16:34,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:34,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:34,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:34,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:16:34,679 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:34,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:34,680 INFO L85 PathProgramCache]: Analyzing trace with hash 408868599, now seen corresponding path program 8 times [2024-06-03 20:16:34,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:34,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17278626] [2024-06-03 20:16:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:34,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:35,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:35,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17278626] [2024-06-03 20:16:35,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17278626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:35,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:35,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:16:35,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643779070] [2024-06-03 20:16:35,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:35,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:16:35,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:35,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:16:35,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:16:35,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:16:35,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 769 transitions, 13922 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:35,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:35,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:16:35,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:38,838 INFO L124 PetriNetUnfolderBase]: 6158/9221 cut-off events. [2024-06-03 20:16:38,838 INFO L125 PetriNetUnfolderBase]: For 2389107/2389107 co-relation queries the response was YES. [2024-06-03 20:16:38,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108229 conditions, 9221 events. 6158/9221 cut-off events. For 2389107/2389107 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 52778 event pairs, 1218 based on Foata normal form. 2/9221 useless extension candidates. Maximal degree in co-relation 108006. Up to 8835 conditions per place. [2024-06-03 20:16:39,146 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 694 selfloop transitions, 116 changer transitions 0/813 dead transitions. [2024-06-03 20:16:39,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 813 transitions, 16734 flow [2024-06-03 20:16:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:16:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:16:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-03 20:16:39,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37915742793791574 [2024-06-03 20:16:39,169 INFO L175 Difference]: Start difference. First operand has 493 places, 769 transitions, 13922 flow. Second operand 11 states and 171 transitions. [2024-06-03 20:16:39,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 813 transitions, 16734 flow [2024-06-03 20:16:49,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 813 transitions, 16464 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 20:16:49,382 INFO L231 Difference]: Finished difference. Result has 502 places, 782 transitions, 14242 flow [2024-06-03 20:16:49,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13652, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14242, PETRI_PLACES=502, PETRI_TRANSITIONS=782} [2024-06-03 20:16:49,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-03 20:16:49,383 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 782 transitions, 14242 flow [2024-06-03 20:16:49,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:49,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:49,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:49,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:16:49,383 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:49,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash 408879945, now seen corresponding path program 6 times [2024-06-03 20:16:49,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:49,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324065713] [2024-06-03 20:16:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:49,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:50,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:50,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324065713] [2024-06-03 20:16:50,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324065713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:50,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:50,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:16:50,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743157145] [2024-06-03 20:16:50,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:50,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:16:50,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:50,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:16:50,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:16:50,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:16:50,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 782 transitions, 14242 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:50,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:50,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:16:50,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:53,209 INFO L124 PetriNetUnfolderBase]: 6146/9205 cut-off events. [2024-06-03 20:16:53,209 INFO L125 PetriNetUnfolderBase]: For 2413667/2413667 co-relation queries the response was YES. [2024-06-03 20:16:53,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107718 conditions, 9205 events. 6146/9205 cut-off events. For 2413667/2413667 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 52701 event pairs, 1199 based on Foata normal form. 4/9207 useless extension candidates. Maximal degree in co-relation 107492. Up to 8430 conditions per place. [2024-06-03 20:16:53,522 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 637 selfloop transitions, 172 changer transitions 0/812 dead transitions. [2024-06-03 20:16:53,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 812 transitions, 16500 flow [2024-06-03 20:16:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 20:16:53,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-03 20:16:53,523 INFO L175 Difference]: Start difference. First operand has 502 places, 782 transitions, 14242 flow. Second operand 9 states and 152 transitions. [2024-06-03 20:16:53,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 812 transitions, 16500 flow [2024-06-03 20:17:05,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 812 transitions, 16162 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-03 20:17:05,221 INFO L231 Difference]: Finished difference. Result has 504 places, 782 transitions, 14254 flow [2024-06-03 20:17:05,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13904, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14254, PETRI_PLACES=504, PETRI_TRANSITIONS=782} [2024-06-03 20:17:05,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-03 20:17:05,221 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 782 transitions, 14254 flow [2024-06-03 20:17:05,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:05,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:05,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:05,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:17:05,222 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:05,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash 408874396, now seen corresponding path program 1 times [2024-06-03 20:17:05,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:05,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450920976] [2024-06-03 20:17:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:05,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:06,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:06,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450920976] [2024-06-03 20:17:06,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450920976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:06,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:06,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:06,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489227330] [2024-06-03 20:17:06,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:06,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:06,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:06,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:06,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:17:06,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 782 transitions, 14254 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:06,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:06,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:17:06,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:09,286 INFO L124 PetriNetUnfolderBase]: 6143/9202 cut-off events. [2024-06-03 20:17:09,286 INFO L125 PetriNetUnfolderBase]: For 2417029/2417029 co-relation queries the response was YES. [2024-06-03 20:17:09,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107822 conditions, 9202 events. 6143/9202 cut-off events. For 2417029/2417029 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 52710 event pairs, 1325 based on Foata normal form. 1/9201 useless extension candidates. Maximal degree in co-relation 107595. Up to 9116 conditions per place. [2024-06-03 20:17:09,442 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 759 selfloop transitions, 39 changer transitions 0/801 dead transitions. [2024-06-03 20:17:09,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 801 transitions, 15916 flow [2024-06-03 20:17:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:17:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:17:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-03 20:17:09,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-03 20:17:09,444 INFO L175 Difference]: Start difference. First operand has 504 places, 782 transitions, 14254 flow. Second operand 9 states and 133 transitions. [2024-06-03 20:17:09,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 801 transitions, 15916 flow [2024-06-03 20:17:19,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 801 transitions, 15677 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:17:19,892 INFO L231 Difference]: Finished difference. Result has 507 places, 782 transitions, 14099 flow [2024-06-03 20:17:19,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14015, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14099, PETRI_PLACES=507, PETRI_TRANSITIONS=782} [2024-06-03 20:17:19,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-03 20:17:19,893 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 782 transitions, 14099 flow [2024-06-03 20:17:19,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:19,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:19,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:19,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:17:19,894 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:19,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:19,894 INFO L85 PathProgramCache]: Analyzing trace with hash 408880131, now seen corresponding path program 1 times [2024-06-03 20:17:19,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:19,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694814005] [2024-06-03 20:17:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:19,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:20,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:20,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694814005] [2024-06-03 20:17:20,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694814005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:20,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:20,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:20,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904549211] [2024-06-03 20:17:20,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:20,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:20,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:20,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:17:20,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 782 transitions, 14099 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:20,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:20,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:17:20,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:24,017 INFO L124 PetriNetUnfolderBase]: 6153/9216 cut-off events. [2024-06-03 20:17:24,017 INFO L125 PetriNetUnfolderBase]: For 2458912/2458912 co-relation queries the response was YES. [2024-06-03 20:17:24,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107778 conditions, 9216 events. 6153/9216 cut-off events. For 2458912/2458912 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 52824 event pairs, 1332 based on Foata normal form. 2/9216 useless extension candidates. Maximal degree in co-relation 107550. Up to 9080 conditions per place. [2024-06-03 20:17:24,326 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 743 selfloop transitions, 61 changer transitions 0/807 dead transitions. [2024-06-03 20:17:24,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 807 transitions, 15883 flow [2024-06-03 20:17:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:17:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:17:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-03 20:17:24,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-03 20:17:24,328 INFO L175 Difference]: Start difference. First operand has 507 places, 782 transitions, 14099 flow. Second operand 9 states and 139 transitions. [2024-06-03 20:17:24,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 807 transitions, 15883 flow [2024-06-03 20:17:35,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 807 transitions, 15787 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:17:35,952 INFO L231 Difference]: Finished difference. Result has 509 places, 785 transitions, 14217 flow [2024-06-03 20:17:35,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14003, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14217, PETRI_PLACES=509, PETRI_TRANSITIONS=785} [2024-06-03 20:17:35,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-03 20:17:35,953 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 785 transitions, 14217 flow [2024-06-03 20:17:35,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:35,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:35,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:35,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:17:35,953 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:35,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1540034229, now seen corresponding path program 2 times [2024-06-03 20:17:35,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:35,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583959235] [2024-06-03 20:17:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:35,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:36,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583959235] [2024-06-03 20:17:36,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583959235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:36,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:36,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:36,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885893099] [2024-06-03 20:17:36,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:36,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:36,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:36,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:17:36,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 785 transitions, 14217 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:36,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:36,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:17:36,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:40,092 INFO L124 PetriNetUnfolderBase]: 6163/9230 cut-off events. [2024-06-03 20:17:40,093 INFO L125 PetriNetUnfolderBase]: For 2501019/2501019 co-relation queries the response was YES. [2024-06-03 20:17:40,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108322 conditions, 9230 events. 6163/9230 cut-off events. For 2501019/2501019 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 52880 event pairs, 1262 based on Foata normal form. 2/9230 useless extension candidates. Maximal degree in co-relation 108093. Up to 9085 conditions per place. [2024-06-03 20:17:40,283 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 742 selfloop transitions, 66 changer transitions 0/811 dead transitions. [2024-06-03 20:17:40,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 811 transitions, 16025 flow [2024-06-03 20:17:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:17:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:17:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-03 20:17:40,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-03 20:17:40,285 INFO L175 Difference]: Start difference. First operand has 509 places, 785 transitions, 14217 flow. Second operand 9 states and 142 transitions. [2024-06-03 20:17:40,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 811 transitions, 16025 flow [2024-06-03 20:17:51,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 811 transitions, 15843 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 20:17:51,309 INFO L231 Difference]: Finished difference. Result has 511 places, 788 transitions, 14265 flow [2024-06-03 20:17:51,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14035, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14265, PETRI_PLACES=511, PETRI_TRANSITIONS=788} [2024-06-03 20:17:51,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-03 20:17:51,310 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 788 transitions, 14265 flow [2024-06-03 20:17:51,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:51,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:51,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:51,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:17:51,311 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:51,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:51,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1540034601, now seen corresponding path program 9 times [2024-06-03 20:17:51,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:51,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134668133] [2024-06-03 20:17:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:52,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134668133] [2024-06-03 20:17:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134668133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:52,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:52,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:52,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223807573] [2024-06-03 20:17:52,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:52,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:52,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:52,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:52,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:17:52,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 788 transitions, 14265 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:52,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:52,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:17:52,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:55,377 INFO L124 PetriNetUnfolderBase]: 6151/9213 cut-off events. [2024-06-03 20:17:55,378 INFO L125 PetriNetUnfolderBase]: For 2519268/2519268 co-relation queries the response was YES. [2024-06-03 20:17:55,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107911 conditions, 9213 events. 6151/9213 cut-off events. For 2519268/2519268 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 52717 event pairs, 1194 based on Foata normal form. 4/9215 useless extension candidates. Maximal degree in co-relation 107681. Up to 8837 conditions per place. [2024-06-03 20:17:55,683 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 697 selfloop transitions, 114 changer transitions 0/814 dead transitions. [2024-06-03 20:17:55,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 814 transitions, 16531 flow [2024-06-03 20:17:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:17:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:17:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-03 20:17:55,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-03 20:17:55,685 INFO L175 Difference]: Start difference. First operand has 511 places, 788 transitions, 14265 flow. Second operand 9 states and 146 transitions. [2024-06-03 20:17:55,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 814 transitions, 16531 flow [2024-06-03 20:18:06,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 814 transitions, 16305 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:06,162 INFO L231 Difference]: Finished difference. Result has 513 places, 788 transitions, 14275 flow [2024-06-03 20:18:06,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14039, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14275, PETRI_PLACES=513, PETRI_TRANSITIONS=788} [2024-06-03 20:18:06,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-03 20:18:06,162 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 788 transitions, 14275 flow [2024-06-03 20:18:06,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:06,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:06,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:06,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:18:06,163 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:06,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -343919011, now seen corresponding path program 7 times [2024-06-03 20:18:06,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:06,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958432012] [2024-06-03 20:18:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:06,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:06,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:06,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958432012] [2024-06-03 20:18:06,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958432012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:06,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:06,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:06,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382568845] [2024-06-03 20:18:06,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:06,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:06,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:06,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:18:06,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 788 transitions, 14275 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:06,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:06,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:18:06,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:10,404 INFO L124 PetriNetUnfolderBase]: 6347/9483 cut-off events. [2024-06-03 20:18:10,404 INFO L125 PetriNetUnfolderBase]: For 2753829/2753829 co-relation queries the response was YES. [2024-06-03 20:18:10,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113668 conditions, 9483 events. 6347/9483 cut-off events. For 2753829/2753829 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 54409 event pairs, 1334 based on Foata normal form. 4/9485 useless extension candidates. Maximal degree in co-relation 113437. Up to 8993 conditions per place. [2024-06-03 20:18:10,573 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 715 selfloop transitions, 122 changer transitions 0/840 dead transitions. [2024-06-03 20:18:10,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 840 transitions, 17202 flow [2024-06-03 20:18:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:18:10,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:18:10,574 INFO L175 Difference]: Start difference. First operand has 513 places, 788 transitions, 14275 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:18:10,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 840 transitions, 17202 flow [2024-06-03 20:18:23,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 840 transitions, 16974 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:18:23,432 INFO L231 Difference]: Finished difference. Result has 514 places, 809 transitions, 14849 flow [2024-06-03 20:18:23,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14047, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14849, PETRI_PLACES=514, PETRI_TRANSITIONS=809} [2024-06-03 20:18:23,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-03 20:18:23,433 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 809 transitions, 14849 flow [2024-06-03 20:18:23,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:23,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:23,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:23,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:18:23,434 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:23,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1193813245, now seen corresponding path program 3 times [2024-06-03 20:18:23,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:23,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066433949] [2024-06-03 20:18:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:23,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:24,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:24,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066433949] [2024-06-03 20:18:24,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066433949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:24,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:24,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:24,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523949622] [2024-06-03 20:18:24,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:24,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:24,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:24,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:24,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:24,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:18:24,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 809 transitions, 14849 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:24,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:24,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:18:24,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:27,740 INFO L124 PetriNetUnfolderBase]: 6357/9498 cut-off events. [2024-06-03 20:18:27,740 INFO L125 PetriNetUnfolderBase]: For 2778161/2778161 co-relation queries the response was YES. [2024-06-03 20:18:27,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114350 conditions, 9498 events. 6357/9498 cut-off events. For 2778161/2778161 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 54534 event pairs, 1299 based on Foata normal form. 2/9498 useless extension candidates. Maximal degree in co-relation 114118. Up to 9412 conditions per place. [2024-06-03 20:18:27,914 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 787 selfloop transitions, 41 changer transitions 0/831 dead transitions. [2024-06-03 20:18:27,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 831 transitions, 16679 flow [2024-06-03 20:18:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-03 20:18:27,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-03 20:18:27,916 INFO L175 Difference]: Start difference. First operand has 514 places, 809 transitions, 14849 flow. Second operand 9 states and 136 transitions. [2024-06-03 20:18:27,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 831 transitions, 16679 flow [2024-06-03 20:18:41,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 831 transitions, 16438 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:41,793 INFO L231 Difference]: Finished difference. Result has 519 places, 812 transitions, 14794 flow [2024-06-03 20:18:41,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14608, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14794, PETRI_PLACES=519, PETRI_TRANSITIONS=812} [2024-06-03 20:18:41,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-03 20:18:41,794 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 812 transitions, 14794 flow [2024-06-03 20:18:41,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:41,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:41,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:41,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:18:41,794 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:41,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1197306511, now seen corresponding path program 8 times [2024-06-03 20:18:41,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:41,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352053281] [2024-06-03 20:18:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:41,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:42,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:42,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352053281] [2024-06-03 20:18:42,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352053281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:42,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:42,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43242549] [2024-06-03 20:18:42,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:42,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:42,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:18:42,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 812 transitions, 14794 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:42,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:42,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:18:42,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:46,030 INFO L124 PetriNetUnfolderBase]: 6377/9525 cut-off events. [2024-06-03 20:18:46,030 INFO L125 PetriNetUnfolderBase]: For 2834651/2834651 co-relation queries the response was YES. [2024-06-03 20:18:46,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114535 conditions, 9525 events. 6377/9525 cut-off events. For 2834651/2834651 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 54617 event pairs, 1323 based on Foata normal form. 4/9527 useless extension candidates. Maximal degree in co-relation 114301. Up to 9254 conditions per place. [2024-06-03 20:18:46,202 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 753 selfloop transitions, 85 changer transitions 0/841 dead transitions. [2024-06-03 20:18:46,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 841 transitions, 16685 flow [2024-06-03 20:18:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-03 20:18:46,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-03 20:18:46,203 INFO L175 Difference]: Start difference. First operand has 519 places, 812 transitions, 14794 flow. Second operand 9 states and 143 transitions. [2024-06-03 20:18:46,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 841 transitions, 16685 flow [2024-06-03 20:18:59,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 841 transitions, 16531 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:59,070 INFO L231 Difference]: Finished difference. Result has 521 places, 819 transitions, 14941 flow [2024-06-03 20:18:59,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14640, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14941, PETRI_PLACES=521, PETRI_TRANSITIONS=819} [2024-06-03 20:18:59,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-03 20:18:59,070 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 819 transitions, 14941 flow [2024-06-03 20:18:59,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:59,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:59,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:59,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:18:59,071 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:59,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1193819197, now seen corresponding path program 10 times [2024-06-03 20:18:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:59,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154014219] [2024-06-03 20:18:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:59,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:59,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:59,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154014219] [2024-06-03 20:18:59,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154014219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:59,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:59,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:59,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846839177] [2024-06-03 20:18:59,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:59,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:59,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:59,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:59,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:18:59,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 819 transitions, 14941 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:59,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:59,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:18:59,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:03,280 INFO L124 PetriNetUnfolderBase]: 6441/9614 cut-off events. [2024-06-03 20:19:03,280 INFO L125 PetriNetUnfolderBase]: For 2914250/2914250 co-relation queries the response was YES. [2024-06-03 20:19:03,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116540 conditions, 9614 events. 6441/9614 cut-off events. For 2914250/2914250 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 55221 event pairs, 1361 based on Foata normal form. 4/9616 useless extension candidates. Maximal degree in co-relation 116305. Up to 9372 conditions per place. [2024-06-03 20:19:03,471 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 775 selfloop transitions, 76 changer transitions 0/854 dead transitions. [2024-06-03 20:19:03,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 854 transitions, 17611 flow [2024-06-03 20:19:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-03 20:19:03,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-03 20:19:03,472 INFO L175 Difference]: Start difference. First operand has 521 places, 819 transitions, 14941 flow. Second operand 9 states and 142 transitions. [2024-06-03 20:19:03,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 854 transitions, 17611 flow [2024-06-03 20:19:16,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 854 transitions, 17475 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:16,261 INFO L231 Difference]: Finished difference. Result has 528 places, 831 transitions, 15305 flow [2024-06-03 20:19:16,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14805, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15305, PETRI_PLACES=528, PETRI_TRANSITIONS=831} [2024-06-03 20:19:16,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-03 20:19:16,262 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 831 transitions, 15305 flow [2024-06-03 20:19:16,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:16,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:16,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:16,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:19:16,262 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:16,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1193818980, now seen corresponding path program 2 times [2024-06-03 20:19:16,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:16,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206427494] [2024-06-03 20:19:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:16,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:17,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:17,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206427494] [2024-06-03 20:19:17,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206427494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:17,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:17,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:17,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441395934] [2024-06-03 20:19:17,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:17,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:17,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:17,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:17,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:17,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:19:17,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 831 transitions, 15305 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:17,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:17,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:19:17,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:20,737 INFO L124 PetriNetUnfolderBase]: 6434/9605 cut-off events. [2024-06-03 20:19:20,737 INFO L125 PetriNetUnfolderBase]: For 2921635/2921635 co-relation queries the response was YES. [2024-06-03 20:19:20,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116614 conditions, 9605 events. 6434/9605 cut-off events. For 2921635/2921635 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 55121 event pairs, 1384 based on Foata normal form. 1/9604 useless extension candidates. Maximal degree in co-relation 116377. Up to 9545 conditions per place. [2024-06-03 20:19:20,928 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 815 selfloop transitions, 29 changer transitions 0/847 dead transitions. [2024-06-03 20:19:20,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 847 transitions, 17045 flow [2024-06-03 20:19:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-03 20:19:20,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34959349593495936 [2024-06-03 20:19:20,929 INFO L175 Difference]: Start difference. First operand has 528 places, 831 transitions, 15305 flow. Second operand 9 states and 129 transitions. [2024-06-03 20:19:20,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 847 transitions, 17045 flow Killed by 15