./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.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/mix028_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.i ./goblint.2024-05-21_14-57-05.files/protection/mix028_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:08:17,509 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:08:17,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:08:17,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:08:17,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:08:17,595 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:08:17,597 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:08:17,597 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:08:17,598 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:08:17,598 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:08:17,598 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:08:17,599 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:08:17,599 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:08:17,599 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:08:17,600 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:08:17,600 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:08:17,600 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:08:17,601 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:08:17,601 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:08:17,601 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:08:17,601 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:08:17,602 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:08:17,602 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:08:17,602 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:08:17,602 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:08:17,603 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:08:17,603 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:08:17,603 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:08:17,603 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:08:17,604 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:08:17,604 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:08:17,604 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:08:17,604 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:08:17,604 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:08:17,605 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:08:17,605 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:08:17,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:08:17,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:08:17,605 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:08:17,605 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:08:17,606 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:08:17,606 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:08:17,606 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:08:17,606 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:08:17,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:08:17,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:08:17,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:08:17,869 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:08:17,870 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:08:17,871 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-20 16:08:18,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:08:19,097 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:08:19,098 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-20 16:08:19,110 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/534d30700/7a479f73dfa2430286cc92e902d17882/FLAG545b57a89 [2024-06-20 16:08:19,120 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/534d30700/7a479f73dfa2430286cc92e902d17882 [2024-06-20 16:08:19,122 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:08:19,123 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:08:19,123 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix028_tso.yml/witness.yml [2024-06-20 16:08:19,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:08:19,276 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:08:19,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:08:19,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:08:19,281 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:08:19,281 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:08:19" (1/2) ... [2024-06-20 16:08:19,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dbdb154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:08:19, skipping insertion in model container [2024-06-20 16:08:19,282 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:08:19" (1/2) ... [2024-06-20 16:08:19,283 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5fe99848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:08:19, skipping insertion in model container [2024-06-20 16:08:19,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:08:19" (2/2) ... [2024-06-20 16:08:19,283 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dbdb154 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19, skipping insertion in model container [2024-06-20 16:08:19,283 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:08:19" (2/2) ... [2024-06-20 16:08:19,284 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:08:19,353 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:08:19,354 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-20 16:08:19,354 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_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 || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-20 16:08:19,355 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) [2024-06-20 16:08:19,355 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:08:19,355 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-20 16:08:19,392 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:08:19,706 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:08:19,717 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:08:19,881 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:08:19,907 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:08:19,908 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19 WrapperNode [2024-06-20 16:08:19,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:08:19,911 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:08:19,911 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:08:19,912 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:08:19,917 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 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:19,932 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 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:19,969 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-20 16:08:19,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:08:19,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:08:19,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:08:19,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:08:19,978 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:19,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:19,982 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:20,021 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:08:20,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:20,022 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:20,029 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:20,032 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:20,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:20,041 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:20,044 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:08:20,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:08:20,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:08:20,045 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:08:20,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (1/1) ... [2024-06-20 16:08:20,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:08:20,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:08:20,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:08:20,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:08:20,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:08:20,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:08:20,179 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:08:20,179 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:08:20,179 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:08:20,179 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:08:20,180 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:08:20,180 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:08:20,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:08:20,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:08:20,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:08:20,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:08:20,181 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:08:20,294 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:08:20,295 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:08:20,603 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:08:20,603 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:08:20,719 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:08:20,719 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:08:20,720 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:08:20 BoogieIcfgContainer [2024-06-20 16:08:20,720 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:08:20,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:08:20,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:08:20,726 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:08:20,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:08:19" (1/4) ... [2024-06-20 16:08:20,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72cfd762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:08:20, skipping insertion in model container [2024-06-20 16:08:20,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:08:19" (2/4) ... [2024-06-20 16:08:20,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72cfd762 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:08:20, skipping insertion in model container [2024-06-20 16:08:20,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:08:19" (3/4) ... [2024-06-20 16:08:20,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72cfd762 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:08:20, skipping insertion in model container [2024-06-20 16:08:20,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:08:20" (4/4) ... [2024-06-20 16:08:20,730 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_tso.i [2024-06-20 16:08:20,744 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:08:20,744 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:08:20,744 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:08:20,789 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:08:20,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 16:08:20,848 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 16:08:20,849 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:08:20,850 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 62 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. [2024-06-20 16:08:20,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 16:08:20,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 16:08:20,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:08:20,871 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;@6d8d2df0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:08:20,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:08:20,877 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:08:20,877 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:08:20,879 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:08:20,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:20,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:08:20,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:20,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash 399969166, now seen corresponding path program 1 times [2024-06-20 16:08:20,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:20,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38202442] [2024-06-20 16:08:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:20,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:21,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:21,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38202442] [2024-06-20 16:08:21,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38202442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:21,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:21,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:08:21,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687014111] [2024-06-20 16:08:21,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:21,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:08:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:21,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:08:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:08:21,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:08:21,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:21,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:21,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:08:21,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:22,327 INFO L124 PetriNetUnfolderBase]: 1359/2109 cut-off events. [2024-06-20 16:08:22,327 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-20 16:08:22,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4223 conditions, 2109 events. 1359/2109 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10198 event pairs, 941 based on Foata normal form. 1/2045 useless extension candidates. Maximal degree in co-relation 4211. Up to 2029 conditions per place. [2024-06-20 16:08:22,342 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 16:08:22,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-20 16:08:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:08:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:08:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-20 16:08:22,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 16:08:22,352 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-20 16:08:22,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-20 16:08:22,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:22,358 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 16:08:22,359 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} [2024-06-20 16:08:22,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 16:08:22,362 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 16:08:22,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:22,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:22,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:22,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:08:22,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:22,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:22,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2118308141, now seen corresponding path program 1 times [2024-06-20 16:08:22,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:22,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457068700] [2024-06-20 16:08:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:22,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457068700] [2024-06-20 16:08:23,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457068700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:23,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:23,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:08:23,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026957108] [2024-06-20 16:08:23,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:23,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:08:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:08:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:08:23,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:23,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:23,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:23,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:23,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:23,385 INFO L124 PetriNetUnfolderBase]: 1560/2337 cut-off events. [2024-06-20 16:08:23,385 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-06-20 16:08:23,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5353 conditions, 2337 events. 1560/2337 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10932 event pairs, 930 based on Foata normal form. 3/2339 useless extension candidates. Maximal degree in co-relation 5341. Up to 2302 conditions per place. [2024-06-20 16:08:23,396 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-20 16:08:23,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2024-06-20 16:08:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:08:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:08:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-20 16:08:23,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-20 16:08:23,400 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 90 transitions. [2024-06-20 16:08:23,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2024-06-20 16:08:23,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:08:23,402 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-20 16:08:23,403 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-20 16:08:23,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-20 16:08:23,403 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-20 16:08:23,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:23,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:23,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:23,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:08:23,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:23,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1243043897, now seen corresponding path program 1 times [2024-06-20 16:08:23,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:23,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748939749] [2024-06-20 16:08:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:23,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:24,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:24,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748939749] [2024-06-20 16:08:24,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748939749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:24,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:24,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:08:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023807999] [2024-06-20 16:08:24,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:24,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:08:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:08:24,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:08:24,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:24,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:24,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:24,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:24,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:24,465 INFO L124 PetriNetUnfolderBase]: 1568/2357 cut-off events. [2024-06-20 16:08:24,466 INFO L125 PetriNetUnfolderBase]: For 1342/1342 co-relation queries the response was YES. [2024-06-20 16:08:24,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 2357 events. 1568/2357 cut-off events. For 1342/1342 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11219 event pairs, 669 based on Foata normal form. 5/2361 useless extension candidates. Maximal degree in co-relation 5976. Up to 2248 conditions per place. [2024-06-20 16:08:24,477 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-20 16:08:24,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 394 flow [2024-06-20 16:08:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:08:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:08:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-20 16:08:24,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-20 16:08:24,479 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 118 transitions. [2024-06-20 16:08:24,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 394 flow [2024-06-20 16:08:24,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 380 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 16:08:24,482 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-20 16:08:24,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-20 16:08:24,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-20 16:08:24,483 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-20 16:08:24,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:24,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:24,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:24,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:08:24,484 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:24,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:24,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1154035042, now seen corresponding path program 1 times [2024-06-20 16:08:24,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:24,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987814875] [2024-06-20 16:08:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:24,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:25,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987814875] [2024-06-20 16:08:25,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987814875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:25,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:25,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:08:25,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554123118] [2024-06-20 16:08:25,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:25,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:08:25,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:25,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:08:25,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:08:25,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:25,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:25,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:25,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:25,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:25,573 INFO L124 PetriNetUnfolderBase]: 1580/2377 cut-off events. [2024-06-20 16:08:25,573 INFO L125 PetriNetUnfolderBase]: For 3185/3187 co-relation queries the response was YES. [2024-06-20 16:08:25,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7134 conditions, 2377 events. 1580/2377 cut-off events. For 3185/3187 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11367 event pairs, 481 based on Foata normal form. 12/2388 useless extension candidates. Maximal degree in co-relation 7117. Up to 2216 conditions per place. [2024-06-20 16:08:25,584 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-20 16:08:25,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 497 flow [2024-06-20 16:08:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:25,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-20 16:08:25,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-20 16:08:25,586 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 135 transitions. [2024-06-20 16:08:25,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 497 flow [2024-06-20 16:08:25,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 489 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-20 16:08:25,590 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 291 flow [2024-06-20 16:08:25,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-20 16:08:25,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-20 16:08:25,591 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 291 flow [2024-06-20 16:08:25,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:25,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:25,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:25,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:08:25,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:25,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash 123911033, now seen corresponding path program 1 times [2024-06-20 16:08:25,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:25,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911988022] [2024-06-20 16:08:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:26,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:26,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911988022] [2024-06-20 16:08:26,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911988022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:26,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:26,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:08:26,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928411103] [2024-06-20 16:08:26,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:26,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:08:26,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:26,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:08:26,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:08:26,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:26,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:26,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:26,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:26,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:26,608 INFO L124 PetriNetUnfolderBase]: 1368/2118 cut-off events. [2024-06-20 16:08:26,608 INFO L125 PetriNetUnfolderBase]: For 4021/4021 co-relation queries the response was YES. [2024-06-20 16:08:26,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 2118 events. 1368/2118 cut-off events. For 4021/4021 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10397 event pairs, 562 based on Foata normal form. 2/2099 useless extension candidates. Maximal degree in co-relation 6868. Up to 2036 conditions per place. [2024-06-20 16:08:26,619 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-20 16:08:26,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 433 flow [2024-06-20 16:08:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:08:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:08:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 16:08:26,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:08:26,621 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 291 flow. Second operand 5 states and 90 transitions. [2024-06-20 16:08:26,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 433 flow [2024-06-20 16:08:26,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 383 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:26,625 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 265 flow [2024-06-20 16:08:26,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-20 16:08:26,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-20 16:08:26,625 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 265 flow [2024-06-20 16:08:26,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:26,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:26,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:26,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:08:26,626 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:26,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:26,627 INFO L85 PathProgramCache]: Analyzing trace with hash -454848311, now seen corresponding path program 1 times [2024-06-20 16:08:26,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:26,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293783140] [2024-06-20 16:08:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:26,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:27,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293783140] [2024-06-20 16:08:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293783140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:27,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:27,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:27,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948458445] [2024-06-20 16:08:27,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:27,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:27,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:27,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:27,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:27,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:27,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:27,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:27,685 INFO L124 PetriNetUnfolderBase]: 1358/2140 cut-off events. [2024-06-20 16:08:27,685 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2024-06-20 16:08:27,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6907 conditions, 2140 events. 1358/2140 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10571 event pairs, 526 based on Foata normal form. 4/2135 useless extension candidates. Maximal degree in co-relation 6884. Up to 2004 conditions per place. [2024-06-20 16:08:27,697 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-06-20 16:08:27,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 453 flow [2024-06-20 16:08:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:08:27,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-20 16:08:27,698 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 265 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:08:27,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 453 flow [2024-06-20 16:08:27,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 431 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:27,702 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-20 16:08:27,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-20 16:08:27,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-20 16:08:27,703 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-20 16:08:27,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:27,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:27,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:27,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:08:27,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:27,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:27,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1649140628, now seen corresponding path program 1 times [2024-06-20 16:08:27,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:27,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242347140] [2024-06-20 16:08:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:27,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:28,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:28,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242347140] [2024-06-20 16:08:28,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242347140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:28,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:28,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:28,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102004026] [2024-06-20 16:08:28,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:28,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:28,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:28,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:28,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:28,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:28,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:28,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:28,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:28,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:28,874 INFO L124 PetriNetUnfolderBase]: 1571/2365 cut-off events. [2024-06-20 16:08:28,874 INFO L125 PetriNetUnfolderBase]: For 7224/7228 co-relation queries the response was YES. [2024-06-20 16:08:28,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8339 conditions, 2365 events. 1571/2365 cut-off events. For 7224/7228 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11152 event pairs, 635 based on Foata normal form. 8/2372 useless extension candidates. Maximal degree in co-relation 8316. Up to 2253 conditions per place. [2024-06-20 16:08:28,887 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-06-20 16:08:28,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 539 flow [2024-06-20 16:08:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 16:08:28,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 16:08:28,888 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 6 states and 110 transitions. [2024-06-20 16:08:28,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 539 flow [2024-06-20 16:08:28,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 509 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:28,893 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 339 flow [2024-06-20 16:08:28,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-20 16:08:28,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-20 16:08:28,894 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 339 flow [2024-06-20 16:08:28,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:28,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:28,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:28,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:08:28,895 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:28,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1180546856, now seen corresponding path program 2 times [2024-06-20 16:08:28,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:28,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795651226] [2024-06-20 16:08:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:28,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:29,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:29,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795651226] [2024-06-20 16:08:29,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795651226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:29,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:29,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:29,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507204246] [2024-06-20 16:08:29,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:29,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:29,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:29,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:29,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:29,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:29,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:29,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:29,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:29,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:30,023 INFO L124 PetriNetUnfolderBase]: 1559/2338 cut-off events. [2024-06-20 16:08:30,024 INFO L125 PetriNetUnfolderBase]: For 8650/8654 co-relation queries the response was YES. [2024-06-20 16:08:30,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8508 conditions, 2338 events. 1559/2338 cut-off events. For 8650/8654 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10921 event pairs, 649 based on Foata normal form. 3/2338 useless extension candidates. Maximal degree in co-relation 8484. Up to 2237 conditions per place. [2024-06-20 16:08:30,041 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 48 selfloop transitions, 20 changer transitions 0/72 dead transitions. [2024-06-20 16:08:30,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 513 flow [2024-06-20 16:08:30,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 16:08:30,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:08:30,043 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 339 flow. Second operand 6 states and 106 transitions. [2024-06-20 16:08:30,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 513 flow [2024-06-20 16:08:30,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 484 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:30,053 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 358 flow [2024-06-20 16:08:30,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=358, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-20 16:08:30,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-20 16:08:30,056 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 358 flow [2024-06-20 16:08:30,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:30,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:30,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:30,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:08:30,056 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:30,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:30,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1732407818, now seen corresponding path program 1 times [2024-06-20 16:08:30,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:30,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053284466] [2024-06-20 16:08:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:30,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:30,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:30,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053284466] [2024-06-20 16:08:30,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053284466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:30,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:30,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:30,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586185629] [2024-06-20 16:08:30,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:30,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:30,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:30,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:30,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:30,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 358 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:30,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:30,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:30,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:31,331 INFO L124 PetriNetUnfolderBase]: 1733/2611 cut-off events. [2024-06-20 16:08:31,332 INFO L125 PetriNetUnfolderBase]: For 11528/11528 co-relation queries the response was YES. [2024-06-20 16:08:31,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9886 conditions, 2611 events. 1733/2611 cut-off events. For 11528/11528 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12489 event pairs, 546 based on Foata normal form. 8/2617 useless extension candidates. Maximal degree in co-relation 9861. Up to 2237 conditions per place. [2024-06-20 16:08:31,345 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 79 selfloop transitions, 39 changer transitions 0/122 dead transitions. [2024-06-20 16:08:31,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 122 transitions, 995 flow [2024-06-20 16:08:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:08:31,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 16:08:31,347 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 358 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:08:31,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 122 transitions, 995 flow [2024-06-20 16:08:31,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 122 transitions, 869 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:31,357 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 579 flow [2024-06-20 16:08:31,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2024-06-20 16:08:31,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-20 16:08:31,358 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 579 flow [2024-06-20 16:08:31,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:31,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:31,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:31,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:08:31,359 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:31,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash -416246752, now seen corresponding path program 2 times [2024-06-20 16:08:31,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:31,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284944746] [2024-06-20 16:08:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:31,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:32,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:32,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284944746] [2024-06-20 16:08:32,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284944746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:32,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:32,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:32,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80008435] [2024-06-20 16:08:32,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:32,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:32,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:32,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:32,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:32,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:32,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:32,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:32,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:32,745 INFO L124 PetriNetUnfolderBase]: 1805/2725 cut-off events. [2024-06-20 16:08:32,746 INFO L125 PetriNetUnfolderBase]: For 14982/14984 co-relation queries the response was YES. [2024-06-20 16:08:32,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11341 conditions, 2725 events. 1805/2725 cut-off events. For 14982/14984 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13155 event pairs, 550 based on Foata normal form. 12/2735 useless extension candidates. Maximal degree in co-relation 11312. Up to 2285 conditions per place. [2024-06-20 16:08:32,761 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 65 selfloop transitions, 48 changer transitions 0/117 dead transitions. [2024-06-20 16:08:32,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 1001 flow [2024-06-20 16:08:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 16:08:32,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-20 16:08:32,763 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 579 flow. Second operand 7 states and 131 transitions. [2024-06-20 16:08:32,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 1001 flow [2024-06-20 16:08:32,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 973 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 16:08:32,774 INFO L231 Difference]: Finished difference. Result has 73 places, 88 transitions, 732 flow [2024-06-20 16:08:32,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=732, PETRI_PLACES=73, PETRI_TRANSITIONS=88} [2024-06-20 16:08:32,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-20 16:08:32,774 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 88 transitions, 732 flow [2024-06-20 16:08:32,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:32,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:32,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:32,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:08:32,775 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:32,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:32,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2057991610, now seen corresponding path program 3 times [2024-06-20 16:08:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:32,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938118463] [2024-06-20 16:08:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:32,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:33,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938118463] [2024-06-20 16:08:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938118463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:33,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661637012] [2024-06-20 16:08:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:33,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:33,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:33,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:33,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 88 transitions, 732 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:33,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:33,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:33,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:34,293 INFO L124 PetriNetUnfolderBase]: 1841/2768 cut-off events. [2024-06-20 16:08:34,294 INFO L125 PetriNetUnfolderBase]: For 18284/18290 co-relation queries the response was YES. [2024-06-20 16:08:34,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12341 conditions, 2768 events. 1841/2768 cut-off events. For 18284/18290 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13309 event pairs, 560 based on Foata normal form. 7/2768 useless extension candidates. Maximal degree in co-relation 12310. Up to 2301 conditions per place. [2024-06-20 16:08:34,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 60 changer transitions 0/126 dead transitions. [2024-06-20 16:08:34,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 126 transitions, 1266 flow [2024-06-20 16:08:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 16:08:34,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-20 16:08:34,311 INFO L175 Difference]: Start difference. First operand has 73 places, 88 transitions, 732 flow. Second operand 7 states and 131 transitions. [2024-06-20 16:08:34,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 126 transitions, 1266 flow [2024-06-20 16:08:34,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 126 transitions, 1150 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:34,329 INFO L231 Difference]: Finished difference. Result has 76 places, 98 transitions, 880 flow [2024-06-20 16:08:34,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=880, PETRI_PLACES=76, PETRI_TRANSITIONS=98} [2024-06-20 16:08:34,329 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-20 16:08:34,330 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 98 transitions, 880 flow [2024-06-20 16:08:34,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:34,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:34,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:34,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:08:34,330 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:34,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash -411605122, now seen corresponding path program 4 times [2024-06-20 16:08:34,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:34,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205606680] [2024-06-20 16:08:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:34,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:35,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:35,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205606680] [2024-06-20 16:08:35,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205606680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:35,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:35,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:35,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853958831] [2024-06-20 16:08:35,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:35,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:35,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:35,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:35,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:35,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 98 transitions, 880 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:35,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:35,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:35,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:35,716 INFO L124 PetriNetUnfolderBase]: 1825/2751 cut-off events. [2024-06-20 16:08:35,716 INFO L125 PetriNetUnfolderBase]: For 18506/18512 co-relation queries the response was YES. [2024-06-20 16:08:35,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12164 conditions, 2751 events. 1825/2751 cut-off events. For 18506/18512 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13207 event pairs, 569 based on Foata normal form. 7/2750 useless extension candidates. Maximal degree in co-relation 12132. Up to 2294 conditions per place. [2024-06-20 16:08:35,729 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 58 changer transitions 0/124 dead transitions. [2024-06-20 16:08:35,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 1240 flow [2024-06-20 16:08:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:08:35,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 16:08:35,731 INFO L175 Difference]: Start difference. First operand has 76 places, 98 transitions, 880 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:08:35,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 1240 flow [2024-06-20 16:08:35,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1144 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:35,753 INFO L231 Difference]: Finished difference. Result has 80 places, 98 transitions, 910 flow [2024-06-20 16:08:35,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=910, PETRI_PLACES=80, PETRI_TRANSITIONS=98} [2024-06-20 16:08:35,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-20 16:08:35,754 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 98 transitions, 910 flow [2024-06-20 16:08:35,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:35,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:35,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:35,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:08:35,754 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:35,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:35,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1594980100, now seen corresponding path program 1 times [2024-06-20 16:08:35,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:35,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169724208] [2024-06-20 16:08:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:35,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:36,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:36,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169724208] [2024-06-20 16:08:36,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169724208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:36,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:36,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:36,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605500294] [2024-06-20 16:08:36,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:36,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:36,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:36,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:36,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:36,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:36,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 98 transitions, 910 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:36,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:36,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:36,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:37,351 INFO L124 PetriNetUnfolderBase]: 1610/2509 cut-off events. [2024-06-20 16:08:37,352 INFO L125 PetriNetUnfolderBase]: For 18046/18048 co-relation queries the response was YES. [2024-06-20 16:08:37,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11163 conditions, 2509 events. 1610/2509 cut-off events. For 18046/18048 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12329 event pairs, 517 based on Foata normal form. 4/2496 useless extension candidates. Maximal degree in co-relation 11129. Up to 2349 conditions per place. [2024-06-20 16:08:37,365 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2024-06-20 16:08:37,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1226 flow [2024-06-20 16:08:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:08:37,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:08:37,366 INFO L175 Difference]: Start difference. First operand has 80 places, 98 transitions, 910 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:08:37,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1226 flow [2024-06-20 16:08:37,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 1083 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:37,387 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 826 flow [2024-06-20 16:08:37,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=826, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-20 16:08:37,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-20 16:08:37,389 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 826 flow [2024-06-20 16:08:37,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:37,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:37,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:37,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:08:37,389 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:37,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1914180474, now seen corresponding path program 1 times [2024-06-20 16:08:37,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:37,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807578287] [2024-06-20 16:08:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:37,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:38,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:38,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807578287] [2024-06-20 16:08:38,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807578287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:38,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:38,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:08:38,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055785021] [2024-06-20 16:08:38,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:38,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:08:38,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:08:38,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:08:38,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:38,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 826 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:38,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:38,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:38,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:38,497 INFO L124 PetriNetUnfolderBase]: 1607/2525 cut-off events. [2024-06-20 16:08:38,498 INFO L125 PetriNetUnfolderBase]: For 18710/18712 co-relation queries the response was YES. [2024-06-20 16:08:38,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11118 conditions, 2525 events. 1607/2525 cut-off events. For 18710/18712 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12538 event pairs, 564 based on Foata normal form. 1/2525 useless extension candidates. Maximal degree in co-relation 11083. Up to 2387 conditions per place. [2024-06-20 16:08:38,512 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 98 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-06-20 16:08:38,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 1084 flow [2024-06-20 16:08:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:08:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:08:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-20 16:08:38,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-20 16:08:38,514 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 826 flow. Second operand 5 states and 86 transitions. [2024-06-20 16:08:38,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 1084 flow [2024-06-20 16:08:38,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 1043 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:38,530 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 835 flow [2024-06-20 16:08:38,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=835, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2024-06-20 16:08:38,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-20 16:08:38,531 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 835 flow [2024-06-20 16:08:38,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:38,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:38,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:38,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:08:38,532 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:38,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:38,532 INFO L85 PathProgramCache]: Analyzing trace with hash -18746278, now seen corresponding path program 1 times [2024-06-20 16:08:38,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:38,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891145888] [2024-06-20 16:08:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:38,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:39,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:39,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891145888] [2024-06-20 16:08:39,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891145888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:39,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:39,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:39,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430754230] [2024-06-20 16:08:39,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:39,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:39,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:39,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:39,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:39,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:39,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 835 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 16:08:39,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:39,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:39,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:39,915 INFO L124 PetriNetUnfolderBase]: 1910/2902 cut-off events. [2024-06-20 16:08:39,915 INFO L125 PetriNetUnfolderBase]: For 26325/26327 co-relation queries the response was YES. [2024-06-20 16:08:39,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13481 conditions, 2902 events. 1910/2902 cut-off events. For 26325/26327 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14248 event pairs, 562 based on Foata normal form. 8/2908 useless extension candidates. Maximal degree in co-relation 13445. Up to 2361 conditions per place. [2024-06-20 16:08:39,930 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 77 selfloop transitions, 65 changer transitions 0/146 dead transitions. [2024-06-20 16:08:39,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 146 transitions, 1463 flow [2024-06-20 16:08:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:08:39,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:08:39,932 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 835 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:08:39,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 146 transitions, 1463 flow [2024-06-20 16:08:39,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 146 transitions, 1435 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:39,950 INFO L231 Difference]: Finished difference. Result has 85 places, 115 transitions, 1102 flow [2024-06-20 16:08:39,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1102, PETRI_PLACES=85, PETRI_TRANSITIONS=115} [2024-06-20 16:08:39,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-20 16:08:39,951 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 115 transitions, 1102 flow [2024-06-20 16:08:39,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 16:08:39,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:39,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:39,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:08:39,952 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:39,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash -18751858, now seen corresponding path program 2 times [2024-06-20 16:08:39,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:39,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882909841] [2024-06-20 16:08:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:39,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:40,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:40,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882909841] [2024-06-20 16:08:40,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882909841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:40,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:40,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:40,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415874830] [2024-06-20 16:08:40,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:40,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:40,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:40,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:40,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 115 transitions, 1102 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 16:08:40,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:40,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:40,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:41,302 INFO L124 PetriNetUnfolderBase]: 1890/2882 cut-off events. [2024-06-20 16:08:41,303 INFO L125 PetriNetUnfolderBase]: For 29849/29855 co-relation queries the response was YES. [2024-06-20 16:08:41,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13886 conditions, 2882 events. 1890/2882 cut-off events. For 29849/29855 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14136 event pairs, 572 based on Foata normal form. 14/2894 useless extension candidates. Maximal degree in co-relation 13849. Up to 2345 conditions per place. [2024-06-20 16:08:41,319 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 74 selfloop transitions, 69 changer transitions 0/147 dead transitions. [2024-06-20 16:08:41,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 147 transitions, 1542 flow [2024-06-20 16:08:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 16:08:41,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-20 16:08:41,321 INFO L175 Difference]: Start difference. First operand has 85 places, 115 transitions, 1102 flow. Second operand 7 states and 135 transitions. [2024-06-20 16:08:41,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 147 transitions, 1542 flow [2024-06-20 16:08:41,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 147 transitions, 1422 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:41,353 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 1131 flow [2024-06-20 16:08:41,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2024-06-20 16:08:41,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-20 16:08:41,354 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 1131 flow [2024-06-20 16:08:41,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 16:08:41,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:41,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:41,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:08:41,355 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:41,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:41,355 INFO L85 PathProgramCache]: Analyzing trace with hash -516640596, now seen corresponding path program 3 times [2024-06-20 16:08:41,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:41,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814543101] [2024-06-20 16:08:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:41,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:41,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:41,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814543101] [2024-06-20 16:08:41,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814543101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:41,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:41,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:41,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365263010] [2024-06-20 16:08:41,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:41,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:41,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:41,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:42,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:42,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 1131 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 16:08:42,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:42,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:42,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:42,606 INFO L124 PetriNetUnfolderBase]: 1874/2852 cut-off events. [2024-06-20 16:08:42,606 INFO L125 PetriNetUnfolderBase]: For 32658/32666 co-relation queries the response was YES. [2024-06-20 16:08:42,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13913 conditions, 2852 events. 1874/2852 cut-off events. For 32658/32666 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13931 event pairs, 576 based on Foata normal form. 9/2859 useless extension candidates. Maximal degree in co-relation 13875. Up to 2332 conditions per place. [2024-06-20 16:08:42,621 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 72 selfloop transitions, 62 changer transitions 0/138 dead transitions. [2024-06-20 16:08:42,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 1473 flow [2024-06-20 16:08:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:42,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:08:42,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-20 16:08:42,622 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 1131 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:08:42,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 1473 flow [2024-06-20 16:08:42,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1240 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:42,651 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 1033 flow [2024-06-20 16:08:42,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1033, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2024-06-20 16:08:42,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-20 16:08:42,652 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 1033 flow [2024-06-20 16:08:42,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 16:08:42,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:42,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:42,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:08:42,652 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:42,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:42,653 INFO L85 PathProgramCache]: Analyzing trace with hash -789945992, now seen corresponding path program 1 times [2024-06-20 16:08:42,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:42,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492823060] [2024-06-20 16:08:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:42,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:43,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492823060] [2024-06-20 16:08:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492823060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:43,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:43,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:43,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105274543] [2024-06-20 16:08:43,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:43,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:43,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:43,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:43,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 1033 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:08:43,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:43,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:43,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:44,036 INFO L124 PetriNetUnfolderBase]: 1664/2625 cut-off events. [2024-06-20 16:08:44,036 INFO L125 PetriNetUnfolderBase]: For 28604/28606 co-relation queries the response was YES. [2024-06-20 16:08:44,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12620 conditions, 2625 events. 1664/2625 cut-off events. For 28604/28606 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13172 event pairs, 581 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 12582. Up to 2468 conditions per place. [2024-06-20 16:08:44,053 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 11 changer transitions 0/127 dead transitions. [2024-06-20 16:08:44,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 127 transitions, 1329 flow [2024-06-20 16:08:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 16:08:44,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:08:44,055 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 1033 flow. Second operand 6 states and 99 transitions. [2024-06-20 16:08:44,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 127 transitions, 1329 flow [2024-06-20 16:08:44,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1146 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:44,094 INFO L231 Difference]: Finished difference. Result has 88 places, 118 transitions, 910 flow [2024-06-20 16:08:44,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=910, PETRI_PLACES=88, PETRI_TRANSITIONS=118} [2024-06-20 16:08:44,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-20 16:08:44,094 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 118 transitions, 910 flow [2024-06-20 16:08:44,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:08:44,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:44,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:44,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:08:44,095 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:44,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:44,095 INFO L85 PathProgramCache]: Analyzing trace with hash -699459325, now seen corresponding path program 1 times [2024-06-20 16:08:44,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:44,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707573082] [2024-06-20 16:08:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:44,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:44,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:44,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707573082] [2024-06-20 16:08:44,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707573082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:44,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:44,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:44,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075712595] [2024-06-20 16:08:44,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:44,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:44,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:44,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:44,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:44,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:44,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 118 transitions, 910 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 16:08:44,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:44,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:44,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:45,434 INFO L124 PetriNetUnfolderBase]: 1885/2866 cut-off events. [2024-06-20 16:08:45,435 INFO L125 PetriNetUnfolderBase]: For 35380/35384 co-relation queries the response was YES. [2024-06-20 16:08:45,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14011 conditions, 2866 events. 1885/2866 cut-off events. For 35380/35384 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13930 event pairs, 445 based on Foata normal form. 6/2871 useless extension candidates. Maximal degree in co-relation 13972. Up to 2545 conditions per place. [2024-06-20 16:08:45,447 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 32 changer transitions 0/148 dead transitions. [2024-06-20 16:08:45,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 148 transitions, 1384 flow [2024-06-20 16:08:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:08:45,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-20 16:08:45,449 INFO L175 Difference]: Start difference. First operand has 88 places, 118 transitions, 910 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:08:45,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 148 transitions, 1384 flow [2024-06-20 16:08:45,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 148 transitions, 1346 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:45,478 INFO L231 Difference]: Finished difference. Result has 91 places, 122 transitions, 991 flow [2024-06-20 16:08:45,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=991, PETRI_PLACES=91, PETRI_TRANSITIONS=122} [2024-06-20 16:08:45,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 16:08:45,479 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 122 transitions, 991 flow [2024-06-20 16:08:45,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 16:08:45,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:45,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:45,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:08:45,481 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:45,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash -585779845, now seen corresponding path program 2 times [2024-06-20 16:08:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:45,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232896350] [2024-06-20 16:08:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:45,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:46,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:46,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232896350] [2024-06-20 16:08:46,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232896350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:46,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:46,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:46,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224728284] [2024-06-20 16:08:46,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:46,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:46,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:46,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:46,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:46,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 122 transitions, 991 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 16:08:46,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:46,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:46,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:47,007 INFO L124 PetriNetUnfolderBase]: 1877/2853 cut-off events. [2024-06-20 16:08:47,007 INFO L125 PetriNetUnfolderBase]: For 38934/38938 co-relation queries the response was YES. [2024-06-20 16:08:47,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14360 conditions, 2853 events. 1877/2853 cut-off events. For 38934/38938 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13853 event pairs, 583 based on Foata normal form. 6/2858 useless extension candidates. Maximal degree in co-relation 14320. Up to 2621 conditions per place. [2024-06-20 16:08:47,023 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 33 changer transitions 0/146 dead transitions. [2024-06-20 16:08:47,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 146 transitions, 1353 flow [2024-06-20 16:08:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:08:47,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:08:47,026 INFO L175 Difference]: Start difference. First operand has 91 places, 122 transitions, 991 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:08:47,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 146 transitions, 1353 flow [2024-06-20 16:08:47,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 146 transitions, 1293 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:47,073 INFO L231 Difference]: Finished difference. Result has 95 places, 122 transitions, 1006 flow [2024-06-20 16:08:47,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1006, PETRI_PLACES=95, PETRI_TRANSITIONS=122} [2024-06-20 16:08:47,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-20 16:08:47,074 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 122 transitions, 1006 flow [2024-06-20 16:08:47,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-20 16:08:47,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:47,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:47,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:08:47,074 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:47,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:47,075 INFO L85 PathProgramCache]: Analyzing trace with hash -581126497, now seen corresponding path program 1 times [2024-06-20 16:08:47,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:47,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689813231] [2024-06-20 16:08:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:47,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:48,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:48,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689813231] [2024-06-20 16:08:48,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689813231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:48,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:48,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:48,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455100824] [2024-06-20 16:08:48,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:48,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:48,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:48,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:48,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:48,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 122 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:48,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:48,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:48,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:48,699 INFO L124 PetriNetUnfolderBase]: 1969/3002 cut-off events. [2024-06-20 16:08:48,700 INFO L125 PetriNetUnfolderBase]: For 47004/47006 co-relation queries the response was YES. [2024-06-20 16:08:48,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15259 conditions, 3002 events. 1969/3002 cut-off events. For 47004/47006 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14857 event pairs, 521 based on Foata normal form. 24/3024 useless extension candidates. Maximal degree in co-relation 15217. Up to 2321 conditions per place. [2024-06-20 16:08:48,719 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 85 selfloop transitions, 70 changer transitions 0/159 dead transitions. [2024-06-20 16:08:48,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 159 transitions, 1454 flow [2024-06-20 16:08:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:08:48,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:08:48,721 INFO L175 Difference]: Start difference. First operand has 95 places, 122 transitions, 1006 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:08:48,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 159 transitions, 1454 flow [2024-06-20 16:08:48,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 159 transitions, 1379 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:48,760 INFO L231 Difference]: Finished difference. Result has 97 places, 124 transitions, 1113 flow [2024-06-20 16:08:48,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1113, PETRI_PLACES=97, PETRI_TRANSITIONS=124} [2024-06-20 16:08:48,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-20 16:08:48,760 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 124 transitions, 1113 flow [2024-06-20 16:08:48,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:48,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:48,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:48,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:08:48,761 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:48,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash 920906485, now seen corresponding path program 1 times [2024-06-20 16:08:48,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:48,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860637064] [2024-06-20 16:08:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:48,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:49,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:49,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860637064] [2024-06-20 16:08:49,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860637064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:49,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:49,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:49,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784674101] [2024-06-20 16:08:49,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:49,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:49,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:49,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:49,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:49,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:49,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 124 transitions, 1113 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-20 16:08:49,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:49,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:49,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:49,984 INFO L124 PetriNetUnfolderBase]: 1974/3021 cut-off events. [2024-06-20 16:08:49,985 INFO L125 PetriNetUnfolderBase]: For 48238/48244 co-relation queries the response was YES. [2024-06-20 16:08:49,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15921 conditions, 3021 events. 1974/3021 cut-off events. For 48238/48244 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14988 event pairs, 612 based on Foata normal form. 7/3027 useless extension candidates. Maximal degree in co-relation 15878. Up to 2916 conditions per place. [2024-06-20 16:08:50,003 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 126 selfloop transitions, 13 changer transitions 0/143 dead transitions. [2024-06-20 16:08:50,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 143 transitions, 1473 flow [2024-06-20 16:08:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-20 16:08:50,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-20 16:08:50,004 INFO L175 Difference]: Start difference. First operand has 97 places, 124 transitions, 1113 flow. Second operand 6 states and 100 transitions. [2024-06-20 16:08:50,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 143 transitions, 1473 flow [2024-06-20 16:08:50,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 143 transitions, 1325 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:50,047 INFO L231 Difference]: Finished difference. Result has 97 places, 127 transitions, 1032 flow [2024-06-20 16:08:50,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1032, PETRI_PLACES=97, PETRI_TRANSITIONS=127} [2024-06-20 16:08:50,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-20 16:08:50,047 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 127 transitions, 1032 flow [2024-06-20 16:08:50,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-20 16:08:50,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:50,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:50,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:08:50,048 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:50,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash 518912411, now seen corresponding path program 2 times [2024-06-20 16:08:50,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:50,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77600968] [2024-06-20 16:08:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:50,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:50,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:50,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77600968] [2024-06-20 16:08:50,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77600968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:50,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:50,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:50,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645418767] [2024-06-20 16:08:50,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:50,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:50,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:50,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:50,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 127 transitions, 1032 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:50,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:50,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:50,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:51,577 INFO L124 PetriNetUnfolderBase]: 1991/3020 cut-off events. [2024-06-20 16:08:51,577 INFO L125 PetriNetUnfolderBase]: For 51984/51990 co-relation queries the response was YES. [2024-06-20 16:08:51,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16040 conditions, 3020 events. 1991/3020 cut-off events. For 51984/51990 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14851 event pairs, 536 based on Foata normal form. 5/3015 useless extension candidates. Maximal degree in co-relation 15996. Up to 2504 conditions per place. [2024-06-20 16:08:51,593 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 80 selfloop transitions, 74 changer transitions 0/158 dead transitions. [2024-06-20 16:08:51,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 158 transitions, 1464 flow [2024-06-20 16:08:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:08:51,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:08:51,595 INFO L175 Difference]: Start difference. First operand has 97 places, 127 transitions, 1032 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:08:51,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 158 transitions, 1464 flow [2024-06-20 16:08:51,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 158 transitions, 1421 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:51,633 INFO L231 Difference]: Finished difference. Result has 101 places, 129 transitions, 1181 flow [2024-06-20 16:08:51,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1181, PETRI_PLACES=101, PETRI_TRANSITIONS=129} [2024-06-20 16:08:51,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-20 16:08:51,633 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 129 transitions, 1181 flow [2024-06-20 16:08:51,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:51,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:51,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:51,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:08:51,634 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:51,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:51,634 INFO L85 PathProgramCache]: Analyzing trace with hash 527483291, now seen corresponding path program 3 times [2024-06-20 16:08:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:51,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351118513] [2024-06-20 16:08:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:51,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:52,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351118513] [2024-06-20 16:08:52,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351118513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:52,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:52,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38113246] [2024-06-20 16:08:52,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:52,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:52,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:52,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 129 transitions, 1181 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:52,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:52,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:52,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:53,319 INFO L124 PetriNetUnfolderBase]: 2008/3047 cut-off events. [2024-06-20 16:08:53,319 INFO L125 PetriNetUnfolderBase]: For 58144/58150 co-relation queries the response was YES. [2024-06-20 16:08:53,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16968 conditions, 3047 events. 2008/3047 cut-off events. For 58144/58150 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14987 event pairs, 485 based on Foata normal form. 5/3042 useless extension candidates. Maximal degree in co-relation 16923. Up to 2293 conditions per place. [2024-06-20 16:08:53,338 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 83 selfloop transitions, 81 changer transitions 0/168 dead transitions. [2024-06-20 16:08:53,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 168 transitions, 1773 flow [2024-06-20 16:08:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:08:53,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:08:53,340 INFO L175 Difference]: Start difference. First operand has 101 places, 129 transitions, 1181 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:08:53,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 168 transitions, 1773 flow [2024-06-20 16:08:53,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 168 transitions, 1601 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:53,403 INFO L231 Difference]: Finished difference. Result has 103 places, 133 transitions, 1254 flow [2024-06-20 16:08:53,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1254, PETRI_PLACES=103, PETRI_TRANSITIONS=133} [2024-06-20 16:08:53,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-20 16:08:53,404 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 133 transitions, 1254 flow [2024-06-20 16:08:53,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:53,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:53,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:53,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:08:53,405 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:53,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1475064887, now seen corresponding path program 4 times [2024-06-20 16:08:53,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:53,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100420146] [2024-06-20 16:08:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:54,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:54,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100420146] [2024-06-20 16:08:54,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100420146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:54,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:54,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:54,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829458020] [2024-06-20 16:08:54,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:54,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:54,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:54,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:54,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:54,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:54,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 133 transitions, 1254 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:54,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:54,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:54,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:55,056 INFO L124 PetriNetUnfolderBase]: 2000/3039 cut-off events. [2024-06-20 16:08:55,056 INFO L125 PetriNetUnfolderBase]: For 62496/62502 co-relation queries the response was YES. [2024-06-20 16:08:55,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17160 conditions, 3039 events. 2000/3039 cut-off events. For 62496/62502 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14903 event pairs, 546 based on Foata normal form. 5/3034 useless extension candidates. Maximal degree in co-relation 17114. Up to 2519 conditions per place. [2024-06-20 16:08:55,077 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 72 changer transitions 0/162 dead transitions. [2024-06-20 16:08:55,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 162 transitions, 1660 flow [2024-06-20 16:08:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:08:55,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 16:08:55,078 INFO L175 Difference]: Start difference. First operand has 103 places, 133 transitions, 1254 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:08:55,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 162 transitions, 1660 flow [2024-06-20 16:08:55,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 162 transitions, 1468 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:55,154 INFO L231 Difference]: Finished difference. Result has 106 places, 133 transitions, 1214 flow [2024-06-20 16:08:55,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1214, PETRI_PLACES=106, PETRI_TRANSITIONS=133} [2024-06-20 16:08:55,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-20 16:08:55,155 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 133 transitions, 1214 flow [2024-06-20 16:08:55,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:55,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:55,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:55,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:08:55,156 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)] === [2024-06-20 16:08:55,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:55,156 INFO L85 PathProgramCache]: Analyzing trace with hash 921292435, now seen corresponding path program 2 times [2024-06-20 16:08:55,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:55,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916575004] [2024-06-20 16:08:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:55,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:55,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:55,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916575004] [2024-06-20 16:08:55,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916575004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:55,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:55,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550654664] [2024-06-20 16:08:55,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:55,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:55,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:55,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:55,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:55,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:55,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 133 transitions, 1214 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-20 16:08:55,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:55,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:55,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:56,337 INFO L124 PetriNetUnfolderBase]: 1997/3064 cut-off events. [2024-06-20 16:08:56,338 INFO L125 PetriNetUnfolderBase]: For 64920/64932 co-relation queries the response was YES. [2024-06-20 16:08:56,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17088 conditions, 3064 events. 1997/3064 cut-off events. For 64920/64932 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15226 event pairs, 610 based on Foata normal form. 13/3076 useless extension candidates. Maximal degree in co-relation 17041. Up to 2948 conditions per place. [2024-06-20 16:08:56,358 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 125 selfloop transitions, 18 changer transitions 0/147 dead transitions. [2024-06-20 16:08:56,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1574 flow [2024-06-20 16:08:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 16:08:56,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:08:56,360 INFO L175 Difference]: Start difference. First operand has 106 places, 133 transitions, 1214 flow. Second operand 6 states and 96 transitions. [2024-06-20 16:08:56,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1574 flow [2024-06-20 16:08:56,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 147 transitions, 1399 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:56,433 INFO L231 Difference]: Finished difference. Result has 105 places, 136 transitions, 1123 flow [2024-06-20 16:08:56,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1123, PETRI_PLACES=105, PETRI_TRANSITIONS=136} [2024-06-20 16:08:56,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-20 16:08:56,434 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 136 transitions, 1123 flow [2024-06-20 16:08:56,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-20 16:08:56,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:56,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:56,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:08:56,434 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:56,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:56,435 INFO L85 PathProgramCache]: Analyzing trace with hash 915584467, now seen corresponding path program 1 times [2024-06-20 16:08:56,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:56,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026826095] [2024-06-20 16:08:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:56,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:57,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026826095] [2024-06-20 16:08:57,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026826095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:57,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:57,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:57,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419692984] [2024-06-20 16:08:57,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:57,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:57,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:57,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:57,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:57,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:57,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 136 transitions, 1123 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:08:57,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:57,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:57,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:57,602 INFO L124 PetriNetUnfolderBase]: 1798/2838 cut-off events. [2024-06-20 16:08:57,603 INFO L125 PetriNetUnfolderBase]: For 58016/58018 co-relation queries the response was YES. [2024-06-20 16:08:57,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15417 conditions, 2838 events. 1798/2838 cut-off events. For 58016/58018 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14527 event pairs, 560 based on Foata normal form. 1/2838 useless extension candidates. Maximal degree in co-relation 15369. Up to 2681 conditions per place. [2024-06-20 16:08:57,619 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 135 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2024-06-20 16:08:57,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1481 flow [2024-06-20 16:08:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 16:08:57,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:08:57,620 INFO L175 Difference]: Start difference. First operand has 105 places, 136 transitions, 1123 flow. Second operand 6 states and 102 transitions. [2024-06-20 16:08:57,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1481 flow [2024-06-20 16:08:57,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 151 transitions, 1419 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:57,691 INFO L231 Difference]: Finished difference. Result has 107 places, 139 transitions, 1125 flow [2024-06-20 16:08:57,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1125, PETRI_PLACES=107, PETRI_TRANSITIONS=139} [2024-06-20 16:08:57,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-20 16:08:57,691 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 139 transitions, 1125 flow [2024-06-20 16:08:57,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:08:57,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:57,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:57,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:08:57,692 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:57,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:57,692 INFO L85 PathProgramCache]: Analyzing trace with hash 921298387, now seen corresponding path program 2 times [2024-06-20 16:08:57,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:57,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611631622] [2024-06-20 16:08:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:57,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:58,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611631622] [2024-06-20 16:08:58,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611631622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:58,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:58,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:08:58,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468001615] [2024-06-20 16:08:58,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:58,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:08:58,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:08:58,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:08:58,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:58,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 139 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:08:58,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:58,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:58,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:58,888 INFO L124 PetriNetUnfolderBase]: 1795/2835 cut-off events. [2024-06-20 16:08:58,889 INFO L125 PetriNetUnfolderBase]: For 60924/60928 co-relation queries the response was YES. [2024-06-20 16:08:58,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15728 conditions, 2835 events. 1795/2835 cut-off events. For 60924/60928 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14551 event pairs, 564 based on Foata normal form. 3/2837 useless extension candidates. Maximal degree in co-relation 15679. Up to 2671 conditions per place. [2024-06-20 16:08:58,908 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 130 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-06-20 16:08:58,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 151 transitions, 1479 flow [2024-06-20 16:08:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:08:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:08:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 16:08:58,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-20 16:08:58,909 INFO L175 Difference]: Start difference. First operand has 107 places, 139 transitions, 1125 flow. Second operand 6 states and 101 transitions. [2024-06-20 16:08:58,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 151 transitions, 1479 flow [2024-06-20 16:08:58,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 151 transitions, 1437 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:58,968 INFO L231 Difference]: Finished difference. Result has 109 places, 142 transitions, 1163 flow [2024-06-20 16:08:58,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1163, PETRI_PLACES=109, PETRI_TRANSITIONS=142} [2024-06-20 16:08:58,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-20 16:08:58,968 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 142 transitions, 1163 flow [2024-06-20 16:08:58,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:08:58,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:58,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:58,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:08:58,969 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:58,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:58,969 INFO L85 PathProgramCache]: Analyzing trace with hash -208401263, now seen corresponding path program 1 times [2024-06-20 16:08:58,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:58,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657176345] [2024-06-20 16:08:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:58,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:59,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:59,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657176345] [2024-06-20 16:08:59,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657176345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:59,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:59,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:59,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686037753] [2024-06-20 16:08:59,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:59,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:59,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:59,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:59,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:59,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:08:59,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 142 transitions, 1163 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:59,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:59,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:08:59,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:00,339 INFO L124 PetriNetUnfolderBase]: 2118/3263 cut-off events. [2024-06-20 16:09:00,339 INFO L125 PetriNetUnfolderBase]: For 88534/88536 co-relation queries the response was YES. [2024-06-20 16:09:00,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19054 conditions, 3263 events. 2118/3263 cut-off events. For 88534/88536 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16563 event pairs, 403 based on Foata normal form. 16/3277 useless extension candidates. Maximal degree in co-relation 19004. Up to 2043 conditions per place. [2024-06-20 16:09:00,361 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 111 selfloop transitions, 68 changer transitions 0/183 dead transitions. [2024-06-20 16:09:00,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 183 transitions, 1781 flow [2024-06-20 16:09:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:09:00,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-20 16:09:00,363 INFO L175 Difference]: Start difference. First operand has 109 places, 142 transitions, 1163 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:09:00,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 183 transitions, 1781 flow [2024-06-20 16:09:00,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 183 transitions, 1723 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:00,439 INFO L231 Difference]: Finished difference. Result has 113 places, 144 transitions, 1297 flow [2024-06-20 16:09:00,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1297, PETRI_PLACES=113, PETRI_TRANSITIONS=144} [2024-06-20 16:09:00,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-20 16:09:00,440 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 144 transitions, 1297 flow [2024-06-20 16:09:00,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:00,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:00,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:00,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:09:00,441 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:00,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:00,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1876856507, now seen corresponding path program 2 times [2024-06-20 16:09:00,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:00,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573484524] [2024-06-20 16:09:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:00,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:01,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:01,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573484524] [2024-06-20 16:09:01,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573484524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:01,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:01,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700223497] [2024-06-20 16:09:01,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:01,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:01,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:01,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 144 transitions, 1297 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:01,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:01,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:01,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:01,946 INFO L124 PetriNetUnfolderBase]: 2176/3363 cut-off events. [2024-06-20 16:09:01,946 INFO L125 PetriNetUnfolderBase]: For 96103/96105 co-relation queries the response was YES. [2024-06-20 16:09:01,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20093 conditions, 3363 events. 2176/3363 cut-off events. For 96103/96105 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17267 event pairs, 575 based on Foata normal form. 16/3377 useless extension candidates. Maximal degree in co-relation 20042. Up to 2550 conditions per place. [2024-06-20 16:09:01,968 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 108 selfloop transitions, 71 changer transitions 0/183 dead transitions. [2024-06-20 16:09:01,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 1799 flow [2024-06-20 16:09:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:09:01,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-20 16:09:01,970 INFO L175 Difference]: Start difference. First operand has 113 places, 144 transitions, 1297 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:09:01,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 1799 flow [2024-06-20 16:09:02,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 183 transitions, 1716 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:02,036 INFO L231 Difference]: Finished difference. Result has 117 places, 145 transitions, 1390 flow [2024-06-20 16:09:02,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1390, PETRI_PLACES=117, PETRI_TRANSITIONS=145} [2024-06-20 16:09:02,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-20 16:09:02,037 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 145 transitions, 1390 flow [2024-06-20 16:09:02,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:02,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:02,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:02,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:09:02,038 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:02,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:02,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1859266071, now seen corresponding path program 1 times [2024-06-20 16:09:02,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:02,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513946509] [2024-06-20 16:09:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:02,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:02,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:02,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513946509] [2024-06-20 16:09:02,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513946509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:02,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:02,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655772648] [2024-06-20 16:09:02,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:02,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:02,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:02,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:02,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 145 transitions, 1390 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:02,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:02,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:02,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:03,282 INFO L124 PetriNetUnfolderBase]: 2186/3385 cut-off events. [2024-06-20 16:09:03,282 INFO L125 PetriNetUnfolderBase]: For 98344/98352 co-relation queries the response was YES. [2024-06-20 16:09:03,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20701 conditions, 3385 events. 2186/3385 cut-off events. For 98344/98352 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17548 event pairs, 651 based on Foata normal form. 10/3394 useless extension candidates. Maximal degree in co-relation 20648. Up to 3150 conditions per place. [2024-06-20 16:09:03,304 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 35 changer transitions 0/172 dead transitions. [2024-06-20 16:09:03,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 172 transitions, 1852 flow [2024-06-20 16:09:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:09:03,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:09:03,305 INFO L175 Difference]: Start difference. First operand has 117 places, 145 transitions, 1390 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:09:03,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 172 transitions, 1852 flow [2024-06-20 16:09:03,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 172 transitions, 1694 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:03,385 INFO L231 Difference]: Finished difference. Result has 118 places, 149 transitions, 1366 flow [2024-06-20 16:09:03,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1366, PETRI_PLACES=118, PETRI_TRANSITIONS=149} [2024-06-20 16:09:03,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-20 16:09:03,385 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 149 transitions, 1366 flow [2024-06-20 16:09:03,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:03,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:03,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:03,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:09:03,386 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:03,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash -840776529, now seen corresponding path program 3 times [2024-06-20 16:09:03,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397103415] [2024-06-20 16:09:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:04,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:04,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397103415] [2024-06-20 16:09:04,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397103415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:04,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:04,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:04,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042125622] [2024-06-20 16:09:04,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:04,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:04,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:04,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:04,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:04,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:04,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 149 transitions, 1366 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:04,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:04,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:04,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:04,850 INFO L124 PetriNetUnfolderBase]: 2305/3603 cut-off events. [2024-06-20 16:09:04,850 INFO L125 PetriNetUnfolderBase]: For 114255/114261 co-relation queries the response was YES. [2024-06-20 16:09:04,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22194 conditions, 3603 events. 2305/3603 cut-off events. For 114255/114261 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19127 event pairs, 475 based on Foata normal form. 22/3623 useless extension candidates. Maximal degree in co-relation 22140. Up to 2667 conditions per place. [2024-06-20 16:09:04,918 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 73 changer transitions 0/194 dead transitions. [2024-06-20 16:09:04,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 194 transitions, 2044 flow [2024-06-20 16:09:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 16:09:04,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 16:09:04,921 INFO L175 Difference]: Start difference. First operand has 118 places, 149 transitions, 1366 flow. Second operand 8 states and 156 transitions. [2024-06-20 16:09:04,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 194 transitions, 2044 flow [2024-06-20 16:09:05,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 194 transitions, 1940 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:05,011 INFO L231 Difference]: Finished difference. Result has 121 places, 151 transitions, 1472 flow [2024-06-20 16:09:05,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1472, PETRI_PLACES=121, PETRI_TRANSITIONS=151} [2024-06-20 16:09:05,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-20 16:09:05,013 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 151 transitions, 1472 flow [2024-06-20 16:09:05,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:05,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:05,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:05,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:09:05,013 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:05,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:05,014 INFO L85 PathProgramCache]: Analyzing trace with hash -840628659, now seen corresponding path program 4 times [2024-06-20 16:09:05,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:05,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842083208] [2024-06-20 16:09:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:05,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:05,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:05,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842083208] [2024-06-20 16:09:05,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842083208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:05,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:05,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:05,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970181951] [2024-06-20 16:09:05,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:05,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:05,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:05,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:05,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 151 transitions, 1472 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:05,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:05,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:05,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:06,715 INFO L124 PetriNetUnfolderBase]: 2380/3728 cut-off events. [2024-06-20 16:09:06,715 INFO L125 PetriNetUnfolderBase]: For 125728/125734 co-relation queries the response was YES. [2024-06-20 16:09:06,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23318 conditions, 3728 events. 2380/3728 cut-off events. For 125728/125734 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20093 event pairs, 638 based on Foata normal form. 26/3752 useless extension candidates. Maximal degree in co-relation 23263. Up to 3043 conditions per place. [2024-06-20 16:09:06,740 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 70 changer transitions 0/191 dead transitions. [2024-06-20 16:09:06,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 2004 flow [2024-06-20 16:09:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:09:06,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-20 16:09:06,743 INFO L175 Difference]: Start difference. First operand has 121 places, 151 transitions, 1472 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:09:06,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 2004 flow [2024-06-20 16:09:06,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 191 transitions, 1898 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:06,866 INFO L231 Difference]: Finished difference. Result has 125 places, 152 transitions, 1547 flow [2024-06-20 16:09:06,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1547, PETRI_PLACES=125, PETRI_TRANSITIONS=152} [2024-06-20 16:09:06,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-20 16:09:06,867 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 152 transitions, 1547 flow [2024-06-20 16:09:06,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:06,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:06,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:06,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:09:06,868 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:06,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:06,868 INFO L85 PathProgramCache]: Analyzing trace with hash -835266279, now seen corresponding path program 5 times [2024-06-20 16:09:06,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:06,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408219175] [2024-06-20 16:09:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:06,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:07,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408219175] [2024-06-20 16:09:07,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408219175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:07,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:07,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:07,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835503667] [2024-06-20 16:09:07,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:07,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:07,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:07,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:07,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:07,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:07,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 152 transitions, 1547 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:07,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:07,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:07,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:08,524 INFO L124 PetriNetUnfolderBase]: 2455/3845 cut-off events. [2024-06-20 16:09:08,524 INFO L125 PetriNetUnfolderBase]: For 133423/133425 co-relation queries the response was YES. [2024-06-20 16:09:08,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24305 conditions, 3845 events. 2455/3845 cut-off events. For 133423/133425 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20903 event pairs, 634 based on Foata normal form. 20/3863 useless extension candidates. Maximal degree in co-relation 24248. Up to 3168 conditions per place. [2024-06-20 16:09:08,551 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 119 selfloop transitions, 66 changer transitions 0/189 dead transitions. [2024-06-20 16:09:08,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 189 transitions, 2063 flow [2024-06-20 16:09:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:09:08,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 16:09:08,553 INFO L175 Difference]: Start difference. First operand has 125 places, 152 transitions, 1547 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:09:08,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 189 transitions, 2063 flow [2024-06-20 16:09:08,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 189 transitions, 1912 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:08,702 INFO L231 Difference]: Finished difference. Result has 127 places, 153 transitions, 1569 flow [2024-06-20 16:09:08,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1569, PETRI_PLACES=127, PETRI_TRANSITIONS=153} [2024-06-20 16:09:08,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-20 16:09:08,702 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 153 transitions, 1569 flow [2024-06-20 16:09:08,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:08,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:08,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:08,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:09:08,703 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:08,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:08,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2021110109, now seen corresponding path program 1 times [2024-06-20 16:09:08,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:08,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215592976] [2024-06-20 16:09:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:08,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215592976] [2024-06-20 16:09:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215592976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:09,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:09,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:09,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727434025] [2024-06-20 16:09:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:09,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:09,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 153 transitions, 1569 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:09,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:09,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:09,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:10,332 INFO L124 PetriNetUnfolderBase]: 2496/3918 cut-off events. [2024-06-20 16:09:10,332 INFO L125 PetriNetUnfolderBase]: For 137723/137725 co-relation queries the response was YES. [2024-06-20 16:09:10,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24778 conditions, 3918 events. 2496/3918 cut-off events. For 137723/137725 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21509 event pairs, 640 based on Foata normal form. 12/3928 useless extension candidates. Maximal degree in co-relation 24720. Up to 2834 conditions per place. [2024-06-20 16:09:10,363 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 69 changer transitions 0/191 dead transitions. [2024-06-20 16:09:10,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 191 transitions, 2093 flow [2024-06-20 16:09:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:09:10,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:09:10,375 INFO L175 Difference]: Start difference. First operand has 127 places, 153 transitions, 1569 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:09:10,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 191 transitions, 2093 flow [2024-06-20 16:09:10,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 191 transitions, 1948 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:10,530 INFO L231 Difference]: Finished difference. Result has 129 places, 154 transitions, 1601 flow [2024-06-20 16:09:10,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1601, PETRI_PLACES=129, PETRI_TRANSITIONS=154} [2024-06-20 16:09:10,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-20 16:09:10,531 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 154 transitions, 1601 flow [2024-06-20 16:09:10,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:10,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:10,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:10,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:09:10,532 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)] === [2024-06-20 16:09:10,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:10,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1858967541, now seen corresponding path program 2 times [2024-06-20 16:09:10,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:10,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30345596] [2024-06-20 16:09:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:10,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:11,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:11,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30345596] [2024-06-20 16:09:11,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30345596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:11,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:11,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:11,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189571064] [2024-06-20 16:09:11,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:11,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:11,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:11,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:11,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:11,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:11,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 154 transitions, 1601 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:11,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:11,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:11,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:11,998 INFO L124 PetriNetUnfolderBase]: 2524/3967 cut-off events. [2024-06-20 16:09:11,999 INFO L125 PetriNetUnfolderBase]: For 140519/140523 co-relation queries the response was YES. [2024-06-20 16:09:12,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25255 conditions, 3967 events. 2524/3967 cut-off events. For 140519/140523 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21991 event pairs, 764 based on Foata normal form. 4/3970 useless extension candidates. Maximal degree in co-relation 25196. Up to 3673 conditions per place. [2024-06-20 16:09:12,028 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 38 changer transitions 0/179 dead transitions. [2024-06-20 16:09:12,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 179 transitions, 2179 flow [2024-06-20 16:09:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:09:12,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:09:12,029 INFO L175 Difference]: Start difference. First operand has 129 places, 154 transitions, 1601 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:09:12,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 179 transitions, 2179 flow [2024-06-20 16:09:12,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 179 transitions, 2022 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:12,171 INFO L231 Difference]: Finished difference. Result has 131 places, 162 transitions, 1665 flow [2024-06-20 16:09:12,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1665, PETRI_PLACES=131, PETRI_TRANSITIONS=162} [2024-06-20 16:09:12,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-20 16:09:12,172 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 162 transitions, 1665 flow [2024-06-20 16:09:12,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:12,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:12,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:12,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:09:12,173 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:12,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1858967169, now seen corresponding path program 1 times [2024-06-20 16:09:12,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:12,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365778513] [2024-06-20 16:09:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:13,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:13,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365778513] [2024-06-20 16:09:13,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365778513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:13,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:13,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:13,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93949364] [2024-06-20 16:09:13,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:13,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:13,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:13,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:13,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:13,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:13,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 162 transitions, 1665 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:13,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:13,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:13,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:13,799 INFO L124 PetriNetUnfolderBase]: 2529/3982 cut-off events. [2024-06-20 16:09:13,799 INFO L125 PetriNetUnfolderBase]: For 146473/146479 co-relation queries the response was YES. [2024-06-20 16:09:13,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25707 conditions, 3982 events. 2529/3982 cut-off events. For 146473/146479 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 22027 event pairs, 778 based on Foata normal form. 7/3988 useless extension candidates. Maximal degree in co-relation 25646. Up to 3835 conditions per place. [2024-06-20 16:09:13,831 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 16 changer transitions 0/182 dead transitions. [2024-06-20 16:09:13,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 182 transitions, 2119 flow [2024-06-20 16:09:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 16:09:13,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:09:13,832 INFO L175 Difference]: Start difference. First operand has 131 places, 162 transitions, 1665 flow. Second operand 7 states and 112 transitions. [2024-06-20 16:09:13,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 182 transitions, 2119 flow [2024-06-20 16:09:14,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 2033 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:14,040 INFO L231 Difference]: Finished difference. Result has 135 places, 165 transitions, 1665 flow [2024-06-20 16:09:14,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1665, PETRI_PLACES=135, PETRI_TRANSITIONS=165} [2024-06-20 16:09:14,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-20 16:09:14,040 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 165 transitions, 1665 flow [2024-06-20 16:09:14,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:14,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:14,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:14,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:09:14,041 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:14,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1093798499, now seen corresponding path program 6 times [2024-06-20 16:09:14,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:14,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601765565] [2024-06-20 16:09:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:14,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:14,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601765565] [2024-06-20 16:09:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601765565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:14,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:14,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:14,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242217009] [2024-06-20 16:09:14,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:14,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:14,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:14,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:14,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:14,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 165 transitions, 1665 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:14,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:14,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:14,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:15,516 INFO L124 PetriNetUnfolderBase]: 2493/3923 cut-off events. [2024-06-20 16:09:15,516 INFO L125 PetriNetUnfolderBase]: For 152217/152225 co-relation queries the response was YES. [2024-06-20 16:09:15,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25207 conditions, 3923 events. 2493/3923 cut-off events. For 152217/152225 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21572 event pairs, 649 based on Foata normal form. 23/3944 useless extension candidates. Maximal degree in co-relation 25144. Up to 3235 conditions per place. [2024-06-20 16:09:15,547 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 130 selfloop transitions, 63 changer transitions 0/197 dead transitions. [2024-06-20 16:09:15,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 197 transitions, 2159 flow [2024-06-20 16:09:15,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:09:15,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:09:15,548 INFO L175 Difference]: Start difference. First operand has 135 places, 165 transitions, 1665 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:09:15,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 197 transitions, 2159 flow [2024-06-20 16:09:15,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 197 transitions, 2083 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:15,736 INFO L231 Difference]: Finished difference. Result has 138 places, 165 transitions, 1724 flow [2024-06-20 16:09:15,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1724, PETRI_PLACES=138, PETRI_TRANSITIONS=165} [2024-06-20 16:09:15,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-20 16:09:15,737 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 165 transitions, 1724 flow [2024-06-20 16:09:15,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:15,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:15,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:15,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:09:15,738 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:15,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1731996317, now seen corresponding path program 2 times [2024-06-20 16:09:15,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:15,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191922033] [2024-06-20 16:09:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:15,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:16,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:16,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191922033] [2024-06-20 16:09:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191922033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:16,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476228975] [2024-06-20 16:09:16,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:16,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:16,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:16,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 165 transitions, 1724 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:16,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:16,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:16,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:17,238 INFO L124 PetriNetUnfolderBase]: 2473/3887 cut-off events. [2024-06-20 16:09:17,238 INFO L125 PetriNetUnfolderBase]: For 148544/148552 co-relation queries the response was YES. [2024-06-20 16:09:17,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25045 conditions, 3887 events. 2473/3887 cut-off events. For 148544/148552 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21294 event pairs, 626 based on Foata normal form. 15/3900 useless extension candidates. Maximal degree in co-relation 24981. Up to 3113 conditions per place. [2024-06-20 16:09:17,268 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 130 selfloop transitions, 65 changer transitions 0/199 dead transitions. [2024-06-20 16:09:17,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 199 transitions, 2232 flow [2024-06-20 16:09:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:09:17,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:09:17,270 INFO L175 Difference]: Start difference. First operand has 138 places, 165 transitions, 1724 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:09:17,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 199 transitions, 2232 flow [2024-06-20 16:09:17,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 199 transitions, 2077 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:17,438 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 1705 flow [2024-06-20 16:09:17,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1705, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2024-06-20 16:09:17,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-20 16:09:17,439 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 1705 flow [2024-06-20 16:09:17,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:17,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:17,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:17,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:09:17,440 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:17,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1732255787, now seen corresponding path program 3 times [2024-06-20 16:09:17,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:17,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311864277] [2024-06-20 16:09:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:17,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:18,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:18,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311864277] [2024-06-20 16:09:18,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311864277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:18,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:18,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136000086] [2024-06-20 16:09:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:18,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:18,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:18,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:18,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 1705 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:18,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:18,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:18,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:19,022 INFO L124 PetriNetUnfolderBase]: 2453/3855 cut-off events. [2024-06-20 16:09:19,023 INFO L125 PetriNetUnfolderBase]: For 147761/147769 co-relation queries the response was YES. [2024-06-20 16:09:19,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24503 conditions, 3855 events. 2453/3855 cut-off events. For 147761/147769 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21054 event pairs, 569 based on Foata normal form. 15/3868 useless extension candidates. Maximal degree in co-relation 24438. Up to 2431 conditions per place. [2024-06-20 16:09:19,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 73 changer transitions 0/198 dead transitions. [2024-06-20 16:09:19,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 198 transitions, 2149 flow [2024-06-20 16:09:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:09:19,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:09:19,053 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 1705 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:09:19,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 198 transitions, 2149 flow [2024-06-20 16:09:19,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 198 transitions, 1917 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 16:09:19,202 INFO L231 Difference]: Finished difference. Result has 138 places, 164 transitions, 1563 flow [2024-06-20 16:09:19,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=138, PETRI_TRANSITIONS=164} [2024-06-20 16:09:19,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-20 16:09:19,202 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 164 transitions, 1563 flow [2024-06-20 16:09:19,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:19,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:19,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:19,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:09:19,203 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)] === [2024-06-20 16:09:19,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:19,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1504288419, now seen corresponding path program 2 times [2024-06-20 16:09:19,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:19,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851049650] [2024-06-20 16:09:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:19,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:20,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:20,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851049650] [2024-06-20 16:09:20,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851049650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:20,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:20,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:20,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607926326] [2024-06-20 16:09:20,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:20,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:20,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:20,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:20,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:20,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:20,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 164 transitions, 1563 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:20,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:20,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:20,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:20,836 INFO L124 PetriNetUnfolderBase]: 2458/3874 cut-off events. [2024-06-20 16:09:20,836 INFO L125 PetriNetUnfolderBase]: For 147495/147507 co-relation queries the response was YES. [2024-06-20 16:09:20,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24293 conditions, 3874 events. 2458/3874 cut-off events. For 147495/147507 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21242 event pairs, 723 based on Foata normal form. 13/3886 useless extension candidates. Maximal degree in co-relation 24228. Up to 3706 conditions per place. [2024-06-20 16:09:20,934 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 153 selfloop transitions, 28 changer transitions 0/185 dead transitions. [2024-06-20 16:09:20,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 185 transitions, 2149 flow [2024-06-20 16:09:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-20 16:09:20,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-20 16:09:20,937 INFO L175 Difference]: Start difference. First operand has 138 places, 164 transitions, 1563 flow. Second operand 7 states and 109 transitions. [2024-06-20 16:09:20,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 185 transitions, 2149 flow [2024-06-20 16:09:21,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 185 transitions, 1944 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:21,071 INFO L231 Difference]: Finished difference. Result has 139 places, 172 transitions, 1545 flow [2024-06-20 16:09:21,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1545, PETRI_PLACES=139, PETRI_TRANSITIONS=172} [2024-06-20 16:09:21,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-20 16:09:21,072 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 172 transitions, 1545 flow [2024-06-20 16:09:21,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:21,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:21,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:21,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:09:21,072 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)] === [2024-06-20 16:09:21,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1070730169, now seen corresponding path program 3 times [2024-06-20 16:09:21,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:21,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114340207] [2024-06-20 16:09:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:21,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:22,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:22,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114340207] [2024-06-20 16:09:22,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114340207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:22,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:22,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:22,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715292349] [2024-06-20 16:09:22,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:22,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:22,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:22,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:22,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 172 transitions, 1545 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:22,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:22,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:22,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:22,778 INFO L124 PetriNetUnfolderBase]: 2455/3870 cut-off events. [2024-06-20 16:09:22,778 INFO L125 PetriNetUnfolderBase]: For 152847/152859 co-relation queries the response was YES. [2024-06-20 16:09:22,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23872 conditions, 3870 events. 2455/3870 cut-off events. For 152847/152859 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21208 event pairs, 723 based on Foata normal form. 13/3882 useless extension candidates. Maximal degree in co-relation 23806. Up to 3712 conditions per place. [2024-06-20 16:09:22,809 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 160 selfloop transitions, 21 changer transitions 0/185 dead transitions. [2024-06-20 16:09:22,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 185 transitions, 1954 flow [2024-06-20 16:09:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-20 16:09:22,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-20 16:09:22,811 INFO L175 Difference]: Start difference. First operand has 139 places, 172 transitions, 1545 flow. Second operand 7 states and 107 transitions. [2024-06-20 16:09:22,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 185 transitions, 1954 flow [2024-06-20 16:09:22,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 185 transitions, 1857 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:22,953 INFO L231 Difference]: Finished difference. Result has 143 places, 173 transitions, 1505 flow [2024-06-20 16:09:22,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1505, PETRI_PLACES=143, PETRI_TRANSITIONS=173} [2024-06-20 16:09:22,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-20 16:09:22,954 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 173 transitions, 1505 flow [2024-06-20 16:09:22,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:22,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:22,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:22,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:09:22,955 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:22,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1504704501, now seen corresponding path program 3 times [2024-06-20 16:09:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:22,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115001266] [2024-06-20 16:09:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:22,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:23,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115001266] [2024-06-20 16:09:23,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115001266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:23,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:23,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779969580] [2024-06-20 16:09:23,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:23,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:23,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 173 transitions, 1505 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:23,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:23,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:23,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:24,385 INFO L124 PetriNetUnfolderBase]: 2459/3865 cut-off events. [2024-06-20 16:09:24,385 INFO L125 PetriNetUnfolderBase]: For 159271/159279 co-relation queries the response was YES. [2024-06-20 16:09:24,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24026 conditions, 3865 events. 2459/3865 cut-off events. For 159271/159279 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21099 event pairs, 734 based on Foata normal form. 5/3868 useless extension candidates. Maximal degree in co-relation 23958. Up to 3538 conditions per place. [2024-06-20 16:09:24,414 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 139 selfloop transitions, 51 changer transitions 0/194 dead transitions. [2024-06-20 16:09:24,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 194 transitions, 2219 flow [2024-06-20 16:09:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:24,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:09:24,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-20 16:09:24,416 INFO L175 Difference]: Start difference. First operand has 143 places, 173 transitions, 1505 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:09:24,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 194 transitions, 2219 flow [2024-06-20 16:09:24,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 194 transitions, 2173 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:24,595 INFO L231 Difference]: Finished difference. Result has 146 places, 181 transitions, 1721 flow [2024-06-20 16:09:24,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1721, PETRI_PLACES=146, PETRI_TRANSITIONS=181} [2024-06-20 16:09:24,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-20 16:09:24,595 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 181 transitions, 1721 flow [2024-06-20 16:09:24,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:24,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:24,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:24,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:09:24,596 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:24,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1198824285, now seen corresponding path program 1 times [2024-06-20 16:09:24,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:24,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993987686] [2024-06-20 16:09:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:24,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:25,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:25,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993987686] [2024-06-20 16:09:25,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993987686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:25,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:25,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:25,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56340932] [2024-06-20 16:09:25,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:25,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:25,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:25,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:25,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 181 transitions, 1721 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:25,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:25,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:25,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:26,027 INFO L124 PetriNetUnfolderBase]: 2365/3770 cut-off events. [2024-06-20 16:09:26,028 INFO L125 PetriNetUnfolderBase]: For 170853/170855 co-relation queries the response was YES. [2024-06-20 16:09:26,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24433 conditions, 3770 events. 2365/3770 cut-off events. For 170853/170855 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20864 event pairs, 677 based on Foata normal form. 2/3771 useless extension candidates. Maximal degree in co-relation 24363. Up to 3537 conditions per place. [2024-06-20 16:09:26,061 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 17 changer transitions 0/204 dead transitions. [2024-06-20 16:09:26,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 204 transitions, 2219 flow [2024-06-20 16:09:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:09:26,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:09:26,062 INFO L175 Difference]: Start difference. First operand has 146 places, 181 transitions, 1721 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:09:26,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 204 transitions, 2219 flow [2024-06-20 16:09:26,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 204 transitions, 2057 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:26,239 INFO L231 Difference]: Finished difference. Result has 150 places, 187 transitions, 1669 flow [2024-06-20 16:09:26,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1561, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1669, PETRI_PLACES=150, PETRI_TRANSITIONS=187} [2024-06-20 16:09:26,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-20 16:09:26,240 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 187 transitions, 1669 flow [2024-06-20 16:09:26,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:26,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:26,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:26,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:09:26,240 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:26,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1510948707, now seen corresponding path program 1 times [2024-06-20 16:09:26,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:26,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584433739] [2024-06-20 16:09:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:26,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:27,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:27,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584433739] [2024-06-20 16:09:27,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584433739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:27,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:27,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:27,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862881255] [2024-06-20 16:09:27,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:27,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:27,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:27,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:27,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:27,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:27,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 187 transitions, 1669 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:27,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:27,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:27,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:27,806 INFO L124 PetriNetUnfolderBase]: 2375/3791 cut-off events. [2024-06-20 16:09:27,806 INFO L125 PetriNetUnfolderBase]: For 176851/176853 co-relation queries the response was YES. [2024-06-20 16:09:27,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24718 conditions, 3791 events. 2375/3791 cut-off events. For 176851/176853 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21084 event pairs, 675 based on Foata normal form. 2/3792 useless extension candidates. Maximal degree in co-relation 24646. Up to 3567 conditions per place. [2024-06-20 16:09:27,838 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 14 changer transitions 0/203 dead transitions. [2024-06-20 16:09:27,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 203 transitions, 2135 flow [2024-06-20 16:09:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 16:09:27,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-20 16:09:27,841 INFO L175 Difference]: Start difference. First operand has 150 places, 187 transitions, 1669 flow. Second operand 7 states and 114 transitions. [2024-06-20 16:09:27,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 203 transitions, 2135 flow [2024-06-20 16:09:28,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 203 transitions, 2083 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:28,016 INFO L231 Difference]: Finished difference. Result has 154 places, 190 transitions, 1697 flow [2024-06-20 16:09:28,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1697, PETRI_PLACES=154, PETRI_TRANSITIONS=190} [2024-06-20 16:09:28,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-20 16:09:28,018 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 190 transitions, 1697 flow [2024-06-20 16:09:28,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:28,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:28,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:28,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:09:28,018 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:28,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:28,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1681651323, now seen corresponding path program 2 times [2024-06-20 16:09:28,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:28,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896601896] [2024-06-20 16:09:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:28,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:28,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896601896] [2024-06-20 16:09:28,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896601896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:28,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:28,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148946834] [2024-06-20 16:09:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:28,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:28,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:28,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:28,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:28,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:28,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 190 transitions, 1697 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:28,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:28,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:28,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:29,482 INFO L124 PetriNetUnfolderBase]: 2393/3816 cut-off events. [2024-06-20 16:09:29,482 INFO L125 PetriNetUnfolderBase]: For 185548/185550 co-relation queries the response was YES. [2024-06-20 16:09:29,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25316 conditions, 3816 events. 2393/3816 cut-off events. For 185548/185550 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21169 event pairs, 675 based on Foata normal form. 2/3817 useless extension candidates. Maximal degree in co-relation 25243. Up to 3561 conditions per place. [2024-06-20 16:09:29,515 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 179 selfloop transitions, 24 changer transitions 0/212 dead transitions. [2024-06-20 16:09:29,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 212 transitions, 2335 flow [2024-06-20 16:09:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:09:29,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-20 16:09:29,516 INFO L175 Difference]: Start difference. First operand has 154 places, 190 transitions, 1697 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:09:29,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 212 transitions, 2335 flow [2024-06-20 16:09:29,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 212 transitions, 2277 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:29,727 INFO L231 Difference]: Finished difference. Result has 156 places, 196 transitions, 1795 flow [2024-06-20 16:09:29,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1795, PETRI_PLACES=156, PETRI_TRANSITIONS=196} [2024-06-20 16:09:29,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-20 16:09:29,728 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 196 transitions, 1795 flow [2024-06-20 16:09:29,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:29,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:29,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:09:29,728 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)] === [2024-06-20 16:09:29,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:29,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1504282467, now seen corresponding path program 2 times [2024-06-20 16:09:29,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:29,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598960219] [2024-06-20 16:09:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:29,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:30,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:30,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598960219] [2024-06-20 16:09:30,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598960219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:30,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:30,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:30,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234771018] [2024-06-20 16:09:30,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:30,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:30,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:30,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:30,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:30,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:30,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 196 transitions, 1795 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:30,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:30,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:30,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:31,245 INFO L124 PetriNetUnfolderBase]: 2405/3835 cut-off events. [2024-06-20 16:09:31,245 INFO L125 PetriNetUnfolderBase]: For 197229/197235 co-relation queries the response was YES. [2024-06-20 16:09:31,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25957 conditions, 3835 events. 2405/3835 cut-off events. For 197229/197235 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21320 event pairs, 698 based on Foata normal form. 7/3841 useless extension candidates. Maximal degree in co-relation 25883. Up to 3572 conditions per place. [2024-06-20 16:09:31,281 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 179 selfloop transitions, 28 changer transitions 0/216 dead transitions. [2024-06-20 16:09:31,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 216 transitions, 2457 flow [2024-06-20 16:09:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:09:31,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-20 16:09:31,282 INFO L175 Difference]: Start difference. First operand has 156 places, 196 transitions, 1795 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:09:31,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 216 transitions, 2457 flow [2024-06-20 16:09:31,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 216 transitions, 2385 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:31,522 INFO L231 Difference]: Finished difference. Result has 160 places, 203 transitions, 1924 flow [2024-06-20 16:09:31,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1924, PETRI_PLACES=160, PETRI_TRANSITIONS=203} [2024-06-20 16:09:31,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-20 16:09:31,522 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 203 transitions, 1924 flow [2024-06-20 16:09:31,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:31,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:31,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:31,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:09:31,523 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:31,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:31,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1504519617, now seen corresponding path program 3 times [2024-06-20 16:09:31,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:31,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198880198] [2024-06-20 16:09:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:31,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:32,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:32,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198880198] [2024-06-20 16:09:32,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198880198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:32,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:32,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:32,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821651671] [2024-06-20 16:09:32,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:32,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:32,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:32,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:32,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 203 transitions, 1924 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:32,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:32,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:32,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:33,173 INFO L124 PetriNetUnfolderBase]: 2404/3835 cut-off events. [2024-06-20 16:09:33,174 INFO L125 PetriNetUnfolderBase]: For 203865/203871 co-relation queries the response was YES. [2024-06-20 16:09:33,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26280 conditions, 3835 events. 2404/3835 cut-off events. For 203865/203871 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21323 event pairs, 680 based on Foata normal form. 7/3841 useless extension candidates. Maximal degree in co-relation 26204. Up to 3600 conditions per place. [2024-06-20 16:09:33,205 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 189 selfloop transitions, 19 changer transitions 0/217 dead transitions. [2024-06-20 16:09:33,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 217 transitions, 2425 flow [2024-06-20 16:09:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 16:09:33,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-20 16:09:33,206 INFO L175 Difference]: Start difference. First operand has 160 places, 203 transitions, 1924 flow. Second operand 7 states and 114 transitions. [2024-06-20 16:09:33,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 217 transitions, 2425 flow [2024-06-20 16:09:33,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 217 transitions, 2361 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:33,441 INFO L231 Difference]: Finished difference. Result has 164 places, 206 transitions, 1961 flow [2024-06-20 16:09:33,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1961, PETRI_PLACES=164, PETRI_TRANSITIONS=206} [2024-06-20 16:09:33,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-20 16:09:33,441 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 206 transitions, 1961 flow [2024-06-20 16:09:33,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:33,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:33,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:33,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:09:33,442 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)] === [2024-06-20 16:09:33,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:33,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1504519803, now seen corresponding path program 3 times [2024-06-20 16:09:33,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:33,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880063266] [2024-06-20 16:09:33,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:33,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:34,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:34,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880063266] [2024-06-20 16:09:34,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880063266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:34,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:34,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:34,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48551216] [2024-06-20 16:09:34,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:34,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:34,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:34,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:34,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:34,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:34,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 206 transitions, 1961 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:34,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:34,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:34,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:34,965 INFO L124 PetriNetUnfolderBase]: 2371/3801 cut-off events. [2024-06-20 16:09:34,965 INFO L125 PetriNetUnfolderBase]: For 209254/209258 co-relation queries the response was YES. [2024-06-20 16:09:34,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26107 conditions, 3801 events. 2371/3801 cut-off events. For 209254/209258 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21300 event pairs, 669 based on Foata normal form. 2/3802 useless extension candidates. Maximal degree in co-relation 26029. Up to 3531 conditions per place. [2024-06-20 16:09:35,003 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 182 selfloop transitions, 31 changer transitions 0/222 dead transitions. [2024-06-20 16:09:35,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 222 transitions, 2573 flow [2024-06-20 16:09:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:09:35,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:09:35,006 INFO L175 Difference]: Start difference. First operand has 164 places, 206 transitions, 1961 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:09:35,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 222 transitions, 2573 flow [2024-06-20 16:09:35,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 222 transitions, 2517 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:35,310 INFO L231 Difference]: Finished difference. Result has 166 places, 209 transitions, 2033 flow [2024-06-20 16:09:35,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2033, PETRI_PLACES=166, PETRI_TRANSITIONS=209} [2024-06-20 16:09:35,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-20 16:09:35,310 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 209 transitions, 2033 flow [2024-06-20 16:09:35,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:35,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:35,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:35,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:09:35,311 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)] === [2024-06-20 16:09:35,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1504273539, now seen corresponding path program 1 times [2024-06-20 16:09:35,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:35,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92942965] [2024-06-20 16:09:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:35,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:36,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:36,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92942965] [2024-06-20 16:09:36,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92942965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:36,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:36,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:36,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638037373] [2024-06-20 16:09:36,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:36,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:36,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:36,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:36,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:36,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 209 transitions, 2033 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:36,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:36,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:36,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:37,187 INFO L124 PetriNetUnfolderBase]: 2502/3928 cut-off events. [2024-06-20 16:09:37,188 INFO L125 PetriNetUnfolderBase]: For 213722/213724 co-relation queries the response was YES. [2024-06-20 16:09:37,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27218 conditions, 3928 events. 2502/3928 cut-off events. For 213722/213724 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21448 event pairs, 708 based on Foata normal form. 1/3928 useless extension candidates. Maximal degree in co-relation 27139. Up to 3801 conditions per place. [2024-06-20 16:09:37,223 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 201 selfloop transitions, 16 changer transitions 0/221 dead transitions. [2024-06-20 16:09:37,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 221 transitions, 2527 flow [2024-06-20 16:09:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-20 16:09:37,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-20 16:09:37,225 INFO L175 Difference]: Start difference. First operand has 166 places, 209 transitions, 2033 flow. Second operand 7 states and 106 transitions. [2024-06-20 16:09:37,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 221 transitions, 2527 flow [2024-06-20 16:09:37,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 221 transitions, 2421 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:37,538 INFO L231 Difference]: Finished difference. Result has 168 places, 211 transitions, 2003 flow [2024-06-20 16:09:37,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2003, PETRI_PLACES=168, PETRI_TRANSITIONS=211} [2024-06-20 16:09:37,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-20 16:09:37,539 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 211 transitions, 2003 flow [2024-06-20 16:09:37,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:37,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:37,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:37,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:09:37,539 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)] === [2024-06-20 16:09:37,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:37,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1802671895, now seen corresponding path program 1 times [2024-06-20 16:09:37,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:37,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971025619] [2024-06-20 16:09:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:37,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:38,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:38,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971025619] [2024-06-20 16:09:38,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971025619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:38,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:38,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451919665] [2024-06-20 16:09:38,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:38,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:38,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:38,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:38,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:38,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 211 transitions, 2003 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:38,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:38,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:38,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:39,296 INFO L124 PetriNetUnfolderBase]: 2512/3945 cut-off events. [2024-06-20 16:09:39,296 INFO L125 PetriNetUnfolderBase]: For 222820/222830 co-relation queries the response was YES. [2024-06-20 16:09:39,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27367 conditions, 3945 events. 2512/3945 cut-off events. For 222820/222830 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21595 event pairs, 655 based on Foata normal form. 12/3956 useless extension candidates. Maximal degree in co-relation 27287. Up to 3676 conditions per place. [2024-06-20 16:09:39,333 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 39 changer transitions 0/239 dead transitions. [2024-06-20 16:09:39,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 239 transitions, 2619 flow [2024-06-20 16:09:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:09:39,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 16:09:39,334 INFO L175 Difference]: Start difference. First operand has 168 places, 211 transitions, 2003 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:09:39,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 239 transitions, 2619 flow [2024-06-20 16:09:39,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 239 transitions, 2521 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:39,597 INFO L231 Difference]: Finished difference. Result has 170 places, 215 transitions, 2064 flow [2024-06-20 16:09:39,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2064, PETRI_PLACES=170, PETRI_TRANSITIONS=215} [2024-06-20 16:09:39,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-20 16:09:39,598 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 215 transitions, 2064 flow [2024-06-20 16:09:39,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:39,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:39,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:39,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:09:39,599 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)] === [2024-06-20 16:09:39,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1839694038, now seen corresponding path program 1 times [2024-06-20 16:09:39,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:39,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007571782] [2024-06-20 16:09:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:39,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:40,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007571782] [2024-06-20 16:09:40,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007571782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:40,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:40,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:40,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964838300] [2024-06-20 16:09:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:40,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:40,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:40,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:40,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 215 transitions, 2064 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:40,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:40,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:40,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:40,995 INFO L124 PetriNetUnfolderBase]: 2522/3952 cut-off events. [2024-06-20 16:09:40,995 INFO L125 PetriNetUnfolderBase]: For 231800/231806 co-relation queries the response was YES. [2024-06-20 16:09:41,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28140 conditions, 3952 events. 2522/3952 cut-off events. For 231800/231806 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21595 event pairs, 662 based on Foata normal form. 6/3957 useless extension candidates. Maximal degree in co-relation 28060. Up to 3692 conditions per place. [2024-06-20 16:09:41,031 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 200 selfloop transitions, 35 changer transitions 0/239 dead transitions. [2024-06-20 16:09:41,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 239 transitions, 2655 flow [2024-06-20 16:09:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:09:41,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:09:41,032 INFO L175 Difference]: Start difference. First operand has 170 places, 215 transitions, 2064 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:09:41,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 239 transitions, 2655 flow [2024-06-20 16:09:41,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 239 transitions, 2524 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:41,265 INFO L231 Difference]: Finished difference. Result has 171 places, 219 transitions, 2075 flow [2024-06-20 16:09:41,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2075, PETRI_PLACES=171, PETRI_TRANSITIONS=219} [2024-06-20 16:09:41,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-20 16:09:41,275 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 219 transitions, 2075 flow [2024-06-20 16:09:41,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:41,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:41,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:41,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:09:41,276 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:41,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1793413838, now seen corresponding path program 2 times [2024-06-20 16:09:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:41,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112451694] [2024-06-20 16:09:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:41,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:42,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:42,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112451694] [2024-06-20 16:09:42,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112451694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:42,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:42,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:42,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193017973] [2024-06-20 16:09:42,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:42,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:42,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:42,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:42,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:42,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:42,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 219 transitions, 2075 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:42,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:42,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:42,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:42,736 INFO L124 PetriNetUnfolderBase]: 2524/3956 cut-off events. [2024-06-20 16:09:42,736 INFO L125 PetriNetUnfolderBase]: For 239076/239082 co-relation queries the response was YES. [2024-06-20 16:09:42,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28238 conditions, 3956 events. 2524/3956 cut-off events. For 239076/239082 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21621 event pairs, 663 based on Foata normal form. 6/3961 useless extension candidates. Maximal degree in co-relation 28157. Up to 3655 conditions per place. [2024-06-20 16:09:42,769 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 44 changer transitions 0/239 dead transitions. [2024-06-20 16:09:42,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 239 transitions, 2753 flow [2024-06-20 16:09:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:09:42,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-20 16:09:42,771 INFO L175 Difference]: Start difference. First operand has 171 places, 219 transitions, 2075 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:09:42,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 239 transitions, 2753 flow [2024-06-20 16:09:43,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 239 transitions, 2656 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:43,107 INFO L231 Difference]: Finished difference. Result has 173 places, 222 transitions, 2131 flow [2024-06-20 16:09:43,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2131, PETRI_PLACES=173, PETRI_TRANSITIONS=222} [2024-06-20 16:09:43,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-20 16:09:43,108 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 222 transitions, 2131 flow [2024-06-20 16:09:43,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:43,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:43,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:43,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:09:43,109 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:43,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:43,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1793417465, now seen corresponding path program 2 times [2024-06-20 16:09:43,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:43,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130759241] [2024-06-20 16:09:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:43,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:44,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:44,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130759241] [2024-06-20 16:09:44,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130759241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:44,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:44,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:44,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645656348] [2024-06-20 16:09:44,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:44,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:44,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:44,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:44,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:44,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:44,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 222 transitions, 2131 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:44,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:44,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:44,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:44,853 INFO L124 PetriNetUnfolderBase]: 2536/3975 cut-off events. [2024-06-20 16:09:44,853 INFO L125 PetriNetUnfolderBase]: For 248680/248686 co-relation queries the response was YES. [2024-06-20 16:09:44,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28532 conditions, 3975 events. 2536/3975 cut-off events. For 248680/248686 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21778 event pairs, 663 based on Foata normal form. 6/3980 useless extension candidates. Maximal degree in co-relation 28450. Up to 3665 conditions per place. [2024-06-20 16:09:44,891 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 191 selfloop transitions, 49 changer transitions 0/244 dead transitions. [2024-06-20 16:09:44,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 244 transitions, 2843 flow [2024-06-20 16:09:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:09:44,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 16:09:44,893 INFO L175 Difference]: Start difference. First operand has 173 places, 222 transitions, 2131 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:09:44,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 244 transitions, 2843 flow [2024-06-20 16:09:45,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 244 transitions, 2745 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:45,365 INFO L231 Difference]: Finished difference. Result has 177 places, 226 transitions, 2220 flow [2024-06-20 16:09:45,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2033, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2220, PETRI_PLACES=177, PETRI_TRANSITIONS=226} [2024-06-20 16:09:45,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-20 16:09:45,366 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 226 transitions, 2220 flow [2024-06-20 16:09:45,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:45,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:45,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:45,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:09:45,367 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:45,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:45,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1793406305, now seen corresponding path program 3 times [2024-06-20 16:09:45,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:45,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638258936] [2024-06-20 16:09:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:45,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:46,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:46,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638258936] [2024-06-20 16:09:46,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638258936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:46,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:46,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209720990] [2024-06-20 16:09:46,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:46,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:46,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:46,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:46,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 226 transitions, 2220 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:46,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:46,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:46,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:47,092 INFO L124 PetriNetUnfolderBase]: 2564/4019 cut-off events. [2024-06-20 16:09:47,092 INFO L125 PetriNetUnfolderBase]: For 261285/261291 co-relation queries the response was YES. [2024-06-20 16:09:47,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29551 conditions, 4019 events. 2564/4019 cut-off events. For 261285/261291 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 22086 event pairs, 663 based on Foata normal form. 6/4024 useless extension candidates. Maximal degree in co-relation 29468. Up to 3665 conditions per place. [2024-06-20 16:09:47,132 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 56 changer transitions 0/253 dead transitions. [2024-06-20 16:09:47,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 253 transitions, 3140 flow [2024-06-20 16:09:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:09:47,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:09:47,133 INFO L175 Difference]: Start difference. First operand has 177 places, 226 transitions, 2220 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:09:47,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 253 transitions, 3140 flow [2024-06-20 16:09:47,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 253 transitions, 2981 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:47,579 INFO L231 Difference]: Finished difference. Result has 180 places, 234 transitions, 2364 flow [2024-06-20 16:09:47,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2364, PETRI_PLACES=180, PETRI_TRANSITIONS=234} [2024-06-20 16:09:47,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-20 16:09:47,580 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 234 transitions, 2364 flow [2024-06-20 16:09:47,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:47,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:47,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:47,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:09:47,581 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)] === [2024-06-20 16:09:47,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash 227915796, now seen corresponding path program 1 times [2024-06-20 16:09:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:47,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930285901] [2024-06-20 16:09:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:47,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:48,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:48,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930285901] [2024-06-20 16:09:48,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930285901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:48,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:48,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:48,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117227983] [2024-06-20 16:09:48,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:48,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:48,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:48,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:48,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 234 transitions, 2364 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:48,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:48,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:48,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:49,454 INFO L124 PetriNetUnfolderBase]: 2569/4031 cut-off events. [2024-06-20 16:09:49,455 INFO L125 PetriNetUnfolderBase]: For 269690/269696 co-relation queries the response was YES. [2024-06-20 16:09:49,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30304 conditions, 4031 events. 2569/4031 cut-off events. For 269690/269696 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 22070 event pairs, 677 based on Foata normal form. 7/4037 useless extension candidates. Maximal degree in co-relation 30219. Up to 3876 conditions per place. [2024-06-20 16:09:49,496 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 232 selfloop transitions, 19 changer transitions 0/255 dead transitions. [2024-06-20 16:09:49,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 255 transitions, 2992 flow [2024-06-20 16:09:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 16:09:49,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:09:49,502 INFO L175 Difference]: Start difference. First operand has 180 places, 234 transitions, 2364 flow. Second operand 8 states and 123 transitions. [2024-06-20 16:09:49,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 255 transitions, 2992 flow [2024-06-20 16:09:50,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 255 transitions, 2846 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:50,060 INFO L231 Difference]: Finished difference. Result has 184 places, 237 transitions, 2336 flow [2024-06-20 16:09:50,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2336, PETRI_PLACES=184, PETRI_TRANSITIONS=237} [2024-06-20 16:09:50,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-20 16:09:50,061 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 237 transitions, 2336 flow [2024-06-20 16:09:50,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:50,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:50,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:50,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:09:50,062 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)] === [2024-06-20 16:09:50,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:50,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1492921342, now seen corresponding path program 3 times [2024-06-20 16:09:50,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:50,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043240803] [2024-06-20 16:09:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:50,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:50,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:50,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043240803] [2024-06-20 16:09:50,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043240803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:50,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:50,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:50,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808906737] [2024-06-20 16:09:50,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:50,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:50,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:50,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:50,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:50,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:50,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 237 transitions, 2336 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:50,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:50,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:50,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:51,452 INFO L124 PetriNetUnfolderBase]: 2562/4011 cut-off events. [2024-06-20 16:09:51,452 INFO L125 PetriNetUnfolderBase]: For 276201/276207 co-relation queries the response was YES. [2024-06-20 16:09:51,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30471 conditions, 4011 events. 2562/4011 cut-off events. For 276201/276207 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21844 event pairs, 666 based on Foata normal form. 2/4009 useless extension candidates. Maximal degree in co-relation 30384. Up to 3757 conditions per place. [2024-06-20 16:09:51,491 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 216 selfloop transitions, 35 changer transitions 0/255 dead transitions. [2024-06-20 16:09:51,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 255 transitions, 2900 flow [2024-06-20 16:09:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:09:51,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-20 16:09:51,492 INFO L175 Difference]: Start difference. First operand has 184 places, 237 transitions, 2336 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:09:51,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 255 transitions, 2900 flow [2024-06-20 16:09:52,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 255 transitions, 2780 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:52,028 INFO L231 Difference]: Finished difference. Result has 185 places, 237 transitions, 2293 flow [2024-06-20 16:09:52,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2293, PETRI_PLACES=185, PETRI_TRANSITIONS=237} [2024-06-20 16:09:52,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-20 16:09:52,029 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 237 transitions, 2293 flow [2024-06-20 16:09:52,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:52,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:52,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:52,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:09:52,030 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)] === [2024-06-20 16:09:52,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:52,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2050423668, now seen corresponding path program 4 times [2024-06-20 16:09:52,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:52,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264315695] [2024-06-20 16:09:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:52,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:52,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:52,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264315695] [2024-06-20 16:09:52,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264315695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:52,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:52,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126815377] [2024-06-20 16:09:52,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:52,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:52,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:52,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:52,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:52,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:52,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 237 transitions, 2293 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:52,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:52,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:52,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:53,504 INFO L124 PetriNetUnfolderBase]: 2567/4016 cut-off events. [2024-06-20 16:09:53,504 INFO L125 PetriNetUnfolderBase]: For 285469/285475 co-relation queries the response was YES. [2024-06-20 16:09:53,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30739 conditions, 4016 events. 2567/4016 cut-off events. For 285469/285475 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21895 event pairs, 662 based on Foata normal form. 2/4014 useless extension candidates. Maximal degree in co-relation 30651. Up to 3744 conditions per place. [2024-06-20 16:09:53,544 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 207 selfloop transitions, 44 changer transitions 0/255 dead transitions. [2024-06-20 16:09:53,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 255 transitions, 2897 flow [2024-06-20 16:09:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:09:53,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-20 16:09:53,546 INFO L175 Difference]: Start difference. First operand has 185 places, 237 transitions, 2293 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:09:53,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 255 transitions, 2897 flow [2024-06-20 16:09:53,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 255 transitions, 2765 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:53,996 INFO L231 Difference]: Finished difference. Result has 185 places, 240 transitions, 2313 flow [2024-06-20 16:09:53,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2161, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2313, PETRI_PLACES=185, PETRI_TRANSITIONS=240} [2024-06-20 16:09:53,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-20 16:09:53,997 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 240 transitions, 2313 flow [2024-06-20 16:09:53,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:53,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:53,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:53,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:09:53,997 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:53,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:53,998 INFO L85 PathProgramCache]: Analyzing trace with hash 474573810, now seen corresponding path program 5 times [2024-06-20 16:09:53,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:53,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921829771] [2024-06-20 16:09:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:53,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:54,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921829771] [2024-06-20 16:09:54,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921829771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:54,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:54,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:54,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519350239] [2024-06-20 16:09:54,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:54,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:54,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:54,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:54,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:54,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 240 transitions, 2313 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:54,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:54,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:54,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:55,424 INFO L124 PetriNetUnfolderBase]: 2569/4028 cut-off events. [2024-06-20 16:09:55,424 INFO L125 PetriNetUnfolderBase]: For 295302/295312 co-relation queries the response was YES. [2024-06-20 16:09:55,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30872 conditions, 4028 events. 2569/4028 cut-off events. For 295302/295312 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 22024 event pairs, 685 based on Foata normal form. 7/4033 useless extension candidates. Maximal degree in co-relation 30783. Up to 3684 conditions per place. [2024-06-20 16:09:55,463 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 60 changer transitions 0/255 dead transitions. [2024-06-20 16:09:55,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 255 transitions, 3023 flow [2024-06-20 16:09:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:09:55,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-20 16:09:55,465 INFO L175 Difference]: Start difference. First operand has 185 places, 240 transitions, 2313 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:09:55,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 255 transitions, 3023 flow [2024-06-20 16:09:56,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 255 transitions, 2903 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:56,057 INFO L231 Difference]: Finished difference. Result has 187 places, 243 transitions, 2381 flow [2024-06-20 16:09:56,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2381, PETRI_PLACES=187, PETRI_TRANSITIONS=243} [2024-06-20 16:09:56,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-20 16:09:56,058 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 243 transitions, 2381 flow [2024-06-20 16:09:56,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:56,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:56,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:56,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:09:56,059 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:56,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:56,059 INFO L85 PathProgramCache]: Analyzing trace with hash 604519730, now seen corresponding path program 6 times [2024-06-20 16:09:56,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:56,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849983731] [2024-06-20 16:09:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:56,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:56,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:56,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849983731] [2024-06-20 16:09:56,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849983731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:56,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:56,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:56,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709637642] [2024-06-20 16:09:56,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:56,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:56,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:56,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:56,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:56,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 243 transitions, 2381 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:56,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:56,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:56,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:57,515 INFO L124 PetriNetUnfolderBase]: 2564/4018 cut-off events. [2024-06-20 16:09:57,515 INFO L125 PetriNetUnfolderBase]: For 301858/301868 co-relation queries the response was YES. [2024-06-20 16:09:57,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30937 conditions, 4018 events. 2564/4018 cut-off events. For 301858/301868 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21975 event pairs, 684 based on Foata normal form. 6/4022 useless extension candidates. Maximal degree in co-relation 30847. Up to 3679 conditions per place. [2024-06-20 16:09:57,555 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 64 changer transitions 0/254 dead transitions. [2024-06-20 16:09:57,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 254 transitions, 2915 flow [2024-06-20 16:09:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 16:09:57,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-20 16:09:57,557 INFO L175 Difference]: Start difference. First operand has 187 places, 243 transitions, 2381 flow. Second operand 7 states and 113 transitions. [2024-06-20 16:09:57,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 254 transitions, 2915 flow [2024-06-20 16:09:58,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 254 transitions, 2741 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:58,080 INFO L231 Difference]: Finished difference. Result has 190 places, 243 transitions, 2341 flow [2024-06-20 16:09:58,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2341, PETRI_PLACES=190, PETRI_TRANSITIONS=243} [2024-06-20 16:09:58,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-20 16:09:58,081 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 243 transitions, 2341 flow [2024-06-20 16:09:58,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:58,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:58,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:58,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:09:58,082 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:58,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash 611700756, now seen corresponding path program 2 times [2024-06-20 16:09:58,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:58,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695551168] [2024-06-20 16:09:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:58,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:59,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:59,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695551168] [2024-06-20 16:09:59,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695551168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:59,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:59,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:59,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708465546] [2024-06-20 16:09:59,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:59,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:59,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:59,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:59,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:59,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:09:59,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 243 transitions, 2341 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:59,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:59,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:09:59,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:59,887 INFO L124 PetriNetUnfolderBase]: 2577/4045 cut-off events. [2024-06-20 16:09:59,888 INFO L125 PetriNetUnfolderBase]: For 313243/313255 co-relation queries the response was YES. [2024-06-20 16:09:59,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31309 conditions, 4045 events. 2577/4045 cut-off events. For 313243/313255 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 22121 event pairs, 671 based on Foata normal form. 13/4057 useless extension candidates. Maximal degree in co-relation 31218. Up to 3858 conditions per place. [2024-06-20 16:09:59,928 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 222 selfloop transitions, 41 changer transitions 0/267 dead transitions. [2024-06-20 16:09:59,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 267 transitions, 3371 flow [2024-06-20 16:09:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 16:09:59,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-20 16:09:59,929 INFO L175 Difference]: Start difference. First operand has 190 places, 243 transitions, 2341 flow. Second operand 8 states and 124 transitions. [2024-06-20 16:09:59,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 267 transitions, 3371 flow [2024-06-20 16:10:00,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 267 transitions, 3203 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:00,477 INFO L231 Difference]: Finished difference. Result has 191 places, 252 transitions, 2489 flow [2024-06-20 16:10:00,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2489, PETRI_PLACES=191, PETRI_TRANSITIONS=252} [2024-06-20 16:10:00,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-20 16:10:00,478 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 252 transitions, 2489 flow [2024-06-20 16:10:00,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:00,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:00,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:00,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:10:00,478 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:00,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1167113203, now seen corresponding path program 4 times [2024-06-20 16:10:00,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:00,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871955200] [2024-06-20 16:10:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:00,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:01,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:01,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871955200] [2024-06-20 16:10:01,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871955200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:01,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:01,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:01,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423604205] [2024-06-20 16:10:01,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:01,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:01,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:01,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:01,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 252 transitions, 2489 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:01,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:01,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:01,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:02,179 INFO L124 PetriNetUnfolderBase]: 2587/4052 cut-off events. [2024-06-20 16:10:02,179 INFO L125 PetriNetUnfolderBase]: For 326996/327006 co-relation queries the response was YES. [2024-06-20 16:10:02,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31717 conditions, 4052 events. 2587/4052 cut-off events. For 326996/327006 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22125 event pairs, 685 based on Foata normal form. 7/4057 useless extension candidates. Maximal degree in co-relation 31625. Up to 3705 conditions per place. [2024-06-20 16:10:02,226 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 198 selfloop transitions, 66 changer transitions 0/268 dead transitions. [2024-06-20 16:10:02,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 268 transitions, 3147 flow [2024-06-20 16:10:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:10:02,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-20 16:10:02,237 INFO L175 Difference]: Start difference. First operand has 191 places, 252 transitions, 2489 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:10:02,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 268 transitions, 3147 flow [2024-06-20 16:10:02,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 268 transitions, 3042 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-20 16:10:02,777 INFO L231 Difference]: Finished difference. Result has 196 places, 256 transitions, 2625 flow [2024-06-20 16:10:02,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2625, PETRI_PLACES=196, PETRI_TRANSITIONS=256} [2024-06-20 16:10:02,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-20 16:10:02,778 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 256 transitions, 2625 flow [2024-06-20 16:10:02,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:02,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:02,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:02,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:10:02,779 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:02,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:02,779 INFO L85 PathProgramCache]: Analyzing trace with hash 611700353, now seen corresponding path program 5 times [2024-06-20 16:10:02,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:02,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306400916] [2024-06-20 16:10:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:02,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:03,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:03,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306400916] [2024-06-20 16:10:03,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306400916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:03,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:03,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:03,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187668221] [2024-06-20 16:10:03,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:03,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:03,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:03,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:03,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 256 transitions, 2625 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:03,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:03,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:03,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:04,616 INFO L124 PetriNetUnfolderBase]: 2615/4096 cut-off events. [2024-06-20 16:10:04,616 INFO L125 PetriNetUnfolderBase]: For 341757/341767 co-relation queries the response was YES. [2024-06-20 16:10:04,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32966 conditions, 4096 events. 2615/4096 cut-off events. For 341757/341767 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22415 event pairs, 683 based on Foata normal form. 7/4101 useless extension candidates. Maximal degree in co-relation 32872. Up to 3635 conditions per place. [2024-06-20 16:10:04,659 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 92 changer transitions 0/289 dead transitions. [2024-06-20 16:10:04,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 289 transitions, 3853 flow [2024-06-20 16:10:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:10:04,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 16:10:04,661 INFO L175 Difference]: Start difference. First operand has 196 places, 256 transitions, 2625 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:10:04,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 289 transitions, 3853 flow [2024-06-20 16:10:05,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 289 transitions, 3640 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:05,137 INFO L231 Difference]: Finished difference. Result has 200 places, 273 transitions, 2981 flow [2024-06-20 16:10:05,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2981, PETRI_PLACES=200, PETRI_TRANSITIONS=273} [2024-06-20 16:10:05,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-20 16:10:05,137 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 273 transitions, 2981 flow [2024-06-20 16:10:05,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:05,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:05,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:05,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:10:05,138 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:05,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:05,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1418675832, now seen corresponding path program 3 times [2024-06-20 16:10:05,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:05,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491574409] [2024-06-20 16:10:05,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:05,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:06,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491574409] [2024-06-20 16:10:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491574409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:06,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:06,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:06,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501064022] [2024-06-20 16:10:06,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:06,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:06,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:06,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:06,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 273 transitions, 2981 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:06,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:06,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:06,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:06,945 INFO L124 PetriNetUnfolderBase]: 2617/4108 cut-off events. [2024-06-20 16:10:06,946 INFO L125 PetriNetUnfolderBase]: For 354912/354924 co-relation queries the response was YES. [2024-06-20 16:10:06,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33770 conditions, 4108 events. 2617/4108 cut-off events. For 354912/354924 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22541 event pairs, 671 based on Foata normal form. 14/4121 useless extension candidates. Maximal degree in co-relation 33673. Up to 3934 conditions per place. [2024-06-20 16:10:06,987 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 259 selfloop transitions, 26 changer transitions 0/289 dead transitions. [2024-06-20 16:10:06,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 289 transitions, 3673 flow [2024-06-20 16:10:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-20 16:10:06,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-20 16:10:06,992 INFO L175 Difference]: Start difference. First operand has 200 places, 273 transitions, 2981 flow. Second operand 8 states and 120 transitions. [2024-06-20 16:10:06,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 289 transitions, 3673 flow [2024-06-20 16:10:07,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 289 transitions, 3427 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-06-20 16:10:07,646 INFO L231 Difference]: Finished difference. Result has 205 places, 276 transitions, 2881 flow [2024-06-20 16:10:07,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2881, PETRI_PLACES=205, PETRI_TRANSITIONS=276} [2024-06-20 16:10:07,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-20 16:10:07,648 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 276 transitions, 2881 flow [2024-06-20 16:10:07,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:07,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:07,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:07,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:10:07,649 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)] === [2024-06-20 16:10:07,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:07,650 INFO L85 PathProgramCache]: Analyzing trace with hash 599201556, now seen corresponding path program 4 times [2024-06-20 16:10:07,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:07,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190950212] [2024-06-20 16:10:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:07,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:08,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:08,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190950212] [2024-06-20 16:10:08,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190950212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:08,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:08,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:08,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568787553] [2024-06-20 16:10:08,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:08,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:08,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:08,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:08,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:08,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 276 transitions, 2881 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:08,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:08,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:08,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:09,735 INFO L124 PetriNetUnfolderBase]: 2614/4097 cut-off events. [2024-06-20 16:10:09,735 INFO L125 PetriNetUnfolderBase]: For 357643/357645 co-relation queries the response was YES. [2024-06-20 16:10:09,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33537 conditions, 4097 events. 2614/4097 cut-off events. For 357643/357645 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22500 event pairs, 705 based on Foata normal form. 1/4097 useless extension candidates. Maximal degree in co-relation 33438. Up to 3958 conditions per place. [2024-06-20 16:10:09,776 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 17 changer transitions 0/287 dead transitions. [2024-06-20 16:10:09,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 287 transitions, 3477 flow [2024-06-20 16:10:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-20 16:10:09,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-20 16:10:09,777 INFO L175 Difference]: Start difference. First operand has 205 places, 276 transitions, 2881 flow. Second operand 8 states and 117 transitions. [2024-06-20 16:10:09,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 287 transitions, 3477 flow [2024-06-20 16:10:10,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 287 transitions, 3301 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:10,425 INFO L231 Difference]: Finished difference. Result has 207 places, 276 transitions, 2745 flow [2024-06-20 16:10:10,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2705, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2745, PETRI_PLACES=207, PETRI_TRANSITIONS=276} [2024-06-20 16:10:10,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-20 16:10:10,426 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 276 transitions, 2745 flow [2024-06-20 16:10:10,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:10,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:10,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:10,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:10:10,426 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)] === [2024-06-20 16:10:10,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash 598813343, now seen corresponding path program 6 times [2024-06-20 16:10:10,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:10,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930382665] [2024-06-20 16:10:10,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:10,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:11,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:11,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930382665] [2024-06-20 16:10:11,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930382665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:11,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:11,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:11,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927725820] [2024-06-20 16:10:11,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:11,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:11,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:11,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:11,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 276 transitions, 2745 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:11,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:11,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:11,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:12,331 INFO L124 PetriNetUnfolderBase]: 2618/4102 cut-off events. [2024-06-20 16:10:12,332 INFO L125 PetriNetUnfolderBase]: For 366607/366617 co-relation queries the response was YES. [2024-06-20 16:10:12,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33547 conditions, 4102 events. 2618/4102 cut-off events. For 366607/366617 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22452 event pairs, 684 based on Foata normal form. 7/4107 useless extension candidates. Maximal degree in co-relation 33447. Up to 3721 conditions per place. [2024-06-20 16:10:12,374 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 70 changer transitions 0/295 dead transitions. [2024-06-20 16:10:12,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 295 transitions, 3647 flow [2024-06-20 16:10:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:10:12,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 16:10:12,375 INFO L175 Difference]: Start difference. First operand has 207 places, 276 transitions, 2745 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:10:12,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 295 transitions, 3647 flow [2024-06-20 16:10:13,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 295 transitions, 3603 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:13,057 INFO L231 Difference]: Finished difference. Result has 209 places, 282 transitions, 3024 flow [2024-06-20 16:10:13,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3024, PETRI_PLACES=209, PETRI_TRANSITIONS=282} [2024-06-20 16:10:13,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-20 16:10:13,058 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 282 transitions, 3024 flow [2024-06-20 16:10:13,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:13,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:13,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:13,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:10:13,058 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)] === [2024-06-20 16:10:13,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:13,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1854898522, now seen corresponding path program 1 times [2024-06-20 16:10:13,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:13,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992406251] [2024-06-20 16:10:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:13,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:13,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:13,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992406251] [2024-06-20 16:10:13,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992406251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:13,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:13,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:13,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341290196] [2024-06-20 16:10:13,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:13,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:13,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:14,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:14,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 282 transitions, 3024 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:14,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:14,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:14,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:14,837 INFO L124 PetriNetUnfolderBase]: 2531/4016 cut-off events. [2024-06-20 16:10:14,837 INFO L125 PetriNetUnfolderBase]: For 377583/377585 co-relation queries the response was YES. [2024-06-20 16:10:14,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33591 conditions, 4016 events. 2531/4016 cut-off events. For 377583/377585 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22382 event pairs, 669 based on Foata normal form. 1/4016 useless extension candidates. Maximal degree in co-relation 33489. Up to 3721 conditions per place. [2024-06-20 16:10:14,880 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 261 selfloop transitions, 19 changer transitions 0/299 dead transitions. [2024-06-20 16:10:14,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 299 transitions, 3636 flow [2024-06-20 16:10:14,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:10:14,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:10:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:10:14,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:10:14,896 INFO L175 Difference]: Start difference. First operand has 209 places, 282 transitions, 3024 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:10:14,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 299 transitions, 3636 flow [2024-06-20 16:10:15,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 299 transitions, 3434 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:15,666 INFO L231 Difference]: Finished difference. Result has 212 places, 282 transitions, 2870 flow [2024-06-20 16:10:15,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2870, PETRI_PLACES=212, PETRI_TRANSITIONS=282} [2024-06-20 16:10:15,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-20 16:10:15,667 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 282 transitions, 2870 flow [2024-06-20 16:10:15,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:15,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:15,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:15,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:10:15,667 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:15,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash -595301073, now seen corresponding path program 1 times [2024-06-20 16:10:15,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:15,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996763768] [2024-06-20 16:10:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:15,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:16,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:16,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996763768] [2024-06-20 16:10:16,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996763768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:16,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:16,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:16,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794861294] [2024-06-20 16:10:16,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:16,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:16,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:16,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:16,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:16,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 282 transitions, 2870 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:16,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:16,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:16,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:17,487 INFO L124 PetriNetUnfolderBase]: 2546/4038 cut-off events. [2024-06-20 16:10:17,487 INFO L125 PetriNetUnfolderBase]: For 394844/394846 co-relation queries the response was YES. [2024-06-20 16:10:17,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33777 conditions, 4038 events. 2546/4038 cut-off events. For 394844/394846 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22498 event pairs, 688 based on Foata normal form. 4/4041 useless extension candidates. Maximal degree in co-relation 33673. Up to 3735 conditions per place. [2024-06-20 16:10:17,535 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 20 changer transitions 0/304 dead transitions. [2024-06-20 16:10:17,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 304 transitions, 3546 flow [2024-06-20 16:10:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:10:17,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:10:17,553 INFO L175 Difference]: Start difference. First operand has 212 places, 282 transitions, 2870 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:10:17,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 304 transitions, 3546 flow [2024-06-20 16:10:18,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 304 transitions, 3498 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:18,349 INFO L231 Difference]: Finished difference. Result has 214 places, 285 transitions, 2922 flow [2024-06-20 16:10:18,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2922, PETRI_PLACES=214, PETRI_TRANSITIONS=285} [2024-06-20 16:10:18,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-20 16:10:18,350 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 285 transitions, 2922 flow [2024-06-20 16:10:18,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:18,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:18,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:18,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:10:18,350 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)] === [2024-06-20 16:10:18,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash 356470639, now seen corresponding path program 2 times [2024-06-20 16:10:18,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:18,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091768145] [2024-06-20 16:10:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:18,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:19,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:19,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091768145] [2024-06-20 16:10:19,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091768145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:19,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:19,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:19,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458191710] [2024-06-20 16:10:19,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:19,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:19,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:19,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:19,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:19,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:19,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 285 transitions, 2922 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:19,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:19,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:19,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:20,229 INFO L124 PetriNetUnfolderBase]: 2589/4101 cut-off events. [2024-06-20 16:10:20,229 INFO L125 PetriNetUnfolderBase]: For 415303/415305 co-relation queries the response was YES. [2024-06-20 16:10:20,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34877 conditions, 4101 events. 2589/4101 cut-off events. For 415303/415305 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22904 event pairs, 690 based on Foata normal form. 6/4106 useless extension candidates. Maximal degree in co-relation 34772. Up to 3787 conditions per place. [2024-06-20 16:10:20,275 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 25 changer transitions 0/309 dead transitions. [2024-06-20 16:10:20,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 309 transitions, 3794 flow [2024-06-20 16:10:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:10:20,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:10:20,276 INFO L175 Difference]: Start difference. First operand has 214 places, 285 transitions, 2922 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:10:20,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 309 transitions, 3794 flow [2024-06-20 16:10:21,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 309 transitions, 3716 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:21,237 INFO L231 Difference]: Finished difference. Result has 216 places, 292 transitions, 3019 flow [2024-06-20 16:10:21,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3019, PETRI_PLACES=216, PETRI_TRANSITIONS=292} [2024-06-20 16:10:21,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-20 16:10:21,238 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 292 transitions, 3019 flow [2024-06-20 16:10:21,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:21,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:21,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:21,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:10:21,239 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)] === [2024-06-20 16:10:21,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash -591582003, now seen corresponding path program 3 times [2024-06-20 16:10:21,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:21,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529328926] [2024-06-20 16:10:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:21,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:22,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:22,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529328926] [2024-06-20 16:10:22,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529328926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:22,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:22,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:22,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272497024] [2024-06-20 16:10:22,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:22,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:22,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:22,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:22,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:22,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:22,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 292 transitions, 3019 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:22,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:22,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:22,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:23,160 INFO L124 PetriNetUnfolderBase]: 2599/4117 cut-off events. [2024-06-20 16:10:23,160 INFO L125 PetriNetUnfolderBase]: For 422813/422815 co-relation queries the response was YES. [2024-06-20 16:10:23,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35558 conditions, 4117 events. 2599/4117 cut-off events. For 422813/422815 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23052 event pairs, 692 based on Foata normal form. 4/4118 useless extension candidates. Maximal degree in co-relation 35452. Up to 3798 conditions per place. [2024-06-20 16:10:23,217 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 27 changer transitions 0/312 dead transitions. [2024-06-20 16:10:23,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 312 transitions, 3717 flow [2024-06-20 16:10:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:10:23,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:10:23,219 INFO L175 Difference]: Start difference. First operand has 216 places, 292 transitions, 3019 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:10:23,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 312 transitions, 3717 flow [2024-06-20 16:10:24,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 312 transitions, 3645 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:24,078 INFO L231 Difference]: Finished difference. Result has 220 places, 295 transitions, 3073 flow [2024-06-20 16:10:24,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3073, PETRI_PLACES=220, PETRI_TRANSITIONS=295} [2024-06-20 16:10:24,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-20 16:10:24,079 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 295 transitions, 3073 flow [2024-06-20 16:10:24,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:24,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:24,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:24,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:10:24,079 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:24,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:24,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1161387565, now seen corresponding path program 4 times [2024-06-20 16:10:24,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:24,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974644856] [2024-06-20 16:10:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:24,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:25,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:25,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974644856] [2024-06-20 16:10:25,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974644856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:25,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:25,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:25,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117206970] [2024-06-20 16:10:25,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:25,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:25,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:25,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:25,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:25,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 295 transitions, 3073 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:25,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:25,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:25,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:25,929 INFO L124 PetriNetUnfolderBase]: 2614/4140 cut-off events. [2024-06-20 16:10:25,929 INFO L125 PetriNetUnfolderBase]: For 434716/434720 co-relation queries the response was YES. [2024-06-20 16:10:25,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36042 conditions, 4140 events. 2614/4140 cut-off events. For 434716/434720 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23126 event pairs, 703 based on Foata normal form. 4/4139 useless extension candidates. Maximal degree in co-relation 35934. Up to 3805 conditions per place. [2024-06-20 16:10:25,978 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 259 selfloop transitions, 34 changer transitions 0/312 dead transitions. [2024-06-20 16:10:25,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 312 transitions, 3767 flow [2024-06-20 16:10:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:10:25,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:10:25,980 INFO L175 Difference]: Start difference. First operand has 220 places, 295 transitions, 3073 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:10:25,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 312 transitions, 3767 flow [2024-06-20 16:10:26,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 312 transitions, 3663 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:26,726 INFO L231 Difference]: Finished difference. Result has 222 places, 298 transitions, 3115 flow [2024-06-20 16:10:26,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3115, PETRI_PLACES=222, PETRI_TRANSITIONS=298} [2024-06-20 16:10:26,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-20 16:10:26,727 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 298 transitions, 3115 flow [2024-06-20 16:10:26,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:26,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:26,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:26,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:10:26,727 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:26,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:26,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1161381985, now seen corresponding path program 5 times [2024-06-20 16:10:26,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:26,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671164035] [2024-06-20 16:10:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:26,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:27,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:27,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671164035] [2024-06-20 16:10:27,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671164035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:27,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:27,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:27,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996084866] [2024-06-20 16:10:27,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:27,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:27,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:27,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:27,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:27,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:27,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 298 transitions, 3115 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:27,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:27,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:27,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:28,610 INFO L124 PetriNetUnfolderBase]: 2658/4206 cut-off events. [2024-06-20 16:10:28,610 INFO L125 PetriNetUnfolderBase]: For 457406/457412 co-relation queries the response was YES. [2024-06-20 16:10:28,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37194 conditions, 4206 events. 2658/4206 cut-off events. For 457406/457412 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23568 event pairs, 680 based on Foata normal form. 10/4215 useless extension candidates. Maximal degree in co-relation 37085. Up to 3877 conditions per place. [2024-06-20 16:10:28,658 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 28 changer transitions 0/320 dead transitions. [2024-06-20 16:10:28,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 320 transitions, 4057 flow [2024-06-20 16:10:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:10:28,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:10:28,659 INFO L175 Difference]: Start difference. First operand has 222 places, 298 transitions, 3115 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:10:28,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 320 transitions, 4057 flow [2024-06-20 16:10:29,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 320 transitions, 3933 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:29,496 INFO L231 Difference]: Finished difference. Result has 224 places, 305 transitions, 3205 flow [2024-06-20 16:10:29,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3205, PETRI_PLACES=224, PETRI_TRANSITIONS=305} [2024-06-20 16:10:29,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-20 16:10:29,496 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 305 transitions, 3205 flow [2024-06-20 16:10:29,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:29,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:29,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:29,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:10:29,497 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)] === [2024-06-20 16:10:29,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:29,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1154030335, now seen corresponding path program 6 times [2024-06-20 16:10:29,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:29,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329082120] [2024-06-20 16:10:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:29,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:30,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:30,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329082120] [2024-06-20 16:10:30,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329082120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:30,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:30,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:30,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110184344] [2024-06-20 16:10:30,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:30,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:30,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:30,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:30,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 305 transitions, 3205 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:30,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:30,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:30,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:31,321 INFO L124 PetriNetUnfolderBase]: 2686/4246 cut-off events. [2024-06-20 16:10:31,321 INFO L125 PetriNetUnfolderBase]: For 470959/470965 co-relation queries the response was YES. [2024-06-20 16:10:31,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38099 conditions, 4246 events. 2686/4246 cut-off events. For 470959/470965 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 23756 event pairs, 682 based on Foata normal form. 10/4255 useless extension candidates. Maximal degree in co-relation 37989. Up to 3835 conditions per place. [2024-06-20 16:10:31,368 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 53 changer transitions 0/330 dead transitions. [2024-06-20 16:10:31,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 330 transitions, 4353 flow [2024-06-20 16:10:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:10:31,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 16:10:31,370 INFO L175 Difference]: Start difference. First operand has 224 places, 305 transitions, 3205 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:10:31,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 330 transitions, 4353 flow [2024-06-20 16:10:32,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 330 transitions, 4249 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:32,189 INFO L231 Difference]: Finished difference. Result has 228 places, 312 transitions, 3379 flow [2024-06-20 16:10:32,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3379, PETRI_PLACES=228, PETRI_TRANSITIONS=312} [2024-06-20 16:10:32,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-20 16:10:32,190 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 312 transitions, 3379 flow [2024-06-20 16:10:32,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:32,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:32,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:32,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:10:32,190 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)] === [2024-06-20 16:10:32,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1153753288, now seen corresponding path program 1 times [2024-06-20 16:10:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:32,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949738731] [2024-06-20 16:10:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:32,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:33,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949738731] [2024-06-20 16:10:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949738731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:33,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:33,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:33,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156994491] [2024-06-20 16:10:33,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:33,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:33,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:33,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:33,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 312 transitions, 3379 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:33,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:33,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:33,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:34,521 INFO L124 PetriNetUnfolderBase]: 2796/4353 cut-off events. [2024-06-20 16:10:34,521 INFO L125 PetriNetUnfolderBase]: For 470645/470647 co-relation queries the response was YES. [2024-06-20 16:10:34,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38980 conditions, 4353 events. 2796/4353 cut-off events. For 470645/470647 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 23874 event pairs, 721 based on Foata normal form. 2/4354 useless extension candidates. Maximal degree in co-relation 38868. Up to 4207 conditions per place. [2024-06-20 16:10:34,569 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 304 selfloop transitions, 18 changer transitions 0/326 dead transitions. [2024-06-20 16:10:34,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 326 transitions, 4141 flow [2024-06-20 16:10:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-20 16:10:34,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-20 16:10:34,570 INFO L175 Difference]: Start difference. First operand has 228 places, 312 transitions, 3379 flow. Second operand 8 states and 118 transitions. [2024-06-20 16:10:34,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 326 transitions, 4141 flow [2024-06-20 16:10:35,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 326 transitions, 3943 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:35,525 INFO L231 Difference]: Finished difference. Result has 230 places, 314 transitions, 3312 flow [2024-06-20 16:10:35,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3185, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3312, PETRI_PLACES=230, PETRI_TRANSITIONS=314} [2024-06-20 16:10:35,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-20 16:10:35,526 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 314 transitions, 3312 flow [2024-06-20 16:10:35,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:35,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:35,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:35,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:10:35,526 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)] === [2024-06-20 16:10:35,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:35,527 INFO L85 PathProgramCache]: Analyzing trace with hash 411464044, now seen corresponding path program 1 times [2024-06-20 16:10:35,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:35,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57805662] [2024-06-20 16:10:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:36,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:36,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57805662] [2024-06-20 16:10:36,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57805662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:36,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:36,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:36,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766151113] [2024-06-20 16:10:36,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:36,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:36,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:36,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:36,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:36,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:36,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 314 transitions, 3312 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:36,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:36,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:36,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:37,429 INFO L124 PetriNetUnfolderBase]: 2812/4380 cut-off events. [2024-06-20 16:10:37,429 INFO L125 PetriNetUnfolderBase]: For 482067/482077 co-relation queries the response was YES. [2024-06-20 16:10:37,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38462 conditions, 4380 events. 2812/4380 cut-off events. For 482067/482077 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 24030 event pairs, 515 based on Foata normal form. 14/4393 useless extension candidates. Maximal degree in co-relation 38350. Up to 4039 conditions per place. [2024-06-20 16:10:37,482 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 37 changer transitions 0/346 dead transitions. [2024-06-20 16:10:37,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 346 transitions, 4190 flow [2024-06-20 16:10:37,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:10:37,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 16:10:37,484 INFO L175 Difference]: Start difference. First operand has 230 places, 314 transitions, 3312 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:10:37,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 346 transitions, 4190 flow [2024-06-20 16:10:38,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 346 transitions, 4079 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:38,428 INFO L231 Difference]: Finished difference. Result has 232 places, 317 transitions, 3387 flow [2024-06-20 16:10:38,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3201, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3387, PETRI_PLACES=232, PETRI_TRANSITIONS=317} [2024-06-20 16:10:38,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-20 16:10:38,436 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 317 transitions, 3387 flow [2024-06-20 16:10:38,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:38,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:38,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:38,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:10:38,436 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)] === [2024-06-20 16:10:38,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash -456462042, now seen corresponding path program 2 times [2024-06-20 16:10:38,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:38,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347075706] [2024-06-20 16:10:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:39,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:39,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347075706] [2024-06-20 16:10:39,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347075706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:39,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:39,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:39,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072834084] [2024-06-20 16:10:39,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:39,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:39,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:39,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:39,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:39,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 317 transitions, 3387 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:39,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:39,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:39,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:40,277 INFO L124 PetriNetUnfolderBase]: 2828/4404 cut-off events. [2024-06-20 16:10:40,277 INFO L125 PetriNetUnfolderBase]: For 495671/495681 co-relation queries the response was YES. [2024-06-20 16:10:40,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39151 conditions, 4404 events. 2828/4404 cut-off events. For 495671/495681 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24229 event pairs, 669 based on Foata normal form. 14/4417 useless extension candidates. Maximal degree in co-relation 39038. Up to 4116 conditions per place. [2024-06-20 16:10:40,336 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 303 selfloop transitions, 38 changer transitions 0/345 dead transitions. [2024-06-20 16:10:40,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 345 transitions, 4257 flow [2024-06-20 16:10:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:10:40,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 16:10:40,337 INFO L175 Difference]: Start difference. First operand has 232 places, 317 transitions, 3387 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:10:40,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 345 transitions, 4257 flow [2024-06-20 16:10:41,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 345 transitions, 4093 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:41,288 INFO L231 Difference]: Finished difference. Result has 234 places, 320 transitions, 3417 flow [2024-06-20 16:10:41,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3417, PETRI_PLACES=234, PETRI_TRANSITIONS=320} [2024-06-20 16:10:41,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-20 16:10:41,289 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 320 transitions, 3417 flow [2024-06-20 16:10:41,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:41,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:41,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:41,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:10:41,292 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:41,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:41,292 INFO L85 PathProgramCache]: Analyzing trace with hash 411771626, now seen corresponding path program 1 times [2024-06-20 16:10:41,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:41,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272192844] [2024-06-20 16:10:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:41,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:42,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:42,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272192844] [2024-06-20 16:10:42,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272192844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:42,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:42,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276820294] [2024-06-20 16:10:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:42,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:42,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 320 transitions, 3417 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:42,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:42,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:42,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:43,423 INFO L124 PetriNetUnfolderBase]: 2838/4418 cut-off events. [2024-06-20 16:10:43,424 INFO L125 PetriNetUnfolderBase]: For 504016/504026 co-relation queries the response was YES. [2024-06-20 16:10:43,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39473 conditions, 4418 events. 2838/4418 cut-off events. For 504016/504026 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24318 event pairs, 668 based on Foata normal form. 12/4429 useless extension candidates. Maximal degree in co-relation 39359. Up to 4130 conditions per place. [2024-06-20 16:10:43,477 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 302 selfloop transitions, 43 changer transitions 0/349 dead transitions. [2024-06-20 16:10:43,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 349 transitions, 4315 flow [2024-06-20 16:10:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:10:43,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:10:43,478 INFO L175 Difference]: Start difference. First operand has 234 places, 320 transitions, 3417 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:10:43,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 349 transitions, 4315 flow [2024-06-20 16:10:44,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 349 transitions, 4143 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:44,651 INFO L231 Difference]: Finished difference. Result has 237 places, 324 transitions, 3472 flow [2024-06-20 16:10:44,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3472, PETRI_PLACES=237, PETRI_TRANSITIONS=324} [2024-06-20 16:10:44,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-20 16:10:44,653 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 324 transitions, 3472 flow [2024-06-20 16:10:44,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:44,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:44,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:44,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:10:44,653 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:44,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:44,653 INFO L85 PathProgramCache]: Analyzing trace with hash -338371200, now seen corresponding path program 1 times [2024-06-20 16:10:44,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:44,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611381813] [2024-06-20 16:10:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:44,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:45,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:45,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611381813] [2024-06-20 16:10:45,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611381813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:45,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:45,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:45,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022690233] [2024-06-20 16:10:45,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:45,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:45,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:45,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:45,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:45,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:45,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 324 transitions, 3472 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:45,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:45,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:45,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:46,393 INFO L124 PetriNetUnfolderBase]: 2858/4438 cut-off events. [2024-06-20 16:10:46,393 INFO L125 PetriNetUnfolderBase]: For 522451/522455 co-relation queries the response was YES. [2024-06-20 16:10:46,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40083 conditions, 4438 events. 2858/4438 cut-off events. For 522451/522455 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24383 event pairs, 621 based on Foata normal form. 4/4441 useless extension candidates. Maximal degree in co-relation 39968. Up to 3852 conditions per place. [2024-06-20 16:10:46,445 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 276 selfloop transitions, 83 changer transitions 0/363 dead transitions. [2024-06-20 16:10:46,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 363 transitions, 4451 flow [2024-06-20 16:10:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:10:46,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 16:10:46,446 INFO L175 Difference]: Start difference. First operand has 237 places, 324 transitions, 3472 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:10:46,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 363 transitions, 4451 flow [2024-06-20 16:10:47,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 363 transitions, 4252 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:47,614 INFO L231 Difference]: Finished difference. Result has 239 places, 337 transitions, 3644 flow [2024-06-20 16:10:47,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3644, PETRI_PLACES=239, PETRI_TRANSITIONS=337} [2024-06-20 16:10:47,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-20 16:10:47,615 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 337 transitions, 3644 flow [2024-06-20 16:10:47,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:47,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:47,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:47,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:10:47,615 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:47,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:47,616 INFO L85 PathProgramCache]: Analyzing trace with hash 61615808, now seen corresponding path program 1 times [2024-06-20 16:10:47,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:47,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996110780] [2024-06-20 16:10:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:48,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:48,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996110780] [2024-06-20 16:10:48,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996110780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:48,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:48,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:48,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594846565] [2024-06-20 16:10:48,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:48,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:48,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:48,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:48,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:48,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:48,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 337 transitions, 3644 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:48,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:48,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:48,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:49,580 INFO L124 PetriNetUnfolderBase]: 2868/4442 cut-off events. [2024-06-20 16:10:49,580 INFO L125 PetriNetUnfolderBase]: For 532608/532614 co-relation queries the response was YES. [2024-06-20 16:10:49,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41280 conditions, 4442 events. 2868/4442 cut-off events. For 532608/532614 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24294 event pairs, 638 based on Foata normal form. 6/4447 useless extension candidates. Maximal degree in co-relation 41163. Up to 4174 conditions per place. [2024-06-20 16:10:49,628 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 39 changer transitions 0/362 dead transitions. [2024-06-20 16:10:49,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 362 transitions, 4502 flow [2024-06-20 16:10:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:10:49,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:10:49,629 INFO L175 Difference]: Start difference. First operand has 239 places, 337 transitions, 3644 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:10:49,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 362 transitions, 4502 flow [2024-06-20 16:10:50,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 362 transitions, 4284 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:50,582 INFO L231 Difference]: Finished difference. Result has 243 places, 341 transitions, 3593 flow [2024-06-20 16:10:50,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3426, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3593, PETRI_PLACES=243, PETRI_TRANSITIONS=341} [2024-06-20 16:10:50,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-20 16:10:50,583 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 341 transitions, 3593 flow [2024-06-20 16:10:50,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:50,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:50,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:50,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:10:50,584 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:50,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash 61615622, now seen corresponding path program 2 times [2024-06-20 16:10:50,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:50,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343230817] [2024-06-20 16:10:50,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:50,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:51,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:51,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343230817] [2024-06-20 16:10:51,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343230817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:51,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:51,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:51,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844559537] [2024-06-20 16:10:51,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:51,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:51,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:51,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:51,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:51,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:51,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 341 transitions, 3593 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:51,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:51,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:51,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:52,446 INFO L124 PetriNetUnfolderBase]: 2904/4495 cut-off events. [2024-06-20 16:10:52,446 INFO L125 PetriNetUnfolderBase]: For 560109/560113 co-relation queries the response was YES. [2024-06-20 16:10:52,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41788 conditions, 4495 events. 2904/4495 cut-off events. For 560109/560113 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24628 event pairs, 636 based on Foata normal form. 4/4498 useless extension candidates. Maximal degree in co-relation 41670. Up to 3874 conditions per place. [2024-06-20 16:10:52,496 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 92 changer transitions 0/373 dead transitions. [2024-06-20 16:10:52,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 373 transitions, 4789 flow [2024-06-20 16:10:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:10:52,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:10:52,498 INFO L175 Difference]: Start difference. First operand has 243 places, 341 transitions, 3593 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:10:52,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 373 transitions, 4789 flow [2024-06-20 16:10:53,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 373 transitions, 4672 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:53,697 INFO L231 Difference]: Finished difference. Result has 245 places, 349 transitions, 3895 flow [2024-06-20 16:10:53,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3476, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3895, PETRI_PLACES=245, PETRI_TRANSITIONS=349} [2024-06-20 16:10:53,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-20 16:10:53,697 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 349 transitions, 3895 flow [2024-06-20 16:10:53,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:53,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:53,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:53,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:10:53,698 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:53,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash 238984478, now seen corresponding path program 2 times [2024-06-20 16:10:53,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:53,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253573963] [2024-06-20 16:10:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:53,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:54,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:54,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253573963] [2024-06-20 16:10:54,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253573963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:54,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:54,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:54,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938373446] [2024-06-20 16:10:54,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:54,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:54,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 349 transitions, 3895 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:54,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:54,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:54,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:55,779 INFO L124 PetriNetUnfolderBase]: 2914/4513 cut-off events. [2024-06-20 16:10:55,779 INFO L125 PetriNetUnfolderBase]: For 573064/573070 co-relation queries the response was YES. [2024-06-20 16:10:55,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42813 conditions, 4513 events. 2914/4513 cut-off events. For 573064/573070 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24699 event pairs, 631 based on Foata normal form. 6/4518 useless extension candidates. Maximal degree in co-relation 42694. Up to 4154 conditions per place. [2024-06-20 16:10:55,834 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 303 selfloop transitions, 64 changer transitions 0/371 dead transitions. [2024-06-20 16:10:55,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 371 transitions, 4923 flow [2024-06-20 16:10:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:10:55,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:10:55,836 INFO L175 Difference]: Start difference. First operand has 245 places, 349 transitions, 3895 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:10:55,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 371 transitions, 4923 flow [2024-06-20 16:10:56,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 371 transitions, 4704 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:56,942 INFO L231 Difference]: Finished difference. Result has 249 places, 353 transitions, 3898 flow [2024-06-20 16:10:56,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3898, PETRI_PLACES=249, PETRI_TRANSITIONS=353} [2024-06-20 16:10:56,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-20 16:10:56,942 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 353 transitions, 3898 flow [2024-06-20 16:10:56,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:56,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:56,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:56,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:10:56,943 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:56,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:56,943 INFO L85 PathProgramCache]: Analyzing trace with hash 238747142, now seen corresponding path program 3 times [2024-06-20 16:10:56,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:56,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812913774] [2024-06-20 16:10:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:57,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:57,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812913774] [2024-06-20 16:10:57,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812913774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:57,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:57,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:57,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874811710] [2024-06-20 16:10:57,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:57,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:57,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:57,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:57,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:57,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:10:57,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 353 transitions, 3898 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:57,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:57,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:10:57,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:58,718 INFO L124 PetriNetUnfolderBase]: 2966/4599 cut-off events. [2024-06-20 16:10:58,719 INFO L125 PetriNetUnfolderBase]: For 604719/604723 co-relation queries the response was YES. [2024-06-20 16:10:58,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44058 conditions, 4599 events. 2966/4599 cut-off events. For 604719/604723 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25280 event pairs, 663 based on Foata normal form. 4/4602 useless extension candidates. Maximal degree in co-relation 43937. Up to 3829 conditions per place. [2024-06-20 16:10:58,780 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 97 changer transitions 0/381 dead transitions. [2024-06-20 16:10:58,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 381 transitions, 5114 flow [2024-06-20 16:10:58,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:10:58,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 16:10:58,782 INFO L175 Difference]: Start difference. First operand has 249 places, 353 transitions, 3898 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:10:58,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 381 transitions, 5114 flow [2024-06-20 16:11:00,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 381 transitions, 4969 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 16:11:00,278 INFO L231 Difference]: Finished difference. Result has 252 places, 360 transitions, 4158 flow [2024-06-20 16:11:00,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3753, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4158, PETRI_PLACES=252, PETRI_TRANSITIONS=360} [2024-06-20 16:11:00,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-20 16:11:00,279 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 360 transitions, 4158 flow [2024-06-20 16:11:00,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:00,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:00,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:00,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:11:00,280 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:00,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash -433591592, now seen corresponding path program 3 times [2024-06-20 16:11:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:00,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252596382] [2024-06-20 16:11:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:00,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:01,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:01,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252596382] [2024-06-20 16:11:01,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252596382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:01,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:01,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:01,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114049996] [2024-06-20 16:11:01,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:01,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:01,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:01,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:01,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 360 transitions, 4158 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:01,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:01,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:01,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:02,198 INFO L124 PetriNetUnfolderBase]: 2968/4597 cut-off events. [2024-06-20 16:11:02,198 INFO L125 PetriNetUnfolderBase]: For 613587/613593 co-relation queries the response was YES. [2024-06-20 16:11:02,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44847 conditions, 4597 events. 2968/4597 cut-off events. For 613587/613593 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25297 event pairs, 610 based on Foata normal form. 6/4602 useless extension candidates. Maximal degree in co-relation 44725. Up to 4275 conditions per place. [2024-06-20 16:11:02,255 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 328 selfloop transitions, 48 changer transitions 0/380 dead transitions. [2024-06-20 16:11:02,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 380 transitions, 5032 flow [2024-06-20 16:11:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:11:02,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-20 16:11:02,257 INFO L175 Difference]: Start difference. First operand has 252 places, 360 transitions, 4158 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:11:02,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 380 transitions, 5032 flow [2024-06-20 16:11:03,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 380 transitions, 4832 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:03,575 INFO L231 Difference]: Finished difference. Result has 256 places, 363 transitions, 4137 flow [2024-06-20 16:11:03,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4137, PETRI_PLACES=256, PETRI_TRANSITIONS=363} [2024-06-20 16:11:03,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-20 16:11:03,575 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 363 transitions, 4137 flow [2024-06-20 16:11:03,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:03,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:03,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:03,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:11:03,576 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:03,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash -433714910, now seen corresponding path program 3 times [2024-06-20 16:11:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:03,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754182939] [2024-06-20 16:11:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:03,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:04,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:04,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754182939] [2024-06-20 16:11:04,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754182939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:04,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:04,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:04,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575786985] [2024-06-20 16:11:04,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:04,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:04,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:04,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:04,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:04,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:04,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 363 transitions, 4137 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:04,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:04,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:04,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:05,349 INFO L124 PetriNetUnfolderBase]: 2984/4621 cut-off events. [2024-06-20 16:11:05,349 INFO L125 PetriNetUnfolderBase]: For 634252/634258 co-relation queries the response was YES. [2024-06-20 16:11:05,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45235 conditions, 4621 events. 2984/4621 cut-off events. For 634252/634258 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25420 event pairs, 616 based on Foata normal form. 8/4628 useless extension candidates. Maximal degree in co-relation 45111. Up to 4293 conditions per place. [2024-06-20 16:11:05,408 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 332 selfloop transitions, 48 changer transitions 0/384 dead transitions. [2024-06-20 16:11:05,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 384 transitions, 5073 flow [2024-06-20 16:11:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:11:05,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-20 16:11:05,410 INFO L175 Difference]: Start difference. First operand has 256 places, 363 transitions, 4137 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:11:05,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 384 transitions, 5073 flow [2024-06-20 16:11:06,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 384 transitions, 4928 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:06,430 INFO L231 Difference]: Finished difference. Result has 258 places, 366 transitions, 4222 flow [2024-06-20 16:11:06,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4222, PETRI_PLACES=258, PETRI_TRANSITIONS=366} [2024-06-20 16:11:06,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-20 16:11:06,430 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 366 transitions, 4222 flow [2024-06-20 16:11:06,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:06,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:06,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:06,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:11:06,432 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:06,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash 238634922, now seen corresponding path program 2 times [2024-06-20 16:11:06,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:06,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351900327] [2024-06-20 16:11:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:06,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:07,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:07,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351900327] [2024-06-20 16:11:07,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351900327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:07,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:07,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:07,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131133074] [2024-06-20 16:11:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:07,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:07,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:07,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:07,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:07,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 366 transitions, 4222 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:07,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:07,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:07,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:08,710 INFO L124 PetriNetUnfolderBase]: 3004/4649 cut-off events. [2024-06-20 16:11:08,710 INFO L125 PetriNetUnfolderBase]: For 650423/650429 co-relation queries the response was YES. [2024-06-20 16:11:08,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45934 conditions, 4649 events. 3004/4649 cut-off events. For 650423/650429 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25597 event pairs, 613 based on Foata normal form. 8/4656 useless extension candidates. Maximal degree in co-relation 45809. Up to 4315 conditions per place. [2024-06-20 16:11:08,772 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 332 selfloop transitions, 53 changer transitions 0/389 dead transitions. [2024-06-20 16:11:08,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 389 transitions, 5198 flow [2024-06-20 16:11:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:08,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 16:11:08,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:11:08,773 INFO L175 Difference]: Start difference. First operand has 258 places, 366 transitions, 4222 flow. Second operand 9 states and 144 transitions. [2024-06-20 16:11:08,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 389 transitions, 5198 flow [2024-06-20 16:11:09,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 389 transitions, 4990 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:09,947 INFO L231 Difference]: Finished difference. Result has 261 places, 370 transitions, 4263 flow [2024-06-20 16:11:09,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4263, PETRI_PLACES=261, PETRI_TRANSITIONS=370} [2024-06-20 16:11:09,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-20 16:11:09,948 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 370 transitions, 4263 flow [2024-06-20 16:11:09,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:09,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:09,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:09,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:11:09,949 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:09,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash 238980882, now seen corresponding path program 3 times [2024-06-20 16:11:09,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:09,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930152158] [2024-06-20 16:11:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:09,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:11,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:11,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930152158] [2024-06-20 16:11:11,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930152158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:11,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:11,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:11,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636135540] [2024-06-20 16:11:11,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:11,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:11,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:11,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:11,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:11,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:11,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 370 transitions, 4263 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:11,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:11,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:11,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:12,223 INFO L124 PetriNetUnfolderBase]: 3108/4808 cut-off events. [2024-06-20 16:11:12,224 INFO L125 PetriNetUnfolderBase]: For 708014/708020 co-relation queries the response was YES. [2024-06-20 16:11:12,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49132 conditions, 4808 events. 3108/4808 cut-off events. For 708014/708020 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26658 event pairs, 605 based on Foata normal form. 8/4815 useless extension candidates. Maximal degree in co-relation 49006. Up to 4300 conditions per place. [2024-06-20 16:11:12,287 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 324 selfloop transitions, 78 changer transitions 0/406 dead transitions. [2024-06-20 16:11:12,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 406 transitions, 5983 flow [2024-06-20 16:11:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:11:12,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-20 16:11:12,288 INFO L175 Difference]: Start difference. First operand has 261 places, 370 transitions, 4263 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:11:12,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 406 transitions, 5983 flow [2024-06-20 16:11:13,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 406 transitions, 5776 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:13,427 INFO L231 Difference]: Finished difference. Result has 265 places, 382 transitions, 4671 flow [2024-06-20 16:11:13,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4056, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4671, PETRI_PLACES=265, PETRI_TRANSITIONS=382} [2024-06-20 16:11:13,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-20 16:11:13,428 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 382 transitions, 4671 flow [2024-06-20 16:11:13,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:13,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:13,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:13,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:11:13,429 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:13,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:13,429 INFO L85 PathProgramCache]: Analyzing trace with hash 238993406, now seen corresponding path program 1 times [2024-06-20 16:11:13,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:13,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209269976] [2024-06-20 16:11:13,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:13,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:14,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:14,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209269976] [2024-06-20 16:11:14,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209269976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:14,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:14,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:14,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698367476] [2024-06-20 16:11:14,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:14,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:14,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:14,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:14,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:15,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:15,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 382 transitions, 4671 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:15,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:15,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:15,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:16,142 INFO L124 PetriNetUnfolderBase]: 3105/4807 cut-off events. [2024-06-20 16:11:16,142 INFO L125 PetriNetUnfolderBase]: For 712487/712493 co-relation queries the response was YES. [2024-06-20 16:11:16,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49778 conditions, 4807 events. 3105/4807 cut-off events. For 712487/712493 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26601 event pairs, 636 based on Foata normal form. 7/4813 useless extension candidates. Maximal degree in co-relation 49649. Up to 4626 conditions per place. [2024-06-20 16:11:16,208 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 21 changer transitions 0/403 dead transitions. [2024-06-20 16:11:16,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 403 transitions, 5650 flow [2024-06-20 16:11:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:16,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 16:11:16,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-20 16:11:16,209 INFO L175 Difference]: Start difference. First operand has 265 places, 382 transitions, 4671 flow. Second operand 8 states and 124 transitions. [2024-06-20 16:11:16,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 403 transitions, 5650 flow [2024-06-20 16:11:17,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 403 transitions, 5406 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:17,288 INFO L231 Difference]: Finished difference. Result has 269 places, 385 transitions, 4606 flow [2024-06-20 16:11:17,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4606, PETRI_PLACES=269, PETRI_TRANSITIONS=385} [2024-06-20 16:11:17,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-20 16:11:17,289 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 385 transitions, 4606 flow [2024-06-20 16:11:17,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:17,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:17,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:17,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:11:17,290 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:17,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:17,290 INFO L85 PathProgramCache]: Analyzing trace with hash 238992972, now seen corresponding path program 4 times [2024-06-20 16:11:17,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:17,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042182556] [2024-06-20 16:11:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:17,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:18,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:18,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042182556] [2024-06-20 16:11:18,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042182556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:18,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:18,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:18,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307121960] [2024-06-20 16:11:18,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:18,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:18,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:18,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:18,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 385 transitions, 4606 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:18,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:18,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:18,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:19,551 INFO L124 PetriNetUnfolderBase]: 3101/4796 cut-off events. [2024-06-20 16:11:19,552 INFO L125 PetriNetUnfolderBase]: For 716840/716846 co-relation queries the response was YES. [2024-06-20 16:11:19,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49129 conditions, 4796 events. 3101/4796 cut-off events. For 716840/716846 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26495 event pairs, 614 based on Foata normal form. 6/4801 useless extension candidates. Maximal degree in co-relation 48998. Up to 4356 conditions per place. [2024-06-20 16:11:19,623 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 337 selfloop transitions, 78 changer transitions 0/419 dead transitions. [2024-06-20 16:11:19,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 419 transitions, 6152 flow [2024-06-20 16:11:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 16:11:19,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 16:11:19,625 INFO L175 Difference]: Start difference. First operand has 269 places, 385 transitions, 4606 flow. Second operand 9 states and 147 transitions. [2024-06-20 16:11:19,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 419 transitions, 6152 flow [2024-06-20 16:11:21,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 419 transitions, 6030 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:21,116 INFO L231 Difference]: Finished difference. Result has 273 places, 397 transitions, 4980 flow [2024-06-20 16:11:21,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4980, PETRI_PLACES=273, PETRI_TRANSITIONS=397} [2024-06-20 16:11:21,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-20 16:11:21,117 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 397 transitions, 4980 flow [2024-06-20 16:11:21,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:21,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:21,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:21,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:11:21,118 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:21,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:21,118 INFO L85 PathProgramCache]: Analyzing trace with hash -915784838, now seen corresponding path program 4 times [2024-06-20 16:11:21,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:21,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737569975] [2024-06-20 16:11:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:21,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:21,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:21,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737569975] [2024-06-20 16:11:21,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737569975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:21,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:21,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:21,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479440851] [2024-06-20 16:11:21,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:21,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:21,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:21,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:21,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:21,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:21,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 397 transitions, 4980 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:21,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:21,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:21,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:23,037 INFO L124 PetriNetUnfolderBase]: 3111/4793 cut-off events. [2024-06-20 16:11:23,038 INFO L125 PetriNetUnfolderBase]: For 735260/735266 co-relation queries the response was YES. [2024-06-20 16:11:23,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49844 conditions, 4793 events. 3111/4793 cut-off events. For 735260/735266 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 26418 event pairs, 640 based on Foata normal form. 3/4786 useless extension candidates. Maximal degree in co-relation 49711. Up to 4218 conditions per place. [2024-06-20 16:11:23,107 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 337 selfloop transitions, 87 changer transitions 0/428 dead transitions. [2024-06-20 16:11:23,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 428 transitions, 6040 flow [2024-06-20 16:11:23,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:11:23,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 16:11:23,108 INFO L175 Difference]: Start difference. First operand has 273 places, 397 transitions, 4980 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:11:23,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 428 transitions, 6040 flow [2024-06-20 16:11:24,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 428 transitions, 5833 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-20 16:11:24,435 INFO L231 Difference]: Finished difference. Result has 277 places, 404 transitions, 5091 flow [2024-06-20 16:11:24,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5091, PETRI_PLACES=277, PETRI_TRANSITIONS=404} [2024-06-20 16:11:24,435 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-20 16:11:24,435 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 404 transitions, 5091 flow [2024-06-20 16:11:24,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:24,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:24,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:24,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:11:24,436 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:24,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1285904318, now seen corresponding path program 5 times [2024-06-20 16:11:24,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:24,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787635625] [2024-06-20 16:11:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:24,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:25,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:25,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787635625] [2024-06-20 16:11:25,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787635625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:25,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:25,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:25,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929231665] [2024-06-20 16:11:25,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:25,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:25,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:25,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:25,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:25,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:25,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 404 transitions, 5091 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:25,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:25,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:25,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:26,335 INFO L124 PetriNetUnfolderBase]: 3121/4807 cut-off events. [2024-06-20 16:11:26,335 INFO L125 PetriNetUnfolderBase]: For 754225/754231 co-relation queries the response was YES. [2024-06-20 16:11:26,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50799 conditions, 4807 events. 3121/4807 cut-off events. For 754225/754231 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26459 event pairs, 634 based on Foata normal form. 3/4800 useless extension candidates. Maximal degree in co-relation 50663. Up to 4232 conditions per place. [2024-06-20 16:11:26,404 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 337 selfloop transitions, 94 changer transitions 0/435 dead transitions. [2024-06-20 16:11:26,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 435 transitions, 6181 flow [2024-06-20 16:11:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:11:26,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 16:11:26,406 INFO L175 Difference]: Start difference. First operand has 277 places, 404 transitions, 5091 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:11:26,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 435 transitions, 6181 flow [2024-06-20 16:11:28,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 435 transitions, 5944 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:28,668 INFO L231 Difference]: Finished difference. Result has 282 places, 411 transitions, 5200 flow [2024-06-20 16:11:28,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4857, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5200, PETRI_PLACES=282, PETRI_TRANSITIONS=411} [2024-06-20 16:11:28,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-20 16:11:28,668 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 411 transitions, 5200 flow [2024-06-20 16:11:28,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:28,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:28,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:28,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:11:28,669 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:28,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1274476478, now seen corresponding path program 6 times [2024-06-20 16:11:28,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:28,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343482805] [2024-06-20 16:11:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:28,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:29,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:29,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343482805] [2024-06-20 16:11:29,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343482805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:29,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:29,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:29,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983609167] [2024-06-20 16:11:29,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:29,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:29,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:29,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:29,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 411 transitions, 5200 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:29,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:29,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:29,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:30,636 INFO L124 PetriNetUnfolderBase]: 3131/4821 cut-off events. [2024-06-20 16:11:30,636 INFO L125 PetriNetUnfolderBase]: For 772141/772147 co-relation queries the response was YES. [2024-06-20 16:11:30,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51517 conditions, 4821 events. 3131/4821 cut-off events. For 772141/772147 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26566 event pairs, 631 based on Foata normal form. 3/4814 useless extension candidates. Maximal degree in co-relation 51379. Up to 4204 conditions per place. [2024-06-20 16:11:30,702 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 326 selfloop transitions, 106 changer transitions 0/436 dead transitions. [2024-06-20 16:11:30,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 436 transitions, 6262 flow [2024-06-20 16:11:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:11:30,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 16:11:30,703 INFO L175 Difference]: Start difference. First operand has 282 places, 411 transitions, 5200 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:11:30,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 436 transitions, 6262 flow [2024-06-20 16:11:32,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 436 transitions, 6038 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:32,048 INFO L231 Difference]: Finished difference. Result has 286 places, 414 transitions, 5306 flow [2024-06-20 16:11:32,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4976, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5306, PETRI_PLACES=286, PETRI_TRANSITIONS=414} [2024-06-20 16:11:32,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-20 16:11:32,049 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 414 transitions, 5306 flow [2024-06-20 16:11:32,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:32,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:32,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:32,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:11:32,049 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:32,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:32,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1513685498, now seen corresponding path program 7 times [2024-06-20 16:11:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:32,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729226441] [2024-06-20 16:11:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:32,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:32,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:32,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729226441] [2024-06-20 16:11:32,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729226441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:32,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:32,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:32,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703942435] [2024-06-20 16:11:32,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:32,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:32,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:32,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:32,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:32,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 414 transitions, 5306 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:32,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:32,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:32,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:33,987 INFO L124 PetriNetUnfolderBase]: 3133/4825 cut-off events. [2024-06-20 16:11:33,988 INFO L125 PetriNetUnfolderBase]: For 786135/786141 co-relation queries the response was YES. [2024-06-20 16:11:34,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51950 conditions, 4825 events. 3133/4825 cut-off events. For 786135/786141 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26600 event pairs, 644 based on Foata normal form. 3/4818 useless extension candidates. Maximal degree in co-relation 51811. Up to 4220 conditions per place. [2024-06-20 16:11:34,056 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 338 selfloop transitions, 100 changer transitions 0/442 dead transitions. [2024-06-20 16:11:34,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 442 transitions, 6664 flow [2024-06-20 16:11:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:34,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:11:34,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 16:11:34,057 INFO L175 Difference]: Start difference. First operand has 286 places, 414 transitions, 5306 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:11:34,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 442 transitions, 6664 flow [2024-06-20 16:11:35,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 442 transitions, 6356 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:35,504 INFO L231 Difference]: Finished difference. Result has 288 places, 420 transitions, 5422 flow [2024-06-20 16:11:35,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4998, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5422, PETRI_PLACES=288, PETRI_TRANSITIONS=420} [2024-06-20 16:11:35,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-20 16:11:35,505 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 420 transitions, 5422 flow [2024-06-20 16:11:35,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:35,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:35,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:35,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:11:35,505 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:35,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:35,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1513685312, now seen corresponding path program 4 times [2024-06-20 16:11:35,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:35,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246922283] [2024-06-20 16:11:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:35,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:36,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:36,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246922283] [2024-06-20 16:11:36,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246922283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:36,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:36,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:36,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080683583] [2024-06-20 16:11:36,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:36,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:36,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:36,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:36,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:36,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:36,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 420 transitions, 5422 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:36,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:36,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:36,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:37,666 INFO L124 PetriNetUnfolderBase]: 3124/4825 cut-off events. [2024-06-20 16:11:37,667 INFO L125 PetriNetUnfolderBase]: For 795050/795056 co-relation queries the response was YES. [2024-06-20 16:11:37,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51784 conditions, 4825 events. 3124/4825 cut-off events. For 795050/795056 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26631 event pairs, 619 based on Foata normal form. 2/4823 useless extension candidates. Maximal degree in co-relation 51644. Up to 4544 conditions per place. [2024-06-20 16:11:37,737 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 397 selfloop transitions, 38 changer transitions 0/439 dead transitions. [2024-06-20 16:11:37,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 439 transitions, 6356 flow [2024-06-20 16:11:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:11:37,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:11:37,738 INFO L175 Difference]: Start difference. First operand has 288 places, 420 transitions, 5422 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:11:37,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 439 transitions, 6356 flow [2024-06-20 16:11:39,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 439 transitions, 6113 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:39,516 INFO L231 Difference]: Finished difference. Result has 292 places, 420 transitions, 5261 flow [2024-06-20 16:11:39,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5179, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5261, PETRI_PLACES=292, PETRI_TRANSITIONS=420} [2024-06-20 16:11:39,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-20 16:11:39,517 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 420 transitions, 5261 flow [2024-06-20 16:11:39,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:39,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:39,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:39,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:11:39,518 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:39,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash -861374274, now seen corresponding path program 5 times [2024-06-20 16:11:39,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:39,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807516313] [2024-06-20 16:11:39,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:39,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:40,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:40,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807516313] [2024-06-20 16:11:40,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807516313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:40,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:40,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:40,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513785784] [2024-06-20 16:11:40,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:40,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:40,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:40,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:40,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:40,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:40,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 420 transitions, 5261 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:40,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:40,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:40,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:41,676 INFO L124 PetriNetUnfolderBase]: 3129/4830 cut-off events. [2024-06-20 16:11:41,676 INFO L125 PetriNetUnfolderBase]: For 808129/808135 co-relation queries the response was YES. [2024-06-20 16:11:41,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51890 conditions, 4830 events. 3129/4830 cut-off events. For 808129/808135 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26654 event pairs, 616 based on Foata normal form. 2/4828 useless extension candidates. Maximal degree in co-relation 51748. Up to 4531 conditions per place. [2024-06-20 16:11:41,740 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 388 selfloop transitions, 47 changer transitions 0/439 dead transitions. [2024-06-20 16:11:41,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 439 transitions, 6253 flow [2024-06-20 16:11:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:11:41,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-20 16:11:41,741 INFO L175 Difference]: Start difference. First operand has 292 places, 420 transitions, 5261 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:11:41,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 439 transitions, 6253 flow [2024-06-20 16:11:43,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 439 transitions, 6092 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 16:11:43,734 INFO L231 Difference]: Finished difference. Result has 292 places, 423 transitions, 5276 flow [2024-06-20 16:11:43,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5100, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5276, PETRI_PLACES=292, PETRI_TRANSITIONS=423} [2024-06-20 16:11:43,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-20 16:11:43,735 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 423 transitions, 5276 flow [2024-06-20 16:11:43,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:43,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:43,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:43,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:11:43,736 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:43,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash -162435106, now seen corresponding path program 8 times [2024-06-20 16:11:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:43,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137719737] [2024-06-20 16:11:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:43,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:44,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:44,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137719737] [2024-06-20 16:11:44,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137719737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:44,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:44,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:44,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272329983] [2024-06-20 16:11:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:44,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:44,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:44,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:44,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 423 transitions, 5276 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:44,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:44,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:44,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:45,642 INFO L124 PetriNetUnfolderBase]: 3155/4853 cut-off events. [2024-06-20 16:11:45,642 INFO L125 PetriNetUnfolderBase]: For 841349/841355 co-relation queries the response was YES. [2024-06-20 16:11:45,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52779 conditions, 4853 events. 3155/4853 cut-off events. For 841349/841355 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26676 event pairs, 635 based on Foata normal form. 3/4846 useless extension candidates. Maximal degree in co-relation 52636. Up to 4140 conditions per place. [2024-06-20 16:11:45,707 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 134 changer transitions 0/450 dead transitions. [2024-06-20 16:11:45,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 450 transitions, 6858 flow [2024-06-20 16:11:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:11:45,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 16:11:45,709 INFO L175 Difference]: Start difference. First operand has 292 places, 423 transitions, 5276 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:11:45,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 450 transitions, 6858 flow [2024-06-20 16:11:47,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 450 transitions, 6720 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:47,196 INFO L231 Difference]: Finished difference. Result has 294 places, 429 transitions, 5646 flow [2024-06-20 16:11:47,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5138, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5646, PETRI_PLACES=294, PETRI_TRANSITIONS=429} [2024-06-20 16:11:47,197 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-20 16:11:47,197 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 429 transitions, 5646 flow [2024-06-20 16:11:47,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:47,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:47,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:47,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:11:47,197 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:47,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash -860958564, now seen corresponding path program 6 times [2024-06-20 16:11:47,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:47,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302987862] [2024-06-20 16:11:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:47,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:48,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:48,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302987862] [2024-06-20 16:11:48,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302987862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:48,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:48,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:48,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105958764] [2024-06-20 16:11:48,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:48,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:48,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:48,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:48,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:48,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:48,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 429 transitions, 5646 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:48,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:48,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:48,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:49,212 INFO L124 PetriNetUnfolderBase]: 3160/4873 cut-off events. [2024-06-20 16:11:49,212 INFO L125 PetriNetUnfolderBase]: For 858004/858010 co-relation queries the response was YES. [2024-06-20 16:11:49,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53705 conditions, 4873 events. 3160/4873 cut-off events. For 858004/858010 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 26901 event pairs, 616 based on Foata normal form. 2/4871 useless extension candidates. Maximal degree in co-relation 53561. Up to 4559 conditions per place. [2024-06-20 16:11:49,281 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 386 selfloop transitions, 59 changer transitions 0/449 dead transitions. [2024-06-20 16:11:49,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 449 transitions, 6669 flow [2024-06-20 16:11:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:11:49,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 16:11:49,282 INFO L175 Difference]: Start difference. First operand has 294 places, 429 transitions, 5646 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:11:49,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 449 transitions, 6669 flow [2024-06-20 16:11:51,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 449 transitions, 6366 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:51,511 INFO L231 Difference]: Finished difference. Result has 299 places, 433 transitions, 5573 flow [2024-06-20 16:11:51,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5343, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5573, PETRI_PLACES=299, PETRI_TRANSITIONS=433} [2024-06-20 16:11:51,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-20 16:11:51,512 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 433 transitions, 5573 flow [2024-06-20 16:11:51,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:51,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:51,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:51,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:11:51,512 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:51,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:51,513 INFO L85 PathProgramCache]: Analyzing trace with hash -861137310, now seen corresponding path program 9 times [2024-06-20 16:11:51,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:51,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222240570] [2024-06-20 16:11:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:51,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:52,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:52,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222240570] [2024-06-20 16:11:52,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222240570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:52,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:52,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:52,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654274895] [2024-06-20 16:11:52,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:52,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:52,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:52,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 433 transitions, 5573 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:52,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:52,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:52,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:53,566 INFO L124 PetriNetUnfolderBase]: 3162/4863 cut-off events. [2024-06-20 16:11:53,567 INFO L125 PetriNetUnfolderBase]: For 871553/871559 co-relation queries the response was YES. [2024-06-20 16:11:53,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53673 conditions, 4863 events. 3162/4863 cut-off events. For 871553/871559 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26755 event pairs, 637 based on Foata normal form. 3/4856 useless extension candidates. Maximal degree in co-relation 53526. Up to 4151 conditions per place. [2024-06-20 16:11:53,640 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 315 selfloop transitions, 137 changer transitions 0/456 dead transitions. [2024-06-20 16:11:53,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 456 transitions, 6841 flow [2024-06-20 16:11:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:11:53,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 16:11:53,642 INFO L175 Difference]: Start difference. First operand has 299 places, 433 transitions, 5573 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:11:53,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 456 transitions, 6841 flow [2024-06-20 16:11:55,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 456 transitions, 6688 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 16:11:55,960 INFO L231 Difference]: Finished difference. Result has 302 places, 436 transitions, 5786 flow [2024-06-20 16:11:55,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5420, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5786, PETRI_PLACES=302, PETRI_TRANSITIONS=436} [2024-06-20 16:11:55,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-20 16:11:55,960 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 436 transitions, 5786 flow [2024-06-20 16:11:55,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:55,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:55,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:55,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:11:55,961 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:55,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:55,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1383118894, now seen corresponding path program 7 times [2024-06-20 16:11:55,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:55,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918843522] [2024-06-20 16:11:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:55,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:57,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:57,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918843522] [2024-06-20 16:11:57,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918843522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:57,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:57,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:57,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688836621] [2024-06-20 16:11:57,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:57,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:57,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:57,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:57,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:57,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:11:57,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 436 transitions, 5786 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:57,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:57,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:11:57,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:58,124 INFO L124 PetriNetUnfolderBase]: 3172/4896 cut-off events. [2024-06-20 16:11:58,124 INFO L125 PetriNetUnfolderBase]: For 890308/890318 co-relation queries the response was YES. [2024-06-20 16:11:58,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54358 conditions, 4896 events. 3172/4896 cut-off events. For 890308/890318 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27090 event pairs, 640 based on Foata normal form. 7/4901 useless extension candidates. Maximal degree in co-relation 54210. Up to 4492 conditions per place. [2024-06-20 16:11:58,307 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 373 selfloop transitions, 76 changer transitions 0/453 dead transitions. [2024-06-20 16:11:58,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 453 transitions, 7006 flow [2024-06-20 16:11:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:58,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:11:58,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 16:11:58,309 INFO L175 Difference]: Start difference. First operand has 302 places, 436 transitions, 5786 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:11:58,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 453 transitions, 7006 flow [2024-06-20 16:12:01,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 453 transitions, 6723 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:12:01,364 INFO L231 Difference]: Finished difference. Result has 305 places, 440 transitions, 5758 flow [2024-06-20 16:12:01,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5758, PETRI_PLACES=305, PETRI_TRANSITIONS=440} [2024-06-20 16:12:01,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-20 16:12:01,364 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 440 transitions, 5758 flow [2024-06-20 16:12:01,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:01,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:01,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:01,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:12:01,365 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:01,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1383112384, now seen corresponding path program 8 times [2024-06-20 16:12:01,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:01,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219146632] [2024-06-20 16:12:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:01,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:02,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:02,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219146632] [2024-06-20 16:12:02,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219146632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:02,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:02,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:02,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106435605] [2024-06-20 16:12:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:02,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:02,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:02,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:02,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:02,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:02,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 440 transitions, 5758 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:02,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:02,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:02,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:03,494 INFO L124 PetriNetUnfolderBase]: 3174/4896 cut-off events. [2024-06-20 16:12:03,494 INFO L125 PetriNetUnfolderBase]: For 902285/902295 co-relation queries the response was YES. [2024-06-20 16:12:03,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54131 conditions, 4896 events. 3174/4896 cut-off events. For 902285/902295 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 27053 event pairs, 642 based on Foata normal form. 7/4901 useless extension candidates. Maximal degree in co-relation 53982. Up to 4530 conditions per place. [2024-06-20 16:12:03,562 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 64 changer transitions 0/455 dead transitions. [2024-06-20 16:12:03,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 455 transitions, 6778 flow [2024-06-20 16:12:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:12:03,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-20 16:12:03,563 INFO L175 Difference]: Start difference. First operand has 305 places, 440 transitions, 5758 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:12:03,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 455 transitions, 6778 flow [2024-06-20 16:12:06,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 455 transitions, 6590 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 16:12:06,187 INFO L231 Difference]: Finished difference. Result has 308 places, 443 transitions, 5793 flow [2024-06-20 16:12:06,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5793, PETRI_PLACES=308, PETRI_TRANSITIONS=443} [2024-06-20 16:12:06,188 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-20 16:12:06,188 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 443 transitions, 5793 flow [2024-06-20 16:12:06,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:06,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:06,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:06,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:12:06,188 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:06,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:06,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1428899940, now seen corresponding path program 10 times [2024-06-20 16:12:06,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:06,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39469514] [2024-06-20 16:12:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:06,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:07,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:07,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39469514] [2024-06-20 16:12:07,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39469514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:07,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:07,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:07,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685018191] [2024-06-20 16:12:07,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:07,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:07,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:07,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:07,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 443 transitions, 5793 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:07,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:07,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:07,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:08,256 INFO L124 PetriNetUnfolderBase]: 3194/4929 cut-off events. [2024-06-20 16:12:08,256 INFO L125 PetriNetUnfolderBase]: For 930544/930552 co-relation queries the response was YES. [2024-06-20 16:12:08,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54651 conditions, 4929 events. 3194/4929 cut-off events. For 930544/930552 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27255 event pairs, 716 based on Foata normal form. 5/4932 useless extension candidates. Maximal degree in co-relation 54501. Up to 3993 conditions per place. [2024-06-20 16:12:08,328 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 143 changer transitions 0/468 dead transitions. [2024-06-20 16:12:08,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 468 transitions, 7487 flow [2024-06-20 16:12:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:08,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:12:08,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:12:08,330 INFO L175 Difference]: Start difference. First operand has 308 places, 443 transitions, 5793 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:12:08,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 468 transitions, 7487 flow [2024-06-20 16:12:10,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 468 transitions, 7300 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:10,970 INFO L231 Difference]: Finished difference. Result has 310 places, 450 transitions, 6155 flow [2024-06-20 16:12:10,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5606, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6155, PETRI_PLACES=310, PETRI_TRANSITIONS=450} [2024-06-20 16:12:10,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-20 16:12:10,970 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 450 transitions, 6155 flow [2024-06-20 16:12:10,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:10,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:10,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:10,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:12:10,971 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:10,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1415208650, now seen corresponding path program 9 times [2024-06-20 16:12:10,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:10,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819268913] [2024-06-20 16:12:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:10,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:11,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819268913] [2024-06-20 16:12:11,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819268913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:11,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:11,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:11,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797048316] [2024-06-20 16:12:11,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:11,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:11,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:11,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:12,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:12,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 450 transitions, 6155 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:12,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:12,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:12,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:13,089 INFO L124 PetriNetUnfolderBase]: 3207/4943 cut-off events. [2024-06-20 16:12:13,089 INFO L125 PetriNetUnfolderBase]: For 944731/944741 co-relation queries the response was YES. [2024-06-20 16:12:13,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55857 conditions, 4943 events. 3207/4943 cut-off events. For 944731/944741 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27314 event pairs, 643 based on Foata normal form. 6/4947 useless extension candidates. Maximal degree in co-relation 55706. Up to 4440 conditions per place. [2024-06-20 16:12:13,160 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 127 changer transitions 0/471 dead transitions. [2024-06-20 16:12:13,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 471 transitions, 7682 flow [2024-06-20 16:12:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:13,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:12:13,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-20 16:12:13,162 INFO L175 Difference]: Start difference. First operand has 310 places, 450 transitions, 6155 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:12:13,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 471 transitions, 7682 flow [2024-06-20 16:12:15,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 471 transitions, 7288 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-20 16:12:15,871 INFO L231 Difference]: Finished difference. Result has 313 places, 457 transitions, 6180 flow [2024-06-20 16:12:15,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5761, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6180, PETRI_PLACES=313, PETRI_TRANSITIONS=457} [2024-06-20 16:12:15,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-20 16:12:15,872 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 457 transitions, 6180 flow [2024-06-20 16:12:15,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:15,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:15,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:15,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:12:15,873 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:15,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1560243718, now seen corresponding path program 11 times [2024-06-20 16:12:15,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:15,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416425953] [2024-06-20 16:12:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:15,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:16,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:16,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416425953] [2024-06-20 16:12:16,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416425953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:16,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:16,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:16,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523918826] [2024-06-20 16:12:16,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:16,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:16,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:16,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:16,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:16,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:16,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 457 transitions, 6180 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:16,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:16,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:16,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:17,967 INFO L124 PetriNetUnfolderBase]: 3217/4959 cut-off events. [2024-06-20 16:12:17,967 INFO L125 PetriNetUnfolderBase]: For 960486/960494 co-relation queries the response was YES. [2024-06-20 16:12:18,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55461 conditions, 4959 events. 3217/4959 cut-off events. For 960486/960494 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27406 event pairs, 720 based on Foata normal form. 3/4960 useless extension candidates. Maximal degree in co-relation 55309. Up to 4017 conditions per place. [2024-06-20 16:12:18,034 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 151 changer transitions 0/481 dead transitions. [2024-06-20 16:12:18,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 481 transitions, 7846 flow [2024-06-20 16:12:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:12:18,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:12:18,035 INFO L175 Difference]: Start difference. First operand has 313 places, 457 transitions, 6180 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:12:18,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 481 transitions, 7846 flow [2024-06-20 16:12:20,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 481 transitions, 7632 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 16:12:20,634 INFO L231 Difference]: Finished difference. Result has 317 places, 463 transitions, 6504 flow [2024-06-20 16:12:20,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5966, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6504, PETRI_PLACES=317, PETRI_TRANSITIONS=463} [2024-06-20 16:12:20,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-20 16:12:20,636 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 463 transitions, 6504 flow [2024-06-20 16:12:20,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:20,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:20,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:20,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:12:20,637 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:20,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:20,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1643288546, now seen corresponding path program 12 times [2024-06-20 16:12:20,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:20,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120509957] [2024-06-20 16:12:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:20,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:21,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:21,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120509957] [2024-06-20 16:12:21,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120509957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:21,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:21,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:21,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045029480] [2024-06-20 16:12:21,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:21,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:21,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:21,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:21,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:21,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 463 transitions, 6504 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:21,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:21,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:21,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:22,662 INFO L124 PetriNetUnfolderBase]: 3211/4955 cut-off events. [2024-06-20 16:12:22,663 INFO L125 PetriNetUnfolderBase]: For 971034/971042 co-relation queries the response was YES. [2024-06-20 16:12:22,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55599 conditions, 4955 events. 3211/4955 cut-off events. For 971034/971042 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27424 event pairs, 719 based on Foata normal form. 3/4956 useless extension candidates. Maximal degree in co-relation 55446. Up to 4014 conditions per place. [2024-06-20 16:12:22,732 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 153 changer transitions 0/479 dead transitions. [2024-06-20 16:12:22,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 479 transitions, 7728 flow [2024-06-20 16:12:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:12:22,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 16:12:22,734 INFO L175 Difference]: Start difference. First operand has 317 places, 463 transitions, 6504 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:12:22,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 479 transitions, 7728 flow [2024-06-20 16:12:25,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 479 transitions, 7426 flow, removed 105 selfloop flow, removed 3 redundant places. [2024-06-20 16:12:25,704 INFO L231 Difference]: Finished difference. Result has 322 places, 463 transitions, 6514 flow [2024-06-20 16:12:25,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6514, PETRI_PLACES=322, PETRI_TRANSITIONS=463} [2024-06-20 16:12:25,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-20 16:12:25,705 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 463 transitions, 6514 flow [2024-06-20 16:12:25,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:25,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:25,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:25,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:12:25,706 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:25,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1643109800, now seen corresponding path program 10 times [2024-06-20 16:12:25,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:25,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733448739] [2024-06-20 16:12:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:25,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:26,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:26,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733448739] [2024-06-20 16:12:26,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733448739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:26,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:26,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:26,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950853590] [2024-06-20 16:12:26,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:26,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:26,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:26,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:26,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 463 transitions, 6514 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:26,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:26,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:26,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:27,980 INFO L124 PetriNetUnfolderBase]: 3208/4945 cut-off events. [2024-06-20 16:12:27,981 INFO L125 PetriNetUnfolderBase]: For 969179/969189 co-relation queries the response was YES. [2024-06-20 16:12:28,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55593 conditions, 4945 events. 3208/4945 cut-off events. For 969179/969189 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27342 event pairs, 644 based on Foata normal form. 6/4949 useless extension candidates. Maximal degree in co-relation 55438. Up to 4562 conditions per place. [2024-06-20 16:12:28,056 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 392 selfloop transitions, 80 changer transitions 0/476 dead transitions. [2024-06-20 16:12:28,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 476 transitions, 7700 flow [2024-06-20 16:12:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:12:28,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:12:28,058 INFO L175 Difference]: Start difference. First operand has 322 places, 463 transitions, 6514 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:12:28,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 476 transitions, 7700 flow [2024-06-20 16:12:31,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 476 transitions, 7380 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:31,447 INFO L231 Difference]: Finished difference. Result has 323 places, 463 transitions, 6360 flow [2024-06-20 16:12:31,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6360, PETRI_PLACES=323, PETRI_TRANSITIONS=463} [2024-06-20 16:12:31,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-20 16:12:31,456 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 463 transitions, 6360 flow [2024-06-20 16:12:31,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:31,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:31,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:31,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:12:31,472 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:31,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:31,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1782846844, now seen corresponding path program 11 times [2024-06-20 16:12:31,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:31,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572947537] [2024-06-20 16:12:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:31,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:32,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:32,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572947537] [2024-06-20 16:12:32,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572947537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:32,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:32,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:32,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012082098] [2024-06-20 16:12:32,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:32,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:32,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:32,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:32,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:32,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 463 transitions, 6360 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:32,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:32,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:32,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:33,728 INFO L124 PetriNetUnfolderBase]: 3200/4933 cut-off events. [2024-06-20 16:12:33,728 INFO L125 PetriNetUnfolderBase]: For 980551/980561 co-relation queries the response was YES. [2024-06-20 16:12:33,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55138 conditions, 4933 events. 3200/4933 cut-off events. For 980551/980561 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27245 event pairs, 644 based on Foata normal form. 7/4938 useless extension candidates. Maximal degree in co-relation 54982. Up to 4436 conditions per place. [2024-06-20 16:12:33,809 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 353 selfloop transitions, 119 changer transitions 0/476 dead transitions. [2024-06-20 16:12:33,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 476 transitions, 7548 flow [2024-06-20 16:12:33,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:12:33,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-20 16:12:33,810 INFO L175 Difference]: Start difference. First operand has 323 places, 463 transitions, 6360 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:12:33,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 476 transitions, 7548 flow [2024-06-20 16:12:37,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 476 transitions, 7188 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:37,508 INFO L231 Difference]: Finished difference. Result has 324 places, 463 transitions, 6246 flow [2024-06-20 16:12:37,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6000, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6246, PETRI_PLACES=324, PETRI_TRANSITIONS=463} [2024-06-20 16:12:37,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-20 16:12:37,509 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 463 transitions, 6246 flow [2024-06-20 16:12:37,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:37,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:37,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:37,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:12:37,509 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:37,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:37,510 INFO L85 PathProgramCache]: Analyzing trace with hash -993783138, now seen corresponding path program 12 times [2024-06-20 16:12:37,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:37,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483465861] [2024-06-20 16:12:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:37,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:38,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:38,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483465861] [2024-06-20 16:12:38,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483465861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:38,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:38,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:38,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307168764] [2024-06-20 16:12:38,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:38,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:38,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:38,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:38,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:38,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:38,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 463 transitions, 6246 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:38,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:38,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:38,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:39,840 INFO L124 PetriNetUnfolderBase]: 3195/4927 cut-off events. [2024-06-20 16:12:39,840 INFO L125 PetriNetUnfolderBase]: For 987364/987374 co-relation queries the response was YES. [2024-06-20 16:12:39,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55047 conditions, 4927 events. 3195/4927 cut-off events. For 987364/987374 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27206 event pairs, 641 based on Foata normal form. 6/4931 useless extension candidates. Maximal degree in co-relation 54891. Up to 4563 conditions per place. [2024-06-20 16:12:39,910 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 404 selfloop transitions, 67 changer transitions 0/475 dead transitions. [2024-06-20 16:12:39,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 475 transitions, 7224 flow [2024-06-20 16:12:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 16:12:39,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-20 16:12:39,912 INFO L175 Difference]: Start difference. First operand has 324 places, 463 transitions, 6246 flow. Second operand 8 states and 125 transitions. [2024-06-20 16:12:39,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 475 transitions, 7224 flow [2024-06-20 16:12:42,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 475 transitions, 6908 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:42,782 INFO L231 Difference]: Finished difference. Result has 325 places, 463 transitions, 6070 flow [2024-06-20 16:12:42,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5930, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6070, PETRI_PLACES=325, PETRI_TRANSITIONS=463} [2024-06-20 16:12:42,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-20 16:12:42,782 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 463 transitions, 6070 flow [2024-06-20 16:12:42,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:42,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:42,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:42,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:12:42,783 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:42,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1382989066, now seen corresponding path program 4 times [2024-06-20 16:12:42,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:42,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018179136] [2024-06-20 16:12:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:42,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:43,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:43,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018179136] [2024-06-20 16:12:43,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018179136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:43,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:43,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:43,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681167430] [2024-06-20 16:12:43,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:43,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:43,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:43,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:43,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:43,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:43,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 463 transitions, 6070 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:43,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:43,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:43,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:44,813 INFO L124 PetriNetUnfolderBase]: 3198/4928 cut-off events. [2024-06-20 16:12:44,813 INFO L125 PetriNetUnfolderBase]: For 1010775/1010785 co-relation queries the response was YES. [2024-06-20 16:12:44,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54851 conditions, 4928 events. 3198/4928 cut-off events. For 1010775/1010785 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27181 event pairs, 643 based on Foata normal form. 9/4935 useless extension candidates. Maximal degree in co-relation 54694. Up to 4559 conditions per place. [2024-06-20 16:12:44,883 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 410 selfloop transitions, 65 changer transitions 0/479 dead transitions. [2024-06-20 16:12:44,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 479 transitions, 7202 flow [2024-06-20 16:12:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:12:44,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-20 16:12:44,885 INFO L175 Difference]: Start difference. First operand has 325 places, 463 transitions, 6070 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:12:44,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 479 transitions, 7202 flow [2024-06-20 16:12:48,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 479 transitions, 7018 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:12:48,534 INFO L231 Difference]: Finished difference. Result has 325 places, 466 transitions, 6172 flow [2024-06-20 16:12:48,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5886, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6172, PETRI_PLACES=325, PETRI_TRANSITIONS=466} [2024-06-20 16:12:48,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-20 16:12:48,535 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 466 transitions, 6172 flow [2024-06-20 16:12:48,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:48,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:48,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:48,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:12:48,535 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:48,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1782843248, now seen corresponding path program 5 times [2024-06-20 16:12:48,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:48,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451851282] [2024-06-20 16:12:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:48,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:49,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:49,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451851282] [2024-06-20 16:12:49,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451851282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:49,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:49,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:49,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041035669] [2024-06-20 16:12:49,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:49,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:49,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:49,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:49,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:49,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 466 transitions, 6172 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:49,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:49,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:49,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:50,850 INFO L124 PetriNetUnfolderBase]: 3240/4990 cut-off events. [2024-06-20 16:12:50,850 INFO L125 PetriNetUnfolderBase]: For 1054643/1054653 co-relation queries the response was YES. [2024-06-20 16:12:50,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56554 conditions, 4990 events. 3240/4990 cut-off events. For 1054643/1054653 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27681 event pairs, 633 based on Foata normal form. 7/4995 useless extension candidates. Maximal degree in co-relation 56396. Up to 4333 conditions per place. [2024-06-20 16:12:50,930 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 360 selfloop transitions, 141 changer transitions 0/505 dead transitions. [2024-06-20 16:12:50,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 505 transitions, 8630 flow [2024-06-20 16:12:50,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:12:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:12:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:12:50,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:12:50,931 INFO L175 Difference]: Start difference. First operand has 325 places, 466 transitions, 6172 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:12:50,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 505 transitions, 8630 flow [2024-06-20 16:12:53,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 505 transitions, 8366 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:53,960 INFO L231 Difference]: Finished difference. Result has 331 places, 485 transitions, 6965 flow [2024-06-20 16:12:53,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5908, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6965, PETRI_PLACES=331, PETRI_TRANSITIONS=485} [2024-06-20 16:12:53,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-20 16:12:53,960 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 485 transitions, 6965 flow [2024-06-20 16:12:53,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:53,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:53,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:53,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:12:53,961 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:53,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:53,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1029266828, now seen corresponding path program 6 times [2024-06-20 16:12:53,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:53,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362400400] [2024-06-20 16:12:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:53,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:55,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:55,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362400400] [2024-06-20 16:12:55,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362400400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:55,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:55,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:55,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859321681] [2024-06-20 16:12:55,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:55,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:55,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:55,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:55,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:55,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:12:55,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 485 transitions, 6965 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:55,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:55,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:12:55,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:56,408 INFO L124 PetriNetUnfolderBase]: 3316/5103 cut-off events. [2024-06-20 16:12:56,409 INFO L125 PetriNetUnfolderBase]: For 1130360/1130370 co-relation queries the response was YES. [2024-06-20 16:12:56,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59868 conditions, 5103 events. 3316/5103 cut-off events. For 1130360/1130370 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 28385 event pairs, 648 based on Foata normal form. 9/5110 useless extension candidates. Maximal degree in co-relation 59706. Up to 4594 conditions per place. [2024-06-20 16:12:56,491 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 421 selfloop transitions, 95 changer transitions 0/520 dead transitions. [2024-06-20 16:12:56,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 520 transitions, 9242 flow [2024-06-20 16:12:56,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:12:56,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:12:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:12:56,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:12:56,492 INFO L175 Difference]: Start difference. First operand has 331 places, 485 transitions, 6965 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:12:56,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 520 transitions, 9242 flow [2024-06-20 16:12:59,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 520 transitions, 8892 flow, removed 142 selfloop flow, removed 3 redundant places. [2024-06-20 16:12:59,587 INFO L231 Difference]: Finished difference. Result has 339 places, 501 transitions, 7490 flow [2024-06-20 16:12:59,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6645, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7490, PETRI_PLACES=339, PETRI_TRANSITIONS=501} [2024-06-20 16:12:59,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-20 16:12:59,588 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 501 transitions, 7490 flow [2024-06-20 16:12:59,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:59,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:59,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:59,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:12:59,589 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:59,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:59,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1420914076, now seen corresponding path program 7 times [2024-06-20 16:12:59,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:59,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637766242] [2024-06-20 16:12:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:59,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:00,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:00,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637766242] [2024-06-20 16:13:00,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637766242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:00,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:00,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:00,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540671434] [2024-06-20 16:13:00,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:00,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:00,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:00,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:00,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:00,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:13:00,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 501 transitions, 7490 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:00,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:00,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:13:00,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:02,134 INFO L124 PetriNetUnfolderBase]: 3344/5147 cut-off events. [2024-06-20 16:13:02,134 INFO L125 PetriNetUnfolderBase]: For 1156500/1156510 co-relation queries the response was YES. [2024-06-20 16:13:02,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61179 conditions, 5147 events. 3344/5147 cut-off events. For 1156500/1156510 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 28734 event pairs, 636 based on Foata normal form. 7/5152 useless extension candidates. Maximal degree in co-relation 61013. Up to 4455 conditions per place. [2024-06-20 16:13:02,217 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 379 selfloop transitions, 148 changer transitions 0/531 dead transitions. [2024-06-20 16:13:02,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 531 transitions, 9814 flow [2024-06-20 16:13:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:13:02,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:13:02,218 INFO L175 Difference]: Start difference. First operand has 339 places, 501 transitions, 7490 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:13:02,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 531 transitions, 9814 flow [2024-06-20 16:13:05,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 531 transitions, 9384 flow, removed 179 selfloop flow, removed 4 redundant places. [2024-06-20 16:13:05,864 INFO L231 Difference]: Finished difference. Result has 345 places, 509 transitions, 7736 flow [2024-06-20 16:13:05,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7142, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7736, PETRI_PLACES=345, PETRI_TRANSITIONS=509} [2024-06-20 16:13:05,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-20 16:13:05,865 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 509 transitions, 7736 flow [2024-06-20 16:13:05,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:05,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:05,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:05,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:13:05,866 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:05,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1383358028, now seen corresponding path program 8 times [2024-06-20 16:13:05,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:05,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825113315] [2024-06-20 16:13:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:05,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:07,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:07,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825113315] [2024-06-20 16:13:07,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825113315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:07,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:07,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:07,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634369662] [2024-06-20 16:13:07,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:07,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:07,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:07,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:13:07,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 509 transitions, 7736 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:07,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:07,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:13:07,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:08,539 INFO L124 PetriNetUnfolderBase]: 3340/5148 cut-off events. [2024-06-20 16:13:08,540 INFO L125 PetriNetUnfolderBase]: For 1153559/1153569 co-relation queries the response was YES. [2024-06-20 16:13:08,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60981 conditions, 5148 events. 3340/5148 cut-off events. For 1153559/1153569 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 28811 event pairs, 642 based on Foata normal form. 7/5153 useless extension candidates. Maximal degree in co-relation 60812. Up to 4680 conditions per place. [2024-06-20 16:13:08,616 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 439 selfloop transitions, 86 changer transitions 0/529 dead transitions. [2024-06-20 16:13:08,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 529 transitions, 9306 flow [2024-06-20 16:13:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 16:13:08,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 16:13:08,617 INFO L175 Difference]: Start difference. First operand has 345 places, 509 transitions, 7736 flow. Second operand 9 states and 143 transitions. [2024-06-20 16:13:08,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 529 transitions, 9306 flow [2024-06-20 16:13:12,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 529 transitions, 8924 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-20 16:13:12,124 INFO L231 Difference]: Finished difference. Result has 350 places, 513 transitions, 7728 flow [2024-06-20 16:13:12,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7358, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7728, PETRI_PLACES=350, PETRI_TRANSITIONS=513} [2024-06-20 16:13:12,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-20 16:13:12,125 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 513 transitions, 7728 flow [2024-06-20 16:13:12,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:12,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:12,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:12,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:13:12,140 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:12,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1782855772, now seen corresponding path program 2 times [2024-06-20 16:13:12,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:12,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213034895] [2024-06-20 16:13:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:12,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:14,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:14,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213034895] [2024-06-20 16:13:14,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213034895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:14,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:14,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:14,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469983030] [2024-06-20 16:13:14,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:14,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:14,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:14,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:14,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:14,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:13:14,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 513 transitions, 7728 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:14,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:14,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:13:14,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:15,487 INFO L124 PetriNetUnfolderBase]: 3345/5162 cut-off events. [2024-06-20 16:13:15,487 INFO L125 PetriNetUnfolderBase]: For 1172432/1172444 co-relation queries the response was YES. [2024-06-20 16:13:15,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61004 conditions, 5162 events. 3345/5162 cut-off events. For 1172432/1172444 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28912 event pairs, 631 based on Foata normal form. 13/5174 useless extension candidates. Maximal degree in co-relation 60833. Up to 4935 conditions per place. [2024-06-20 16:13:15,569 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 482 selfloop transitions, 44 changer transitions 0/530 dead transitions. [2024-06-20 16:13:15,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 530 transitions, 8964 flow [2024-06-20 16:13:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-20 16:13:15,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-20 16:13:15,570 INFO L175 Difference]: Start difference. First operand has 350 places, 513 transitions, 7728 flow. Second operand 9 states and 134 transitions. [2024-06-20 16:13:15,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 530 transitions, 8964 flow [2024-06-20 16:13:19,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 530 transitions, 8730 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-20 16:13:19,166 INFO L231 Difference]: Finished difference. Result has 354 places, 516 transitions, 7734 flow [2024-06-20 16:13:19,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7494, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7734, PETRI_PLACES=354, PETRI_TRANSITIONS=516} [2024-06-20 16:13:19,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-20 16:13:19,167 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 516 transitions, 7734 flow [2024-06-20 16:13:19,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:19,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:19,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:13:19,167 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:19,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:19,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1797140572, now seen corresponding path program 3 times [2024-06-20 16:13:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:19,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236316908] [2024-06-20 16:13:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:19,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:20,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:20,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236316908] [2024-06-20 16:13:20,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236316908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:20,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:20,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:20,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298117702] [2024-06-20 16:13:20,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:20,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:20,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:20,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:20,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:13:20,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 516 transitions, 7734 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:20,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:20,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:13:20,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:22,243 INFO L124 PetriNetUnfolderBase]: 3342/5149 cut-off events. [2024-06-20 16:13:22,243 INFO L125 PetriNetUnfolderBase]: For 1185656/1185658 co-relation queries the response was YES. [2024-06-20 16:13:22,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61041 conditions, 5149 events. 3342/5149 cut-off events. For 1185656/1185658 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28736 event pairs, 665 based on Foata normal form. 1/5149 useless extension candidates. Maximal degree in co-relation 60868. Up to 4972 conditions per place. [2024-06-20 16:13:22,332 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 23 changer transitions 0/532 dead transitions. [2024-06-20 16:13:22,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 532 transitions, 8970 flow [2024-06-20 16:13:22,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-20 16:13:22,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439024390243902 [2024-06-20 16:13:22,333 INFO L175 Difference]: Start difference. First operand has 354 places, 516 transitions, 7734 flow. Second operand 10 states and 141 transitions. [2024-06-20 16:13:22,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 532 transitions, 8970 flow [2024-06-20 16:13:25,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 532 transitions, 8750 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-20 16:13:25,522 INFO L231 Difference]: Finished difference. Result has 357 places, 519 transitions, 7719 flow [2024-06-20 16:13:25,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7514, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7719, PETRI_PLACES=357, PETRI_TRANSITIONS=519} [2024-06-20 16:13:25,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-20 16:13:25,522 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 519 transitions, 7719 flow [2024-06-20 16:13:25,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:25,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:25,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:25,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:13:25,523 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:25,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:25,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1407104506, now seen corresponding path program 9 times [2024-06-20 16:13:25,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:25,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259757897] [2024-06-20 16:13:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:25,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:26,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:26,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259757897] [2024-06-20 16:13:26,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259757897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:26,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:26,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:26,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134626873] [2024-06-20 16:13:26,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:26,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:26,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:26,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:13:26,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 519 transitions, 7719 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:26,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:26,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:13:26,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:28,093 INFO L124 PetriNetUnfolderBase]: 3366/5187 cut-off events. [2024-06-20 16:13:28,094 INFO L125 PetriNetUnfolderBase]: For 1223194/1223200 co-relation queries the response was YES. [2024-06-20 16:13:28,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61846 conditions, 5187 events. 3366/5187 cut-off events. For 1223194/1223200 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29011 event pairs, 668 based on Foata normal form. 8/5194 useless extension candidates. Maximal degree in co-relation 61672. Up to 4905 conditions per place. [2024-06-20 16:13:28,178 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 476 selfloop transitions, 61 changer transitions 0/541 dead transitions. [2024-06-20 16:13:28,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 541 transitions, 9607 flow [2024-06-20 16:13:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 16:13:28,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-20 16:13:28,179 INFO L175 Difference]: Start difference. First operand has 357 places, 519 transitions, 7719 flow. Second operand 9 states and 141 transitions. [2024-06-20 16:13:28,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 541 transitions, 9607 flow [2024-06-20 16:13:31,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 541 transitions, 9302 flow, removed 131 selfloop flow, removed 8 redundant places. [2024-06-20 16:13:31,175 INFO L231 Difference]: Finished difference. Result has 359 places, 527 transitions, 7909 flow [2024-06-20 16:13:31,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7414, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7909, PETRI_PLACES=359, PETRI_TRANSITIONS=527} [2024-06-20 16:13:31,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-20 16:13:31,175 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 527 transitions, 7909 flow [2024-06-20 16:13:31,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:31,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:31,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:31,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:13:31,176 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:31,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1820769436, now seen corresponding path program 10 times [2024-06-20 16:13:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:31,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086982448] [2024-06-20 16:13:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:32,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086982448] [2024-06-20 16:13:32,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086982448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:32,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:32,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:32,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594291451] [2024-06-20 16:13:32,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:32,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:32,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:32,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:32,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:13:32,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 527 transitions, 7909 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:32,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:32,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:13:32,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:33,637 INFO L124 PetriNetUnfolderBase]: 3368/5189 cut-off events. [2024-06-20 16:13:33,637 INFO L125 PetriNetUnfolderBase]: For 1232883/1232893 co-relation queries the response was YES. [2024-06-20 16:13:33,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62228 conditions, 5189 events. 3368/5189 cut-off events. For 1232883/1232893 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29037 event pairs, 644 based on Foata normal form. 7/5194 useless extension candidates. Maximal degree in co-relation 62052. Up to 4796 conditions per place. [2024-06-20 16:13:33,725 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 470 selfloop transitions, 70 changer transitions 0/544 dead transitions. [2024-06-20 16:13:33,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 544 transitions, 9203 flow [2024-06-20 16:13:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:33,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 16:13:33,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-20 16:13:33,726 INFO L175 Difference]: Start difference. First operand has 359 places, 527 transitions, 7909 flow. Second operand 9 states and 140 transitions. [2024-06-20 16:13:33,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 544 transitions, 9203 flow [2024-06-20 16:13:37,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 544 transitions, 8668 flow, removed 129 selfloop flow, removed 9 redundant places. [2024-06-20 16:13:37,833 INFO L231 Difference]: Finished difference. Result has 359 places, 531 transitions, 7705 flow [2024-06-20 16:13:37,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7374, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7705, PETRI_PLACES=359, PETRI_TRANSITIONS=531} [2024-06-20 16:13:37,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-20 16:13:37,834 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 531 transitions, 7705 flow [2024-06-20 16:13:37,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:37,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:37,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:37,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:13:37,834 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:37,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:37,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1021717790, now seen corresponding path program 1 times [2024-06-20 16:13:37,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:37,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064488411] [2024-06-20 16:13:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:37,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:38,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064488411] [2024-06-20 16:13:38,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064488411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:38,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:38,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:38,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132161756] [2024-06-20 16:13:38,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:38,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:38,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:38,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:38,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:13:38,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 531 transitions, 7705 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:38,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:38,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:13:38,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:40,169 INFO L124 PetriNetUnfolderBase]: 3247/5074 cut-off events. [2024-06-20 16:13:40,169 INFO L125 PetriNetUnfolderBase]: For 1257879/1257881 co-relation queries the response was YES. [2024-06-20 16:13:40,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61075 conditions, 5074 events. 3247/5074 cut-off events. For 1257879/1257881 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 28994 event pairs, 587 based on Foata normal form. 2/5075 useless extension candidates. Maximal degree in co-relation 60902. Up to 4698 conditions per place. [2024-06-20 16:13:40,254 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 508 selfloop transitions, 17 changer transitions 0/555 dead transitions. [2024-06-20 16:13:40,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 555 transitions, 8895 flow [2024-06-20 16:13:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:13:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:13:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:13:40,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 16:13:40,255 INFO L175 Difference]: Start difference. First operand has 359 places, 531 transitions, 7705 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:13:40,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 555 transitions, 8895 flow [2024-06-20 16:13:44,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 555 transitions, 8616 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-20 16:13:44,362 INFO L231 Difference]: Finished difference. Result has 360 places, 533 transitions, 7545 flow [2024-06-20 16:13:44,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7426, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7545, PETRI_PLACES=360, PETRI_TRANSITIONS=533} [2024-06-20 16:13:44,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-20 16:13:44,362 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 533 transitions, 7545 flow [2024-06-20 16:13:44,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:44,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:44,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:44,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:13:44,363 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:44,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:44,365 INFO L85 PathProgramCache]: Analyzing trace with hash -979216062, now seen corresponding path program 2 times [2024-06-20 16:13:44,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:44,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301311500] [2024-06-20 16:13:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:44,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:45,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:45,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301311500] [2024-06-20 16:13:45,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301311500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:45,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:45,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:45,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139850946] [2024-06-20 16:13:45,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:45,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:45,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:45,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:45,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:45,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:13:45,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 533 transitions, 7545 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:45,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:45,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:13:45,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:46,920 INFO L124 PetriNetUnfolderBase]: 3255/5084 cut-off events. [2024-06-20 16:13:46,920 INFO L125 PetriNetUnfolderBase]: For 1279128/1279130 co-relation queries the response was YES. [2024-06-20 16:13:46,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61184 conditions, 5084 events. 3255/5084 cut-off events. For 1279128/1279130 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 29032 event pairs, 618 based on Foata normal form. 2/5083 useless extension candidates. Maximal degree in co-relation 61010. Up to 4719 conditions per place. [2024-06-20 16:13:47,008 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 503 selfloop transitions, 21 changer transitions 0/554 dead transitions. [2024-06-20 16:13:47,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 554 transitions, 8735 flow [2024-06-20 16:13:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:13:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:13:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:13:47,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:13:47,009 INFO L175 Difference]: Start difference. First operand has 360 places, 533 transitions, 7545 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:13:47,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 554 transitions, 8735 flow [2024-06-20 16:13:50,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 554 transitions, 8630 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:13:50,867 INFO L231 Difference]: Finished difference. Result has 362 places, 535 transitions, 7572 flow [2024-06-20 16:13:50,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7572, PETRI_PLACES=362, PETRI_TRANSITIONS=535} [2024-06-20 16:13:50,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-20 16:13:50,867 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 535 transitions, 7572 flow [2024-06-20 16:13:50,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:50,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:50,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:50,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:13:50,868 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:50,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:50,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1277263936, now seen corresponding path program 1 times [2024-06-20 16:13:50,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:50,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390066520] [2024-06-20 16:13:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:50,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:51,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:51,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390066520] [2024-06-20 16:13:51,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390066520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:51,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:51,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:51,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262193833] [2024-06-20 16:13:51,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:51,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:51,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:51,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:52,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:13:52,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 535 transitions, 7572 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:52,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:52,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:13:52,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:53,402 INFO L124 PetriNetUnfolderBase]: 3249/5069 cut-off events. [2024-06-20 16:13:53,402 INFO L125 PetriNetUnfolderBase]: For 1288031/1288033 co-relation queries the response was YES. [2024-06-20 16:13:53,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61016 conditions, 5069 events. 3249/5069 cut-off events. For 1288031/1288033 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 28924 event pairs, 629 based on Foata normal form. 2/5070 useless extension candidates. Maximal degree in co-relation 60841. Up to 4709 conditions per place. [2024-06-20 16:13:53,483 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 502 selfloop transitions, 25 changer transitions 0/557 dead transitions. [2024-06-20 16:13:53,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 557 transitions, 8792 flow [2024-06-20 16:13:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:13:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:13:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:13:53,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:13:53,484 INFO L175 Difference]: Start difference. First operand has 362 places, 535 transitions, 7572 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:13:53,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 557 transitions, 8792 flow [2024-06-20 16:13:57,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 557 transitions, 8678 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 16:13:57,398 INFO L231 Difference]: Finished difference. Result has 364 places, 538 transitions, 7620 flow [2024-06-20 16:13:57,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7458, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7620, PETRI_PLACES=364, PETRI_TRANSITIONS=538} [2024-06-20 16:13:57,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-20 16:13:57,399 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 538 transitions, 7620 flow [2024-06-20 16:13:57,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:57,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:57,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:57,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:13:57,400 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:57,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:57,400 INFO L85 PathProgramCache]: Analyzing trace with hash -861128382, now seen corresponding path program 3 times [2024-06-20 16:13:57,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:57,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288052378] [2024-06-20 16:13:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:57,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:58,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:58,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288052378] [2024-06-20 16:13:58,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288052378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:58,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:58,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:58,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760976736] [2024-06-20 16:13:58,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:58,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:58,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:58,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:13:58,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 538 transitions, 7620 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:58,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:58,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:13:58,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:59,989 INFO L124 PetriNetUnfolderBase]: 3257/5086 cut-off events. [2024-06-20 16:13:59,990 INFO L125 PetriNetUnfolderBase]: For 1309201/1309203 co-relation queries the response was YES. [2024-06-20 16:14:00,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61501 conditions, 5086 events. 3257/5086 cut-off events. For 1309201/1309203 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29062 event pairs, 612 based on Foata normal form. 2/5083 useless extension candidates. Maximal degree in co-relation 61325. Up to 4717 conditions per place. [2024-06-20 16:14:00,079 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 26 changer transitions 0/557 dead transitions. [2024-06-20 16:14:00,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 557 transitions, 8822 flow [2024-06-20 16:14:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:14:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:14:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:14:00,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:14:00,081 INFO L175 Difference]: Start difference. First operand has 364 places, 538 transitions, 7620 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:14:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 557 transitions, 8822 flow [2024-06-20 16:14:04,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 557 transitions, 8696 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 16:14:04,120 INFO L231 Difference]: Finished difference. Result has 366 places, 540 transitions, 7641 flow [2024-06-20 16:14:04,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7494, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7641, PETRI_PLACES=366, PETRI_TRANSITIONS=540} [2024-06-20 16:14:04,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-20 16:14:04,121 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 540 transitions, 7641 flow [2024-06-20 16:14:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:04,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:04,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:04,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:14:04,122 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:04,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash -860943684, now seen corresponding path program 1 times [2024-06-20 16:14:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:04,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091606652] [2024-06-20 16:14:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:05,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:05,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091606652] [2024-06-20 16:14:05,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091606652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:05,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:05,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:05,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107865768] [2024-06-20 16:14:05,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:05,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:05,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:05,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:14:05,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 540 transitions, 7641 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:05,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:05,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:14:05,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:06,896 INFO L124 PetriNetUnfolderBase]: 3379/5200 cut-off events. [2024-06-20 16:14:06,897 INFO L125 PetriNetUnfolderBase]: For 1313750/1313752 co-relation queries the response was YES. [2024-06-20 16:14:06,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62301 conditions, 5200 events. 3379/5200 cut-off events. For 1313750/1313752 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29089 event pairs, 668 based on Foata normal form. 1/5200 useless extension candidates. Maximal degree in co-relation 62124. Up to 5026 conditions per place. [2024-06-20 16:14:07,011 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 531 selfloop transitions, 19 changer transitions 0/554 dead transitions. [2024-06-20 16:14:07,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 554 transitions, 8781 flow [2024-06-20 16:14:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:14:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:14:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 16:14:07,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-20 16:14:07,013 INFO L175 Difference]: Start difference. First operand has 366 places, 540 transitions, 7641 flow. Second operand 8 states and 121 transitions. [2024-06-20 16:14:07,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 554 transitions, 8781 flow [2024-06-20 16:14:11,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 554 transitions, 8628 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 16:14:11,680 INFO L231 Difference]: Finished difference. Result has 368 places, 540 transitions, 7534 flow [2024-06-20 16:14:11,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7488, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7534, PETRI_PLACES=368, PETRI_TRANSITIONS=540} [2024-06-20 16:14:11,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-20 16:14:11,680 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 540 transitions, 7534 flow [2024-06-20 16:14:11,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:11,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:11,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:11,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:14:11,681 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:11,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:11,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1560489796, now seen corresponding path program 4 times [2024-06-20 16:14:11,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:11,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647839812] [2024-06-20 16:14:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:11,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:12,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:12,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647839812] [2024-06-20 16:14:12,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647839812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:12,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:12,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:12,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362619634] [2024-06-20 16:14:12,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:12,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:12,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:12,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:12,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:14:12,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 540 transitions, 7534 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:12,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:12,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:14:12,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:14,216 INFO L124 PetriNetUnfolderBase]: 3237/5059 cut-off events. [2024-06-20 16:14:14,216 INFO L125 PetriNetUnfolderBase]: For 1328336/1328340 co-relation queries the response was YES. [2024-06-20 16:14:14,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61120 conditions, 5059 events. 3237/5059 cut-off events. For 1328336/1328340 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 28934 event pairs, 618 based on Foata normal form. 2/5052 useless extension candidates. Maximal degree in co-relation 60942. Up to 4678 conditions per place. [2024-06-20 16:14:14,298 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 493 selfloop transitions, 33 changer transitions 0/556 dead transitions. [2024-06-20 16:14:14,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 556 transitions, 8728 flow [2024-06-20 16:14:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:14:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:14:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:14:14,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 16:14:14,300 INFO L175 Difference]: Start difference. First operand has 368 places, 540 transitions, 7534 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:14:14,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 556 transitions, 8728 flow [2024-06-20 16:14:19,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 556 transitions, 8647 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:14:19,116 INFO L231 Difference]: Finished difference. Result has 369 places, 542 transitions, 7618 flow [2024-06-20 16:14:19,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7453, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7618, PETRI_PLACES=369, PETRI_TRANSITIONS=542} [2024-06-20 16:14:19,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-20 16:14:19,117 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 542 transitions, 7618 flow [2024-06-20 16:14:19,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:19,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:19,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:19,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:14:19,117 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:19,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:19,118 INFO L85 PathProgramCache]: Analyzing trace with hash -341613538, now seen corresponding path program 1 times [2024-06-20 16:14:19,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:19,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535029585] [2024-06-20 16:14:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:19,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:20,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:20,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535029585] [2024-06-20 16:14:20,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535029585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:20,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:20,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327157990] [2024-06-20 16:14:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:20,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:20,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:20,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:14:20,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 542 transitions, 7618 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:20,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:20,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:14:20,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:21,491 INFO L124 PetriNetUnfolderBase]: 3390/5222 cut-off events. [2024-06-20 16:14:21,492 INFO L125 PetriNetUnfolderBase]: For 1353340/1353350 co-relation queries the response was YES. [2024-06-20 16:14:21,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62599 conditions, 5222 events. 3390/5222 cut-off events. For 1353340/1353350 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 29112 event pairs, 462 based on Foata normal form. 14/5235 useless extension candidates. Maximal degree in co-relation 62420. Up to 4838 conditions per place. [2024-06-20 16:14:21,576 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 532 selfloop transitions, 40 changer transitions 0/576 dead transitions. [2024-06-20 16:14:21,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 576 transitions, 9006 flow [2024-06-20 16:14:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:14:21,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-20 16:14:21,577 INFO L175 Difference]: Start difference. First operand has 369 places, 542 transitions, 7618 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:14:21,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 576 transitions, 9006 flow [2024-06-20 16:14:26,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 576 transitions, 8857 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 16:14:26,913 INFO L231 Difference]: Finished difference. Result has 372 places, 545 transitions, 7707 flow [2024-06-20 16:14:26,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7469, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7707, PETRI_PLACES=372, PETRI_TRANSITIONS=545} [2024-06-20 16:14:26,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-20 16:14:26,914 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 545 transitions, 7707 flow [2024-06-20 16:14:26,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:26,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:26,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:26,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:14:26,914 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:26,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash -332090338, now seen corresponding path program 2 times [2024-06-20 16:14:26,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:26,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358300559] [2024-06-20 16:14:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:26,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:27,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:27,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358300559] [2024-06-20 16:14:27,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358300559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:27,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:27,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:27,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415718932] [2024-06-20 16:14:27,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:27,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:27,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:27,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:14:27,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 545 transitions, 7707 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:27,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:27,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:14:27,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:29,387 INFO L124 PetriNetUnfolderBase]: 3406/5254 cut-off events. [2024-06-20 16:14:29,387 INFO L125 PetriNetUnfolderBase]: For 1377211/1377221 co-relation queries the response was YES. [2024-06-20 16:14:29,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63342 conditions, 5254 events. 3406/5254 cut-off events. For 1377211/1377221 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29446 event pairs, 609 based on Foata normal form. 14/5267 useless extension candidates. Maximal degree in co-relation 63162. Up to 4925 conditions per place. [2024-06-20 16:14:29,472 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 528 selfloop transitions, 42 changer transitions 0/574 dead transitions. [2024-06-20 16:14:29,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 574 transitions, 9083 flow [2024-06-20 16:14:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:14:29,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:14:29,474 INFO L175 Difference]: Start difference. First operand has 372 places, 545 transitions, 7707 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:14:29,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 574 transitions, 9083 flow [2024-06-20 16:14:33,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 574 transitions, 8867 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-20 16:14:33,946 INFO L231 Difference]: Finished difference. Result has 374 places, 548 transitions, 7739 flow [2024-06-20 16:14:33,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7491, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7739, PETRI_PLACES=374, PETRI_TRANSITIONS=548} [2024-06-20 16:14:33,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-20 16:14:33,947 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 548 transitions, 7739 flow [2024-06-20 16:14:33,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:33,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:33,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:33,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:14:33,947 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:33,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1496161462, now seen corresponding path program 3 times [2024-06-20 16:14:33,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:33,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608170009] [2024-06-20 16:14:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:33,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:35,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:35,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608170009] [2024-06-20 16:14:35,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608170009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:35,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:35,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:35,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903449664] [2024-06-20 16:14:35,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:35,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:35,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:35,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:35,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:35,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:14:35,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 548 transitions, 7739 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:35,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:35,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:14:35,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:36,471 INFO L124 PetriNetUnfolderBase]: 3422/5278 cut-off events. [2024-06-20 16:14:36,471 INFO L125 PetriNetUnfolderBase]: For 1401269/1401279 co-relation queries the response was YES. [2024-06-20 16:14:36,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63807 conditions, 5278 events. 3422/5278 cut-off events. For 1401269/1401279 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29631 event pairs, 604 based on Foata normal form. 14/5291 useless extension candidates. Maximal degree in co-relation 63626. Up to 4939 conditions per place. [2024-06-20 16:14:36,558 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 533 selfloop transitions, 41 changer transitions 0/578 dead transitions. [2024-06-20 16:14:36,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 578 transitions, 9131 flow [2024-06-20 16:14:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:14:36,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:14:36,560 INFO L175 Difference]: Start difference. First operand has 374 places, 548 transitions, 7739 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:14:36,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 578 transitions, 9131 flow [2024-06-20 16:14:41,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 578 transitions, 8905 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-20 16:14:41,428 INFO L231 Difference]: Finished difference. Result has 376 places, 551 transitions, 7765 flow [2024-06-20 16:14:41,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7513, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7765, PETRI_PLACES=376, PETRI_TRANSITIONS=551} [2024-06-20 16:14:41,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-20 16:14:41,429 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 551 transitions, 7765 flow [2024-06-20 16:14:41,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:41,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:41,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:41,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:14:41,429 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:41,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1495823128, now seen corresponding path program 1 times [2024-06-20 16:14:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:41,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163327692] [2024-06-20 16:14:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:41,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:42,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:42,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163327692] [2024-06-20 16:14:42,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163327692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:42,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:42,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:14:42,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475035039] [2024-06-20 16:14:42,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:42,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:14:42,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:14:42,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:14:42,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:14:42,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 551 transitions, 7765 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:42,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:42,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:14:42,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:44,259 INFO L124 PetriNetUnfolderBase]: 3424/5281 cut-off events. [2024-06-20 16:14:44,259 INFO L125 PetriNetUnfolderBase]: For 1397969/1397979 co-relation queries the response was YES. [2024-06-20 16:14:44,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63781 conditions, 5281 events. 3424/5281 cut-off events. For 1397969/1397979 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29664 event pairs, 610 based on Foata normal form. 12/5292 useless extension candidates. Maximal degree in co-relation 63599. Up to 4952 conditions per place. [2024-06-20 16:14:44,353 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 530 selfloop transitions, 47 changer transitions 0/581 dead transitions. [2024-06-20 16:14:44,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 581 transitions, 9162 flow [2024-06-20 16:14:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:14:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:14:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-20 16:14:44,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-20 16:14:44,355 INFO L175 Difference]: Start difference. First operand has 376 places, 551 transitions, 7765 flow. Second operand 10 states and 161 transitions. [2024-06-20 16:14:44,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 581 transitions, 9162 flow [2024-06-20 16:14:48,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 581 transitions, 8932 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-20 16:14:48,944 INFO L231 Difference]: Finished difference. Result has 379 places, 555 transitions, 7803 flow [2024-06-20 16:14:48,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7535, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7803, PETRI_PLACES=379, PETRI_TRANSITIONS=555} [2024-06-20 16:14:48,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-20 16:14:48,944 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 555 transitions, 7803 flow [2024-06-20 16:14:48,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:48,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:48,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:48,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:14:48,945 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:48,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:48,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1589894896, now seen corresponding path program 1 times [2024-06-20 16:14:48,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:48,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240561436] [2024-06-20 16:14:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:48,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:49,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:49,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240561436] [2024-06-20 16:14:49,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240561436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:49,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:49,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:14:49,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070178829] [2024-06-20 16:14:49,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:49,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:14:49,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:49,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:14:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:14:49,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:14:49,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 555 transitions, 7803 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:49,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:49,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:14:49,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:51,168 INFO L124 PetriNetUnfolderBase]: 3434/5300 cut-off events. [2024-06-20 16:14:51,168 INFO L125 PetriNetUnfolderBase]: For 1416517/1416525 co-relation queries the response was YES. [2024-06-20 16:14:51,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63892 conditions, 5300 events. 3434/5300 cut-off events. For 1416517/1416525 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 29786 event pairs, 629 based on Foata normal form. 8/5307 useless extension candidates. Maximal degree in co-relation 63709. Up to 4678 conditions per place. [2024-06-20 16:14:51,262 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 495 selfloop transitions, 93 changer transitions 0/592 dead transitions. [2024-06-20 16:14:51,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 592 transitions, 9245 flow [2024-06-20 16:14:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:14:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:14:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:14:51,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 16:14:51,264 INFO L175 Difference]: Start difference. First operand has 379 places, 555 transitions, 7803 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:14:51,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 592 transitions, 9245 flow [2024-06-20 16:14:55,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 592 transitions, 9014 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-20 16:14:55,966 INFO L231 Difference]: Finished difference. Result has 380 places, 563 transitions, 7935 flow [2024-06-20 16:14:55,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7572, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7935, PETRI_PLACES=380, PETRI_TRANSITIONS=563} [2024-06-20 16:14:55,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-20 16:14:55,967 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 563 transitions, 7935 flow [2024-06-20 16:14:55,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:55,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:55,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:55,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:14:55,968 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:55,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1027398148, now seen corresponding path program 2 times [2024-06-20 16:14:55,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:55,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572460831] [2024-06-20 16:14:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:55,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:56,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:56,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572460831] [2024-06-20 16:14:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572460831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:56,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:56,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:14:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353734215] [2024-06-20 16:14:56,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:56,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:14:56,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:14:56,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:14:56,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:14:56,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 563 transitions, 7935 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:56,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:56,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:14:56,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:58,241 INFO L124 PetriNetUnfolderBase]: 3460/5340 cut-off events. [2024-06-20 16:14:58,242 INFO L125 PetriNetUnfolderBase]: For 1454780/1454788 co-relation queries the response was YES. [2024-06-20 16:14:58,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65162 conditions, 5340 events. 3460/5340 cut-off events. For 1454780/1454788 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 30061 event pairs, 630 based on Foata normal form. 8/5347 useless extension candidates. Maximal degree in co-relation 64977. Up to 4671 conditions per place. [2024-06-20 16:14:58,338 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 491 selfloop transitions, 101 changer transitions 0/596 dead transitions. [2024-06-20 16:14:58,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 596 transitions, 9673 flow [2024-06-20 16:14:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:14:58,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:14:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:14:58,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:14:58,339 INFO L175 Difference]: Start difference. First operand has 380 places, 563 transitions, 7935 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:14:58,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 596 transitions, 9673 flow [2024-06-20 16:15:03,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 596 transitions, 9456 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-20 16:15:03,554 INFO L231 Difference]: Finished difference. Result has 384 places, 569 transitions, 8124 flow [2024-06-20 16:15:03,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7718, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8124, PETRI_PLACES=384, PETRI_TRANSITIONS=569} [2024-06-20 16:15:03,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-20 16:15:03,554 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 569 transitions, 8124 flow [2024-06-20 16:15:03,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:03,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:03,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:03,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:15:03,555 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:03,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1906276305, now seen corresponding path program 1 times [2024-06-20 16:15:03,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:03,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338626701] [2024-06-20 16:15:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:03,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:04,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:04,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338626701] [2024-06-20 16:15:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338626701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:04,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:04,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:15:04,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766845849] [2024-06-20 16:15:04,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:04,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:15:04,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:04,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:15:04,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:15:04,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:15:04,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 569 transitions, 8124 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:04,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:04,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:15:04,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:06,136 INFO L124 PetriNetUnfolderBase]: 3454/5315 cut-off events. [2024-06-20 16:15:06,136 INFO L125 PetriNetUnfolderBase]: For 1459186/1459190 co-relation queries the response was YES. [2024-06-20 16:15:06,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64974 conditions, 5315 events. 3454/5315 cut-off events. For 1459186/1459190 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29849 event pairs, 625 based on Foata normal form. 2/5316 useless extension candidates. Maximal degree in co-relation 64788. Up to 4680 conditions per place. [2024-06-20 16:15:06,218 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 497 selfloop transitions, 94 changer transitions 0/595 dead transitions. [2024-06-20 16:15:06,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 595 transitions, 9408 flow [2024-06-20 16:15:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:15:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:15:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:15:06,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 16:15:06,220 INFO L175 Difference]: Start difference. First operand has 384 places, 569 transitions, 8124 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:15:06,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 595 transitions, 9408 flow [2024-06-20 16:15:11,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 595 transitions, 9153 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-20 16:15:11,283 INFO L231 Difference]: Finished difference. Result has 388 places, 569 transitions, 8073 flow [2024-06-20 16:15:11,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7869, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8073, PETRI_PLACES=388, PETRI_TRANSITIONS=569} [2024-06-20 16:15:11,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-20 16:15:11,283 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 569 transitions, 8073 flow [2024-06-20 16:15:11,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:11,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:11,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:11,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:15:11,284 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:11,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash -11195816, now seen corresponding path program 3 times [2024-06-20 16:15:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:11,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965642750] [2024-06-20 16:15:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:11,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:11,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965642750] [2024-06-20 16:15:11,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965642750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:11,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:11,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:15:11,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826017509] [2024-06-20 16:15:11,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:11,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:15:11,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:15:11,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:15:12,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:15:12,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 569 transitions, 8073 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:12,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:12,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:15:12,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:13,510 INFO L124 PetriNetUnfolderBase]: 3464/5340 cut-off events. [2024-06-20 16:15:13,510 INFO L125 PetriNetUnfolderBase]: For 1483654/1483658 co-relation queries the response was YES. [2024-06-20 16:15:13,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65439 conditions, 5340 events. 3464/5340 cut-off events. For 1483654/1483658 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 30106 event pairs, 636 based on Foata normal form. 2/5341 useless extension candidates. Maximal degree in co-relation 65251. Up to 4720 conditions per place. [2024-06-20 16:15:13,596 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 507 selfloop transitions, 92 changer transitions 0/603 dead transitions. [2024-06-20 16:15:13,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 603 transitions, 9549 flow [2024-06-20 16:15:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:15:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:15:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:15:13,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 16:15:13,597 INFO L175 Difference]: Start difference. First operand has 388 places, 569 transitions, 8073 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:15:13,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 603 transitions, 9549 flow [2024-06-20 16:15:19,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 603 transitions, 9338 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:15:19,109 INFO L231 Difference]: Finished difference. Result has 390 places, 577 transitions, 8245 flow [2024-06-20 16:15:19,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7870, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8245, PETRI_PLACES=390, PETRI_TRANSITIONS=577} [2024-06-20 16:15:19,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-20 16:15:19,110 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 577 transitions, 8245 flow [2024-06-20 16:15:19,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:19,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:19,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:19,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:15:19,111 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:19,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:19,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1906366298, now seen corresponding path program 4 times [2024-06-20 16:15:19,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:19,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772617193] [2024-06-20 16:15:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:19,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:19,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:19,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772617193] [2024-06-20 16:15:19,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772617193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:19,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:19,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:15:19,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598531665] [2024-06-20 16:15:19,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:19,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:15:19,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:19,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:15:19,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:15:19,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:15:19,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 577 transitions, 8245 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:19,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:19,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:15:19,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:21,378 INFO L124 PetriNetUnfolderBase]: 3474/5358 cut-off events. [2024-06-20 16:15:21,378 INFO L125 PetriNetUnfolderBase]: For 1507863/1507867 co-relation queries the response was YES. [2024-06-20 16:15:21,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66107 conditions, 5358 events. 3474/5358 cut-off events. For 1507863/1507867 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 30199 event pairs, 636 based on Foata normal form. 2/5359 useless extension candidates. Maximal degree in co-relation 65917. Up to 4686 conditions per place. [2024-06-20 16:15:21,468 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 497 selfloop transitions, 102 changer transitions 0/603 dead transitions. [2024-06-20 16:15:21,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 603 transitions, 9649 flow [2024-06-20 16:15:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:15:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:15:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:15:21,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 16:15:21,470 INFO L175 Difference]: Start difference. First operand has 390 places, 577 transitions, 8245 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:15:21,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 603 transitions, 9649 flow [2024-06-20 16:15:26,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 603 transitions, 9463 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-20 16:15:27,002 INFO L231 Difference]: Finished difference. Result has 394 places, 580 transitions, 8378 flow [2024-06-20 16:15:27,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8059, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8378, PETRI_PLACES=394, PETRI_TRANSITIONS=580} [2024-06-20 16:15:27,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-20 16:15:27,003 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 580 transitions, 8378 flow [2024-06-20 16:15:27,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:27,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:27,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:27,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:15:27,003 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:27,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1895996230, now seen corresponding path program 1 times [2024-06-20 16:15:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:27,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26973174] [2024-06-20 16:15:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:27,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:28,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:28,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26973174] [2024-06-20 16:15:28,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26973174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:28,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:28,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:15:28,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189478272] [2024-06-20 16:15:28,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:28,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:15:28,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:15:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:15:28,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:15:28,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 580 transitions, 8378 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:28,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:28,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:15:28,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:29,692 INFO L124 PetriNetUnfolderBase]: 3494/5360 cut-off events. [2024-06-20 16:15:29,692 INFO L125 PetriNetUnfolderBase]: For 1549036/1549040 co-relation queries the response was YES. [2024-06-20 16:15:29,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66636 conditions, 5360 events. 3494/5360 cut-off events. For 1549036/1549040 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 29980 event pairs, 635 based on Foata normal form. 4/5363 useless extension candidates. Maximal degree in co-relation 66445. Up to 4734 conditions per place. [2024-06-20 16:15:29,789 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 509 selfloop transitions, 99 changer transitions 0/612 dead transitions. [2024-06-20 16:15:29,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 612 transitions, 9860 flow [2024-06-20 16:15:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:15:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:15:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:15:29,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:15:29,791 INFO L175 Difference]: Start difference. First operand has 394 places, 580 transitions, 8378 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:15:29,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 612 transitions, 9860 flow [2024-06-20 16:15:35,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 612 transitions, 9577 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 16:15:35,915 INFO L231 Difference]: Finished difference. Result has 397 places, 584 transitions, 8452 flow [2024-06-20 16:15:35,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8095, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8452, PETRI_PLACES=397, PETRI_TRANSITIONS=584} [2024-06-20 16:15:35,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-20 16:15:35,916 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 584 transitions, 8452 flow [2024-06-20 16:15:35,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:35,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:35,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:35,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:15:35,917 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:35,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1895846283, now seen corresponding path program 1 times [2024-06-20 16:15:35,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:35,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661269396] [2024-06-20 16:15:35,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:35,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:37,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661269396] [2024-06-20 16:15:37,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661269396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:37,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:37,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:15:37,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432220382] [2024-06-20 16:15:37,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:37,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:15:37,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:37,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:15:37,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:15:37,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:15:37,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 584 transitions, 8452 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:37,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:37,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:15:37,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:38,623 INFO L124 PetriNetUnfolderBase]: 3569/5484 cut-off events. [2024-06-20 16:15:38,624 INFO L125 PetriNetUnfolderBase]: For 1588705/1588711 co-relation queries the response was YES. [2024-06-20 16:15:38,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68477 conditions, 5484 events. 3569/5484 cut-off events. For 1588705/1588711 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 30861 event pairs, 578 based on Foata normal form. 10/5493 useless extension candidates. Maximal degree in co-relation 68285. Up to 5130 conditions per place. [2024-06-20 16:15:38,721 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 573 selfloop transitions, 56 changer transitions 0/633 dead transitions. [2024-06-20 16:15:38,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 633 transitions, 10399 flow [2024-06-20 16:15:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:15:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:15:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-20 16:15:38,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3829268292682927 [2024-06-20 16:15:38,722 INFO L175 Difference]: Start difference. First operand has 397 places, 584 transitions, 8452 flow. Second operand 10 states and 157 transitions. [2024-06-20 16:15:38,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 633 transitions, 10399 flow [2024-06-20 16:15:44,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 633 transitions, 10048 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-20 16:15:44,298 INFO L231 Difference]: Finished difference. Result has 406 places, 612 transitions, 8910 flow [2024-06-20 16:15:44,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8123, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8910, PETRI_PLACES=406, PETRI_TRANSITIONS=612} [2024-06-20 16:15:44,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-20 16:15:44,299 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 612 transitions, 8910 flow [2024-06-20 16:15:44,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:44,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:44,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:44,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:15:44,300 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:44,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1895846500, now seen corresponding path program 2 times [2024-06-20 16:15:44,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:44,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147226820] [2024-06-20 16:15:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:45,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147226820] [2024-06-20 16:15:45,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147226820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:45,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:45,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:15:45,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230561459] [2024-06-20 16:15:45,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:45,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:15:45,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:45,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:15:45,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:15:45,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:15:45,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 612 transitions, 8910 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:45,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:45,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:15:45,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:46,955 INFO L124 PetriNetUnfolderBase]: 3589/5517 cut-off events. [2024-06-20 16:15:46,955 INFO L125 PetriNetUnfolderBase]: For 1600431/1600437 co-relation queries the response was YES. [2024-06-20 16:15:47,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68806 conditions, 5517 events. 3589/5517 cut-off events. For 1600431/1600437 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31037 event pairs, 574 based on Foata normal form. 8/5524 useless extension candidates. Maximal degree in co-relation 68607. Up to 5142 conditions per place. [2024-06-20 16:15:47,055 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 571 selfloop transitions, 63 changer transitions 0/638 dead transitions. [2024-06-20 16:15:47,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 638 transitions, 10410 flow [2024-06-20 16:15:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:15:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:15:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:15:47,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 16:15:47,057 INFO L175 Difference]: Start difference. First operand has 406 places, 612 transitions, 8910 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:15:47,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 638 transitions, 10410 flow [2024-06-20 16:15:51,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 638 transitions, 10216 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-20 16:15:51,878 INFO L231 Difference]: Finished difference. Result has 412 places, 616 transitions, 9010 flow [2024-06-20 16:15:51,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8716, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9010, PETRI_PLACES=412, PETRI_TRANSITIONS=616} [2024-06-20 16:15:51,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-20 16:15:51,879 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 616 transitions, 9010 flow [2024-06-20 16:15:51,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:51,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:51,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:51,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:15:51,880 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:51,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:51,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1018137766, now seen corresponding path program 3 times [2024-06-20 16:15:51,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:51,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591909508] [2024-06-20 16:15:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:51,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:52,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:52,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591909508] [2024-06-20 16:15:52,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591909508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:52,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:52,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:15:52,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098080978] [2024-06-20 16:15:52,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:52,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:15:52,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:52,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:15:52,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:15:53,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:15:53,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 616 transitions, 9010 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:53,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:53,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:15:53,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:54,613 INFO L124 PetriNetUnfolderBase]: 3609/5541 cut-off events. [2024-06-20 16:15:54,613 INFO L125 PetriNetUnfolderBase]: For 1631529/1631533 co-relation queries the response was YES. [2024-06-20 16:15:54,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69785 conditions, 5541 events. 3609/5541 cut-off events. For 1631529/1631533 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 31099 event pairs, 596 based on Foata normal form. 4/5544 useless extension candidates. Maximal degree in co-relation 69584. Up to 4815 conditions per place. [2024-06-20 16:15:54,720 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 518 selfloop transitions, 122 changer transitions 0/644 dead transitions. [2024-06-20 16:15:54,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 644 transitions, 10566 flow [2024-06-20 16:15:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:15:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:15:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:15:54,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:15:54,721 INFO L175 Difference]: Start difference. First operand has 412 places, 616 transitions, 9010 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:15:54,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 644 transitions, 10566 flow [2024-06-20 16:16:00,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 644 transitions, 10302 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-20 16:16:00,258 INFO L231 Difference]: Finished difference. Result has 414 places, 620 transitions, 9165 flow [2024-06-20 16:16:00,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8746, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9165, PETRI_PLACES=414, PETRI_TRANSITIONS=620} [2024-06-20 16:16:00,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-20 16:16:00,259 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 620 transitions, 9165 flow [2024-06-20 16:16:00,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:00,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:00,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:00,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:16:00,259 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:00,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1910085368, now seen corresponding path program 5 times [2024-06-20 16:16:00,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:00,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639618838] [2024-06-20 16:16:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:00,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:01,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:01,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639618838] [2024-06-20 16:16:01,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639618838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:01,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:01,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:16:01,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697761594] [2024-06-20 16:16:01,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:01,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:16:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:16:01,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:16:01,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:16:01,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 620 transitions, 9165 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:01,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:01,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:16:01,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:02,681 INFO L124 PetriNetUnfolderBase]: 3635/5582 cut-off events. [2024-06-20 16:16:02,681 INFO L125 PetriNetUnfolderBase]: For 1660906/1660910 co-relation queries the response was YES. [2024-06-20 16:16:02,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71168 conditions, 5582 events. 3635/5582 cut-off events. For 1660906/1660910 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 31416 event pairs, 640 based on Foata normal form. 2/5583 useless extension candidates. Maximal degree in co-relation 70966. Up to 4679 conditions per place. [2024-06-20 16:16:02,958 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 493 selfloop transitions, 150 changer transitions 0/647 dead transitions. [2024-06-20 16:16:02,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 647 transitions, 11301 flow [2024-06-20 16:16:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:16:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:16:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:16:02,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:16:02,960 INFO L175 Difference]: Start difference. First operand has 414 places, 620 transitions, 9165 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:16:02,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 647 transitions, 11301 flow [2024-06-20 16:16:09,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 647 transitions, 10910 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-20 16:16:09,920 INFO L231 Difference]: Finished difference. Result has 415 places, 626 transitions, 9298 flow [2024-06-20 16:16:09,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8774, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9298, PETRI_PLACES=415, PETRI_TRANSITIONS=626} [2024-06-20 16:16:09,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-20 16:16:09,921 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 626 transitions, 9298 flow [2024-06-20 16:16:09,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:09,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:09,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:09,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:16:09,921 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:09,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1580520496, now seen corresponding path program 6 times [2024-06-20 16:16:09,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:09,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181106520] [2024-06-20 16:16:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:09,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:10,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:10,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181106520] [2024-06-20 16:16:10,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181106520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:10,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:10,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:16:10,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087031684] [2024-06-20 16:16:10,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:10,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:16:10,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:10,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:16:10,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:16:10,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:16:10,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 626 transitions, 9298 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:10,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:10,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:16:10,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:12,447 INFO L124 PetriNetUnfolderBase]: 3629/5583 cut-off events. [2024-06-20 16:16:12,447 INFO L125 PetriNetUnfolderBase]: For 1663033/1663037 co-relation queries the response was YES. [2024-06-20 16:16:12,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70726 conditions, 5583 events. 3629/5583 cut-off events. For 1663033/1663037 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 31522 event pairs, 634 based on Foata normal form. 2/5584 useless extension candidates. Maximal degree in co-relation 70523. Up to 4674 conditions per place. [2024-06-20 16:16:12,546 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 487 selfloop transitions, 156 changer transitions 0/647 dead transitions. [2024-06-20 16:16:12,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 647 transitions, 11222 flow [2024-06-20 16:16:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:16:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:16:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:16:12,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:16:12,547 INFO L175 Difference]: Start difference. First operand has 415 places, 626 transitions, 9298 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:16:12,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 647 transitions, 11222 flow [2024-06-20 16:16:19,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 647 transitions, 10868 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-20 16:16:19,765 INFO L231 Difference]: Finished difference. Result has 419 places, 626 transitions, 9262 flow [2024-06-20 16:16:19,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9262, PETRI_PLACES=419, PETRI_TRANSITIONS=626} [2024-06-20 16:16:19,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-20 16:16:19,766 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 626 transitions, 9262 flow [2024-06-20 16:16:19,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:19,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:19,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:19,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 16:16:19,766 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:19,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:19,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1181414502, now seen corresponding path program 4 times [2024-06-20 16:16:19,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:19,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669659850] [2024-06-20 16:16:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:19,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:20,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:20,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669659850] [2024-06-20 16:16:20,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669659850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:20,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:20,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:16:20,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039016346] [2024-06-20 16:16:20,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:20,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:16:20,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:20,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:16:20,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:16:20,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:16:20,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 626 transitions, 9262 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:20,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:20,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:16:20,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:22,561 INFO L124 PetriNetUnfolderBase]: 3681/5651 cut-off events. [2024-06-20 16:16:22,561 INFO L125 PetriNetUnfolderBase]: For 1746069/1746075 co-relation queries the response was YES. [2024-06-20 16:16:22,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72440 conditions, 5651 events. 3681/5651 cut-off events. For 1746069/1746075 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 31899 event pairs, 589 based on Foata normal form. 8/5658 useless extension candidates. Maximal degree in co-relation 72236. Up to 5124 conditions per place. [2024-06-20 16:16:22,678 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 566 selfloop transitions, 84 changer transitions 0/654 dead transitions. [2024-06-20 16:16:22,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 654 transitions, 11248 flow [2024-06-20 16:16:22,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:16:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:16:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:16:22,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:16:22,679 INFO L175 Difference]: Start difference. First operand has 419 places, 626 transitions, 9262 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:16:22,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 654 transitions, 11248 flow [2024-06-20 16:16:28,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 654 transitions, 10655 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 16:16:28,889 INFO L231 Difference]: Finished difference. Result has 419 places, 633 transitions, 9126 flow [2024-06-20 16:16:28,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8669, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9126, PETRI_PLACES=419, PETRI_TRANSITIONS=633} [2024-06-20 16:16:28,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-20 16:16:28,890 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 633 transitions, 9126 flow [2024-06-20 16:16:28,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:28,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:28,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:28,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 16:16:28,890 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:28,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:28,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1188771732, now seen corresponding path program 5 times [2024-06-20 16:16:28,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:28,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839448314] [2024-06-20 16:16:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:28,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:29,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:29,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839448314] [2024-06-20 16:16:29,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839448314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:29,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:29,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:16:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824763090] [2024-06-20 16:16:29,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:29,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:16:29,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:29,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:16:29,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:16:30,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:16:30,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 633 transitions, 9126 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:30,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:30,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:16:30,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:31,659 INFO L124 PetriNetUnfolderBase]: 3701/5683 cut-off events. [2024-06-20 16:16:31,659 INFO L125 PetriNetUnfolderBase]: For 1778492/1778496 co-relation queries the response was YES. [2024-06-20 16:16:31,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72523 conditions, 5683 events. 3701/5683 cut-off events. For 1778492/1778496 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 32016 event pairs, 636 based on Foata normal form. 4/5686 useless extension candidates. Maximal degree in co-relation 72320. Up to 4758 conditions per place. [2024-06-20 16:16:31,765 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 503 selfloop transitions, 151 changer transitions 0/658 dead transitions. [2024-06-20 16:16:31,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 658 transitions, 10984 flow [2024-06-20 16:16:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:16:31,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:16:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:16:31,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:16:31,766 INFO L175 Difference]: Start difference. First operand has 419 places, 633 transitions, 9126 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:16:31,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 658 transitions, 10984 flow [2024-06-20 16:16:37,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 658 transitions, 10728 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-20 16:16:37,694 INFO L231 Difference]: Finished difference. Result has 423 places, 637 transitions, 9363 flow [2024-06-20 16:16:37,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8870, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9363, PETRI_PLACES=423, PETRI_TRANSITIONS=637} [2024-06-20 16:16:37,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-20 16:16:37,695 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 637 transitions, 9363 flow [2024-06-20 16:16:37,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:37,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:37,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:37,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 16:16:37,695 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:37,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1188766152, now seen corresponding path program 6 times [2024-06-20 16:16:37,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:37,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706775686] [2024-06-20 16:16:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:37,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:38,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:38,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706775686] [2024-06-20 16:16:38,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706775686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:38,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:38,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:16:38,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186326094] [2024-06-20 16:16:38,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:38,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:16:38,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:38,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:16:38,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:16:38,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:16:38,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 637 transitions, 9363 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:38,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:38,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:16:38,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:40,606 INFO L124 PetriNetUnfolderBase]: 3721/5699 cut-off events. [2024-06-20 16:16:40,607 INFO L125 PetriNetUnfolderBase]: For 1808940/1808946 co-relation queries the response was YES. [2024-06-20 16:16:40,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73718 conditions, 5699 events. 3721/5699 cut-off events. For 1808940/1808946 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32036 event pairs, 606 based on Foata normal form. 8/5706 useless extension candidates. Maximal degree in co-relation 73513. Up to 5290 conditions per place. [2024-06-20 16:16:40,702 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 591 selfloop transitions, 64 changer transitions 0/659 dead transitions. [2024-06-20 16:16:40,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 659 transitions, 10895 flow [2024-06-20 16:16:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:16:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:16:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 16:16:40,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:16:40,703 INFO L175 Difference]: Start difference. First operand has 423 places, 637 transitions, 9363 flow. Second operand 9 states and 144 transitions. [2024-06-20 16:16:40,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 659 transitions, 10895 flow [2024-06-20 16:16:47,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 659 transitions, 10430 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-20 16:16:47,083 INFO L231 Difference]: Finished difference. Result has 425 places, 641 transitions, 9199 flow [2024-06-20 16:16:47,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8898, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9199, PETRI_PLACES=425, PETRI_TRANSITIONS=641} [2024-06-20 16:16:47,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-20 16:16:47,084 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 641 transitions, 9199 flow [2024-06-20 16:16:47,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:47,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:47,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:47,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 16:16:47,084 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:47,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1188765935, now seen corresponding path program 2 times [2024-06-20 16:16:47,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:47,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455123671] [2024-06-20 16:16:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:47,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:48,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:48,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455123671] [2024-06-20 16:16:48,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455123671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:48,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:48,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:16:48,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030180715] [2024-06-20 16:16:48,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:48,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:16:48,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:48,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:16:48,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:16:48,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:16:48,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 641 transitions, 9199 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:48,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:48,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:16:48,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:49,952 INFO L124 PetriNetUnfolderBase]: 3731/5721 cut-off events. [2024-06-20 16:16:49,952 INFO L125 PetriNetUnfolderBase]: For 1811010/1811016 co-relation queries the response was YES. [2024-06-20 16:16:50,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73563 conditions, 5721 events. 3731/5721 cut-off events. For 1811010/1811016 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32315 event pairs, 592 based on Foata normal form. 6/5726 useless extension candidates. Maximal degree in co-relation 73357. Up to 5310 conditions per place. [2024-06-20 16:16:50,076 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 594 selfloop transitions, 64 changer transitions 0/662 dead transitions. [2024-06-20 16:16:50,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 662 transitions, 10699 flow [2024-06-20 16:16:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:16:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:16:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 16:16:50,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 16:16:50,078 INFO L175 Difference]: Start difference. First operand has 425 places, 641 transitions, 9199 flow. Second operand 9 states and 143 transitions. [2024-06-20 16:16:50,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 662 transitions, 10699 flow [2024-06-20 16:16:58,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 662 transitions, 10432 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-20 16:16:58,095 INFO L231 Difference]: Finished difference. Result has 427 places, 645 transitions, 9209 flow [2024-06-20 16:16:58,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8932, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9209, PETRI_PLACES=427, PETRI_TRANSITIONS=645} [2024-06-20 16:16:58,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-20 16:16:58,096 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 645 transitions, 9209 flow [2024-06-20 16:16:58,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:58,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:58,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:58,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 16:16:58,097 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:58,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:58,097 INFO L85 PathProgramCache]: Analyzing trace with hash -692384809, now seen corresponding path program 3 times [2024-06-20 16:16:58,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:58,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994010061] [2024-06-20 16:16:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:58,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:59,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:59,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994010061] [2024-06-20 16:16:59,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994010061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:59,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:59,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:16:59,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13040601] [2024-06-20 16:16:59,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:59,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:16:59,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:59,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:16:59,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:16:59,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:16:59,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 645 transitions, 9209 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:59,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:59,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:16:59,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:01,129 INFO L124 PetriNetUnfolderBase]: 3912/5988 cut-off events. [2024-06-20 16:17:01,130 INFO L125 PetriNetUnfolderBase]: For 1866435/1866441 co-relation queries the response was YES. [2024-06-20 16:17:01,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76653 conditions, 5988 events. 3912/5988 cut-off events. For 1866435/1866441 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33970 event pairs, 588 based on Foata normal form. 8/5995 useless extension candidates. Maximal degree in co-relation 76446. Up to 5464 conditions per place. [2024-06-20 16:17:01,247 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 630 selfloop transitions, 100 changer transitions 0/734 dead transitions. [2024-06-20 16:17:01,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 734 transitions, 12605 flow [2024-06-20 16:17:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:17:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:17:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-20 16:17:01,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-20 16:17:01,249 INFO L175 Difference]: Start difference. First operand has 427 places, 645 transitions, 9209 flow. Second operand 10 states and 159 transitions. [2024-06-20 16:17:01,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 734 transitions, 12605 flow [2024-06-20 16:17:09,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 734 transitions, 12255 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-20 16:17:09,924 INFO L231 Difference]: Finished difference. Result has 433 places, 700 transitions, 10364 flow [2024-06-20 16:17:09,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8992, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10364, PETRI_PLACES=433, PETRI_TRANSITIONS=700} [2024-06-20 16:17:09,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-20 16:17:09,925 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 700 transitions, 10364 flow [2024-06-20 16:17:09,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:09,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:09,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:09,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 16:17:09,925 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:09,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:09,926 INFO L85 PathProgramCache]: Analyzing trace with hash -692117899, now seen corresponding path program 4 times [2024-06-20 16:17:09,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:09,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924793306] [2024-06-20 16:17:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:09,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:11,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:11,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924793306] [2024-06-20 16:17:11,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924793306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:11,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:11,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:17:11,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367320053] [2024-06-20 16:17:11,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:11,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:17:11,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:17:11,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:17:11,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:17:11,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 700 transitions, 10364 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:11,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:11,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:17:11,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:13,129 INFO L124 PetriNetUnfolderBase]: 3916/5993 cut-off events. [2024-06-20 16:17:13,129 INFO L125 PetriNetUnfolderBase]: For 1893540/1893546 co-relation queries the response was YES. [2024-06-20 16:17:13,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76840 conditions, 5993 events. 3916/5993 cut-off events. For 1893540/1893546 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34089 event pairs, 592 based on Foata normal form. 8/6000 useless extension candidates. Maximal degree in co-relation 76629. Up to 5333 conditions per place. [2024-06-20 16:17:13,234 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 567 selfloop transitions, 153 changer transitions 0/724 dead transitions. [2024-06-20 16:17:13,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 724 transitions, 12318 flow [2024-06-20 16:17:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:17:13,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:17:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:17:13,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 16:17:13,235 INFO L175 Difference]: Start difference. First operand has 433 places, 700 transitions, 10364 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:17:13,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 724 transitions, 12318 flow [2024-06-20 16:17:20,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 724 transitions, 12074 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-20 16:17:20,371 INFO L231 Difference]: Finished difference. Result has 439 places, 706 transitions, 10694 flow [2024-06-20 16:17:20,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10120, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10694, PETRI_PLACES=439, PETRI_TRANSITIONS=706} [2024-06-20 16:17:20,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-20 16:17:20,371 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 706 transitions, 10694 flow [2024-06-20 16:17:20,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:20,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:20,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:20,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 16:17:20,372 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:20,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash 174481396, now seen corresponding path program 4 times [2024-06-20 16:17:20,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:20,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959667559] [2024-06-20 16:17:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:20,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:21,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:21,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959667559] [2024-06-20 16:17:21,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959667559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:21,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:21,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:17:21,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732768456] [2024-06-20 16:17:21,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:21,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:17:21,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:21,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:17:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:17:21,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:17:21,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 706 transitions, 10694 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:21,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:21,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:17:21,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:23,551 INFO L124 PetriNetUnfolderBase]: 3932/6017 cut-off events. [2024-06-20 16:17:23,551 INFO L125 PetriNetUnfolderBase]: For 1924672/1924678 co-relation queries the response was YES. [2024-06-20 16:17:23,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77917 conditions, 6017 events. 3932/6017 cut-off events. For 1924672/1924678 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 34249 event pairs, 594 based on Foata normal form. 8/6024 useless extension candidates. Maximal degree in co-relation 77703. Up to 5560 conditions per place. [2024-06-20 16:17:23,675 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 645 selfloop transitions, 78 changer transitions 0/727 dead transitions. [2024-06-20 16:17:23,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 727 transitions, 12368 flow [2024-06-20 16:17:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:17:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:17:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 16:17:23,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 16:17:23,676 INFO L175 Difference]: Start difference. First operand has 439 places, 706 transitions, 10694 flow. Second operand 9 states and 143 transitions. [2024-06-20 16:17:23,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 727 transitions, 12368 flow [2024-06-20 16:17:33,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 727 transitions, 12036 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 16:17:33,191 INFO L231 Difference]: Finished difference. Result has 442 places, 709 transitions, 10707 flow [2024-06-20 16:17:33,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10362, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10707, PETRI_PLACES=442, PETRI_TRANSITIONS=709} [2024-06-20 16:17:33,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-20 16:17:33,192 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 709 transitions, 10707 flow [2024-06-20 16:17:33,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:33,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:33,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:33,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 16:17:33,192 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:33,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1192588824, now seen corresponding path program 5 times [2024-06-20 16:17:33,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:33,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696286481] [2024-06-20 16:17:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:34,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:34,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696286481] [2024-06-20 16:17:34,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696286481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:34,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:34,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:17:34,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452581588] [2024-06-20 16:17:34,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:34,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:17:34,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:34,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:17:34,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:17:34,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:17:34,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 709 transitions, 10707 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:34,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:34,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:17:34,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:36,295 INFO L124 PetriNetUnfolderBase]: 3948/6041 cut-off events. [2024-06-20 16:17:36,295 INFO L125 PetriNetUnfolderBase]: For 1955718/1955724 co-relation queries the response was YES. [2024-06-20 16:17:36,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78430 conditions, 6041 events. 3948/6041 cut-off events. For 1955718/1955724 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 34370 event pairs, 592 based on Foata normal form. 8/6048 useless extension candidates. Maximal degree in co-relation 78215. Up to 5580 conditions per place. [2024-06-20 16:17:36,401 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 653 selfloop transitions, 74 changer transitions 0/731 dead transitions. [2024-06-20 16:17:36,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 731 transitions, 12397 flow [2024-06-20 16:17:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:17:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:17:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 16:17:36,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 16:17:36,402 INFO L175 Difference]: Start difference. First operand has 442 places, 709 transitions, 10707 flow. Second operand 9 states and 143 transitions. [2024-06-20 16:17:36,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 731 transitions, 12397 flow [2024-06-20 16:17:45,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 731 transitions, 12076 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-20 16:17:45,779 INFO L231 Difference]: Finished difference. Result has 444 places, 712 transitions, 10728 flow [2024-06-20 16:17:45,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10386, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10728, PETRI_PLACES=444, PETRI_TRANSITIONS=712} [2024-06-20 16:17:45,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-20 16:17:45,780 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 712 transitions, 10728 flow [2024-06-20 16:17:45,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:45,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:45,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:45,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 16:17:45,781 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:45,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1181537634, now seen corresponding path program 6 times [2024-06-20 16:17:45,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:45,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743343889] [2024-06-20 16:17:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:45,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:46,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:46,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743343889] [2024-06-20 16:17:46,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743343889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:46,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:46,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:17:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576577530] [2024-06-20 16:17:46,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:46,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:17:46,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:46,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:17:46,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:17:46,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:17:46,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 712 transitions, 10728 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:46,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:46,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:17:46,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:48,768 INFO L124 PetriNetUnfolderBase]: 3964/6065 cut-off events. [2024-06-20 16:17:48,769 INFO L125 PetriNetUnfolderBase]: For 1983248/1983254 co-relation queries the response was YES. [2024-06-20 16:17:48,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78908 conditions, 6065 events. 3964/6065 cut-off events. For 1983248/1983254 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34530 event pairs, 596 based on Foata normal form. 8/6072 useless extension candidates. Maximal degree in co-relation 78692. Up to 5521 conditions per place. [2024-06-20 16:17:48,892 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 620 selfloop transitions, 109 changer transitions 0/733 dead transitions. [2024-06-20 16:17:48,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 733 transitions, 12426 flow [2024-06-20 16:17:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:17:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:17:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 16:17:48,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:17:48,893 INFO L175 Difference]: Start difference. First operand has 444 places, 712 transitions, 10728 flow. Second operand 9 states and 144 transitions. [2024-06-20 16:17:48,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 733 transitions, 12426 flow [2024-06-20 16:17:58,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 733 transitions, 12106 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-20 16:17:58,130 INFO L231 Difference]: Finished difference. Result has 446 places, 715 transitions, 10827 flow [2024-06-20 16:17:58,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10408, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10827, PETRI_PLACES=446, PETRI_TRANSITIONS=715} [2024-06-20 16:17:58,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-20 16:17:58,130 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 715 transitions, 10827 flow [2024-06-20 16:17:58,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:58,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:58,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:58,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 16:17:58,131 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:58,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1181150940, now seen corresponding path program 2 times [2024-06-20 16:17:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:58,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84329521] [2024-06-20 16:17:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:58,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:59,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:59,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84329521] [2024-06-20 16:17:59,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84329521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:59,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:59,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:17:59,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562027994] [2024-06-20 16:17:59,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:59,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:17:59,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:59,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:17:59,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:17:59,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:17:59,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 715 transitions, 10827 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:59,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:59,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:17:59,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:01,299 INFO L124 PetriNetUnfolderBase]: 3960/6061 cut-off events. [2024-06-20 16:18:01,300 INFO L125 PetriNetUnfolderBase]: For 1962919/1962925 co-relation queries the response was YES. [2024-06-20 16:18:01,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78677 conditions, 6061 events. 3960/6061 cut-off events. For 1962919/1962925 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34515 event pairs, 596 based on Foata normal form. 6/6066 useless extension candidates. Maximal degree in co-relation 78460. Up to 5297 conditions per place. [2024-06-20 16:18:01,405 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 569 selfloop transitions, 160 changer transitions 0/733 dead transitions. [2024-06-20 16:18:01,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 733 transitions, 12625 flow [2024-06-20 16:18:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:18:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:18:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:18:01,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:18:01,407 INFO L175 Difference]: Start difference. First operand has 446 places, 715 transitions, 10827 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:18:01,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 733 transitions, 12625 flow [2024-06-20 16:18:10,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 733 transitions, 12136 flow, removed 138 selfloop flow, removed 7 redundant places. [2024-06-20 16:18:10,442 INFO L231 Difference]: Finished difference. Result has 448 places, 715 transitions, 10680 flow [2024-06-20 16:18:10,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10338, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10680, PETRI_PLACES=448, PETRI_TRANSITIONS=715} [2024-06-20 16:18:10,445 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-20 16:18:10,445 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 715 transitions, 10680 flow [2024-06-20 16:18:10,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:10,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:10,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:10,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 16:18:10,446 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:18:10,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:10,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1181137455, now seen corresponding path program 1 times [2024-06-20 16:18:10,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:10,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349296526] [2024-06-20 16:18:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:10,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:11,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:11,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349296526] [2024-06-20 16:18:11,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349296526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:11,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:11,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:18:11,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778159140] [2024-06-20 16:18:11,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:11,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:18:11,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:11,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:18:11,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:18:11,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:18:11,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 715 transitions, 10680 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:11,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:11,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:18:11,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:13,803 INFO L124 PetriNetUnfolderBase]: 3968/6082 cut-off events. [2024-06-20 16:18:13,803 INFO L125 PetriNetUnfolderBase]: For 1987124/1987132 co-relation queries the response was YES. [2024-06-20 16:18:13,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78862 conditions, 6082 events. 3968/6082 cut-off events. For 1987124/1987132 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 34686 event pairs, 597 based on Foata normal form. 10/6091 useless extension candidates. Maximal degree in co-relation 78644. Up to 5830 conditions per place. [2024-06-20 16:18:13,922 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 702 selfloop transitions, 31 changer transitions 0/737 dead transitions. [2024-06-20 16:18:13,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 737 transitions, 12376 flow [2024-06-20 16:18:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:18:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:18:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-20 16:18:13,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35853658536585364 [2024-06-20 16:18:13,923 INFO L175 Difference]: Start difference. First operand has 448 places, 715 transitions, 10680 flow. Second operand 10 states and 147 transitions. [2024-06-20 16:18:13,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 737 transitions, 12376 flow [2024-06-20 16:18:22,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 737 transitions, 12042 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 16:18:22,197 INFO L231 Difference]: Finished difference. Result has 450 places, 717 transitions, 10583 flow [2024-06-20 16:18:22,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10346, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10583, PETRI_PLACES=450, PETRI_TRANSITIONS=717} [2024-06-20 16:18:22,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-20 16:18:22,199 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 717 transitions, 10583 flow [2024-06-20 16:18:22,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:22,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:22,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:22,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 16:18:22,199 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:18:22,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:22,200 INFO L85 PathProgramCache]: Analyzing trace with hash 966135187, now seen corresponding path program 2 times [2024-06-20 16:18:22,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:22,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970216422] [2024-06-20 16:18:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:22,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:23,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:23,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970216422] [2024-06-20 16:18:23,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970216422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:23,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:23,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:18:23,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895781424] [2024-06-20 16:18:23,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:23,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:18:23,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:23,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:18:23,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:18:23,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:18:23,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 717 transitions, 10583 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:23,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:23,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:18:23,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:25,234 INFO L124 PetriNetUnfolderBase]: 3973/6062 cut-off events. [2024-06-20 16:18:25,234 INFO L125 PetriNetUnfolderBase]: For 1979026/1979028 co-relation queries the response was YES. [2024-06-20 16:18:25,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78496 conditions, 6062 events. 3973/6062 cut-off events. For 1979026/1979028 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34353 event pairs, 624 based on Foata normal form. 1/6056 useless extension candidates. Maximal degree in co-relation 78278. Up to 5403 conditions per place. [2024-06-20 16:18:25,342 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 629 selfloop transitions, 109 changer transitions 0/742 dead transitions. [2024-06-20 16:18:25,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 742 transitions, 12253 flow [2024-06-20 16:18:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:18:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:18:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:18:25,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:18:25,344 INFO L175 Difference]: Start difference. First operand has 450 places, 717 transitions, 10583 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:18:25,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 742 transitions, 12253 flow [2024-06-20 16:18:33,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 742 transitions, 12022 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-20 16:18:33,012 INFO L231 Difference]: Finished difference. Result has 450 places, 720 transitions, 10688 flow [2024-06-20 16:18:33,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10352, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10688, PETRI_PLACES=450, PETRI_TRANSITIONS=720} [2024-06-20 16:18:33,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-20 16:18:33,012 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 720 transitions, 10688 flow [2024-06-20 16:18:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:33,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:33,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:33,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 16:18:33,013 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:18:33,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2004771925, now seen corresponding path program 3 times [2024-06-20 16:18:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:33,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481900180] [2024-06-20 16:18:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:33,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:33,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481900180] [2024-06-20 16:18:33,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481900180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:33,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:33,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:18:33,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120857877] [2024-06-20 16:18:33,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:33,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:18:33,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:33,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:18:33,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:18:33,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:18:33,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 720 transitions, 10688 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:33,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:33,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:18:33,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:35,826 INFO L124 PetriNetUnfolderBase]: 3970/6052 cut-off events. [2024-06-20 16:18:35,826 INFO L125 PetriNetUnfolderBase]: For 1988684/1988690 co-relation queries the response was YES. [2024-06-20 16:18:35,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78526 conditions, 6052 events. 3970/6052 cut-off events. For 1988684/1988690 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34238 event pairs, 612 based on Foata normal form. 2/6044 useless extension candidates. Maximal degree in co-relation 78307. Up to 5399 conditions per place. [2024-06-20 16:18:35,944 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 627 selfloop transitions, 112 changer transitions 0/743 dead transitions. [2024-06-20 16:18:35,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 743 transitions, 12264 flow [2024-06-20 16:18:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:18:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:18:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:18:35,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 16:18:35,945 INFO L175 Difference]: Start difference. First operand has 450 places, 720 transitions, 10688 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:18:35,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 743 transitions, 12264 flow [2024-06-20 16:18:45,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 743 transitions, 11926 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-20 16:18:45,385 INFO L231 Difference]: Finished difference. Result has 452 places, 720 transitions, 10586 flow [2024-06-20 16:18:45,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10350, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10586, PETRI_PLACES=452, PETRI_TRANSITIONS=720} [2024-06-20 16:18:45,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 16:18:45,386 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 720 transitions, 10586 flow [2024-06-20 16:18:45,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:45,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:45,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:45,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 16:18:45,386 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:18:45,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:45,387 INFO L85 PathProgramCache]: Analyzing trace with hash -940488751, now seen corresponding path program 4 times [2024-06-20 16:18:45,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:45,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414317598] [2024-06-20 16:18:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:45,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:46,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:46,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414317598] [2024-06-20 16:18:46,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414317598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:46,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:46,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:18:46,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845802169] [2024-06-20 16:18:46,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:46,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:18:46,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:46,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:18:46,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:18:46,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:18:46,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 720 transitions, 10586 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:46,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:46,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:18:46,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:48,414 INFO L124 PetriNetUnfolderBase]: 3967/6046 cut-off events. [2024-06-20 16:18:48,414 INFO L125 PetriNetUnfolderBase]: For 2002114/2002120 co-relation queries the response was YES. [2024-06-20 16:18:48,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78430 conditions, 6046 events. 3967/6046 cut-off events. For 2002114/2002120 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34262 event pairs, 604 based on Foata normal form. 2/6038 useless extension candidates. Maximal degree in co-relation 78210. Up to 5328 conditions per place. [2024-06-20 16:18:48,518 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 601 selfloop transitions, 136 changer transitions 0/741 dead transitions. [2024-06-20 16:18:48,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 741 transitions, 12160 flow [2024-06-20 16:18:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:18:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:18:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:18:48,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 16:18:48,519 INFO L175 Difference]: Start difference. First operand has 452 places, 720 transitions, 10586 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:18:48,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 741 transitions, 12160 flow [2024-06-20 16:18:58,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 741 transitions, 11801 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 16:18:58,960 INFO L231 Difference]: Finished difference. Result has 452 places, 720 transitions, 10509 flow [2024-06-20 16:18:58,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10227, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10509, PETRI_PLACES=452, PETRI_TRANSITIONS=720} [2024-06-20 16:18:58,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 16:18:58,961 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 720 transitions, 10509 flow [2024-06-20 16:18:58,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:58,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:58,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:58,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 16:18:58,962 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:18:58,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash 316672206, now seen corresponding path program 7 times [2024-06-20 16:18:58,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:58,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231401337] [2024-06-20 16:18:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:58,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:59,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:59,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231401337] [2024-06-20 16:18:59,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231401337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:59,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:59,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:18:59,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033751779] [2024-06-20 16:18:59,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:59,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:18:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:18:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:18:59,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:18:59,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 720 transitions, 10509 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:59,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:59,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:18:59,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:01,781 INFO L124 PetriNetUnfolderBase]: 3977/6065 cut-off events. [2024-06-20 16:19:01,781 INFO L125 PetriNetUnfolderBase]: For 2042420/2042426 co-relation queries the response was YES. [2024-06-20 16:19:01,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78808 conditions, 6065 events. 3977/6065 cut-off events. For 2042420/2042426 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 34375 event pairs, 626 based on Foata normal form. 3/6058 useless extension candidates. Maximal degree in co-relation 78588. Up to 5406 conditions per place. [2024-06-20 16:19:01,899 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 633 selfloop transitions, 110 changer transitions 0/747 dead transitions. [2024-06-20 16:19:01,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 747 transitions, 12253 flow [2024-06-20 16:19:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:19:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:19:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:19:01,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-20 16:19:01,900 INFO L175 Difference]: Start difference. First operand has 452 places, 720 transitions, 10509 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:19:01,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 747 transitions, 12253 flow [2024-06-20 16:19:11,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 747 transitions, 11884 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:19:11,655 INFO L231 Difference]: Finished difference. Result has 452 places, 723 transitions, 10520 flow [2024-06-20 16:19:11,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10140, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10520, PETRI_PLACES=452, PETRI_TRANSITIONS=723} [2024-06-20 16:19:11,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 16:19:11,656 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 723 transitions, 10520 flow [2024-06-20 16:19:11,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:11,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:11,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:11,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 16:19:11,657 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:19:11,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:11,657 INFO L85 PathProgramCache]: Analyzing trace with hash 320396856, now seen corresponding path program 8 times [2024-06-20 16:19:11,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:11,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393246478] [2024-06-20 16:19:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:11,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:12,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:12,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393246478] [2024-06-20 16:19:12,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393246478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:12,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:12,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:19:12,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820037070] [2024-06-20 16:19:12,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:12,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:19:12,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:12,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:19:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:19:12,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:19:12,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 723 transitions, 10520 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:12,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:12,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:19:12,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:14,690 INFO L124 PetriNetUnfolderBase]: 3971/6072 cut-off events. [2024-06-20 16:19:14,690 INFO L125 PetriNetUnfolderBase]: For 2047959/2047965 co-relation queries the response was YES. [2024-06-20 16:19:14,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78706 conditions, 6072 events. 3971/6072 cut-off events. For 2047959/2047965 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34508 event pairs, 592 based on Foata normal form. 3/6071 useless extension candidates. Maximal degree in co-relation 78486. Up to 5717 conditions per place. [2024-06-20 16:19:14,799 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 690 selfloop transitions, 52 changer transitions 0/746 dead transitions. [2024-06-20 16:19:14,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 746 transitions, 12216 flow [2024-06-20 16:19:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:19:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:19:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 16:19:14,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-20 16:19:14,800 INFO L175 Difference]: Start difference. First operand has 452 places, 723 transitions, 10520 flow. Second operand 9 states and 141 transitions. [2024-06-20 16:19:14,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 746 transitions, 12216 flow [2024-06-20 16:19:24,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 746 transitions, 11858 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-20 16:19:24,653 INFO L231 Difference]: Finished difference. Result has 454 places, 726 transitions, 10414 flow [2024-06-20 16:19:24,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10414, PETRI_PLACES=454, PETRI_TRANSITIONS=726} [2024-06-20 16:19:24,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-20 16:19:24,654 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 726 transitions, 10414 flow [2024-06-20 16:19:24,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:24,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:24,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:24,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 16:19:24,655 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:19:24,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:24,655 INFO L85 PathProgramCache]: Analyzing trace with hash 320397073, now seen corresponding path program 5 times [2024-06-20 16:19:24,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:24,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39714475] [2024-06-20 16:19:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:24,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:25,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:25,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39714475] [2024-06-20 16:19:25,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39714475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:25,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:25,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:19:25,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217218386] [2024-06-20 16:19:25,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:25,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:19:25,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:19:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:19:25,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:19:25,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 726 transitions, 10414 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:25,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:25,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:19:25,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:27,546 INFO L124 PetriNetUnfolderBase]: 3971/6071 cut-off events. [2024-06-20 16:19:27,546 INFO L125 PetriNetUnfolderBase]: For 2059540/2059546 co-relation queries the response was YES. [2024-06-20 16:19:27,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78334 conditions, 6071 events. 3971/6071 cut-off events. For 2059540/2059546 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34541 event pairs, 592 based on Foata normal form. 3/6070 useless extension candidates. Maximal degree in co-relation 78113. Up to 5717 conditions per place. [2024-06-20 16:19:27,663 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 692 selfloop transitions, 54 changer transitions 0/750 dead transitions. [2024-06-20 16:19:27,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 750 transitions, 12145 flow [2024-06-20 16:19:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:19:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:19:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 16:19:27,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-20 16:19:27,664 INFO L175 Difference]: Start difference. First operand has 454 places, 726 transitions, 10414 flow. Second operand 9 states and 141 transitions. [2024-06-20 16:19:27,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 750 transitions, 12145 flow [2024-06-20 16:19:35,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 750 transitions, 11859 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-20 16:19:35,571 INFO L231 Difference]: Finished difference. Result has 456 places, 730 transitions, 10408 flow [2024-06-20 16:19:35,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10144, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10408, PETRI_PLACES=456, PETRI_TRANSITIONS=730} [2024-06-20 16:19:35,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-20 16:19:35,572 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 730 transitions, 10408 flow [2024-06-20 16:19:35,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:35,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:35,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:35,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 16:19:35,573 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:19:35,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:35,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1413094492, now seen corresponding path program 9 times [2024-06-20 16:19:35,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:35,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633926860] [2024-06-20 16:19:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:35,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:36,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:36,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633926860] [2024-06-20 16:19:36,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633926860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:36,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:36,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:19:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307175047] [2024-06-20 16:19:36,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:36,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:19:36,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:19:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:19:36,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:19:36,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 730 transitions, 10408 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:36,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:36,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:19:36,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:38,702 INFO L124 PetriNetUnfolderBase]: 3997/6093 cut-off events. [2024-06-20 16:19:38,702 INFO L125 PetriNetUnfolderBase]: For 2111708/2111714 co-relation queries the response was YES. [2024-06-20 16:19:38,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79210 conditions, 6093 events. 3997/6093 cut-off events. For 2111708/2111714 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 34499 event pairs, 630 based on Foata normal form. 3/6086 useless extension candidates. Maximal degree in co-relation 78988. Up to 5373 conditions per place. [2024-06-20 16:19:38,813 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 625 selfloop transitions, 130 changer transitions 0/759 dead transitions. [2024-06-20 16:19:38,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 759 transitions, 12646 flow [2024-06-20 16:19:38,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:19:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:19:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:19:38,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:19:38,814 INFO L175 Difference]: Start difference. First operand has 456 places, 730 transitions, 10408 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:19:38,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 759 transitions, 12646 flow [2024-06-20 16:19:49,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 759 transitions, 12436 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-20 16:19:49,357 INFO L231 Difference]: Finished difference. Result has 458 places, 736 transitions, 10782 flow [2024-06-20 16:19:49,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10198, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10782, PETRI_PLACES=458, PETRI_TRANSITIONS=736} [2024-06-20 16:19:49,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-20 16:19:49,358 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 736 transitions, 10782 flow [2024-06-20 16:19:49,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:49,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:49,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:49,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 16:19:49,358 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:19:49,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash -973866144, now seen corresponding path program 7 times [2024-06-20 16:19:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:49,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651261476] [2024-06-20 16:19:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:50,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:50,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651261476] [2024-06-20 16:19:50,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651261476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:50,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:50,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:19:50,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783933605] [2024-06-20 16:19:50,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:50,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:19:50,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:50,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:19:50,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:19:50,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:19:50,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 736 transitions, 10782 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:50,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:50,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:19:50,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:52,092 INFO L124 PetriNetUnfolderBase]: 3999/6122 cut-off events. [2024-06-20 16:19:52,092 INFO L125 PetriNetUnfolderBase]: For 2133092/2133102 co-relation queries the response was YES. [2024-06-20 16:19:52,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79829 conditions, 6122 events. 3999/6122 cut-off events. For 2133092/2133102 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 34860 event pairs, 670 based on Foata normal form. 7/6127 useless extension candidates. Maximal degree in co-relation 79606. Up to 5445 conditions per place. [2024-06-20 16:19:52,212 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 658 selfloop transitions, 103 changer transitions 0/765 dead transitions. [2024-06-20 16:19:52,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 765 transitions, 12563 flow [2024-06-20 16:19:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:19:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:19:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:19:52,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:19:52,213 INFO L175 Difference]: Start difference. First operand has 458 places, 736 transitions, 10782 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:19:52,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 765 transitions, 12563 flow [2024-06-20 16:20:02,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 765 transitions, 12252 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:02,402 INFO L231 Difference]: Finished difference. Result has 462 places, 744 transitions, 10877 flow [2024-06-20 16:20:02,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10475, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10877, PETRI_PLACES=462, PETRI_TRANSITIONS=744} [2024-06-20 16:20:02,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-20 16:20:02,406 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 744 transitions, 10877 flow [2024-06-20 16:20:02,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:02,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:02,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:02,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 16:20:02,407 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:02,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:02,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1874453008, now seen corresponding path program 10 times [2024-06-20 16:20:02,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:02,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800145931] [2024-06-20 16:20:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:02,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:03,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:03,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800145931] [2024-06-20 16:20:03,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800145931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:03,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:03,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:03,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818409292] [2024-06-20 16:20:03,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:03,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:03,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:03,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:03,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:03,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:20:03,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 744 transitions, 10877 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:03,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:03,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:20:03,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:05,387 INFO L124 PetriNetUnfolderBase]: 4001/6098 cut-off events. [2024-06-20 16:20:05,394 INFO L125 PetriNetUnfolderBase]: For 2145292/2145298 co-relation queries the response was YES. [2024-06-20 16:20:05,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80246 conditions, 6098 events. 4001/6098 cut-off events. For 2145292/2145298 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 34622 event pairs, 623 based on Foata normal form. 3/6091 useless extension candidates. Maximal degree in co-relation 80020. Up to 5440 conditions per place. [2024-06-20 16:20:05,505 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 648 selfloop transitions, 119 changer transitions 0/771 dead transitions. [2024-06-20 16:20:05,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 771 transitions, 12653 flow [2024-06-20 16:20:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:20:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:20:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 16:20:05,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-20 16:20:05,513 INFO L175 Difference]: Start difference. First operand has 462 places, 744 transitions, 10877 flow. Second operand 9 states and 150 transitions. [2024-06-20 16:20:05,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 771 transitions, 12653 flow [2024-06-20 16:20:15,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 771 transitions, 12446 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-20 16:20:15,303 INFO L231 Difference]: Finished difference. Result has 467 places, 747 transitions, 11058 flow [2024-06-20 16:20:15,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10670, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11058, PETRI_PLACES=467, PETRI_TRANSITIONS=747} [2024-06-20 16:20:15,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-20 16:20:15,303 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 747 transitions, 11058 flow [2024-06-20 16:20:15,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:15,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:15,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:15,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 16:20:15,304 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:15,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:15,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1208327108, now seen corresponding path program 8 times [2024-06-20 16:20:15,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:15,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602545014] [2024-06-20 16:20:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:15,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:16,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:16,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602545014] [2024-06-20 16:20:16,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602545014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:16,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:16,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:16,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745082560] [2024-06-20 16:20:16,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:16,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:16,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:16,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:16,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:20:16,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 747 transitions, 11058 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:16,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:16,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:20:16,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:18,028 INFO L124 PetriNetUnfolderBase]: 4003/6120 cut-off events. [2024-06-20 16:20:18,028 INFO L125 PetriNetUnfolderBase]: For 2161006/2161016 co-relation queries the response was YES. [2024-06-20 16:20:18,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80348 conditions, 6120 events. 4003/6120 cut-off events. For 2161006/2161016 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 34820 event pairs, 668 based on Foata normal form. 7/6125 useless extension candidates. Maximal degree in co-relation 80120. Up to 5435 conditions per place. [2024-06-20 16:20:18,151 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 657 selfloop transitions, 108 changer transitions 0/769 dead transitions. [2024-06-20 16:20:18,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 769 transitions, 12769 flow [2024-06-20 16:20:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:20:18,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:20:18,153 INFO L175 Difference]: Start difference. First operand has 467 places, 747 transitions, 11058 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:20:18,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 769 transitions, 12769 flow [2024-06-20 16:20:26,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 769 transitions, 12409 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-20 16:20:26,934 INFO L231 Difference]: Finished difference. Result has 468 places, 750 transitions, 11021 flow [2024-06-20 16:20:26,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10698, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11021, PETRI_PLACES=468, PETRI_TRANSITIONS=750} [2024-06-20 16:20:26,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-20 16:20:26,934 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 750 transitions, 11021 flow [2024-06-20 16:20:26,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:26,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:26,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:26,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 16:20:26,935 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:26,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:26,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1520190340, now seen corresponding path program 9 times [2024-06-20 16:20:26,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:26,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132784417] [2024-06-20 16:20:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:26,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:27,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:27,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132784417] [2024-06-20 16:20:27,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132784417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:27,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:27,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:27,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373050020] [2024-06-20 16:20:27,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:27,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:27,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:27,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:27,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:27,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:20:27,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 750 transitions, 11021 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:27,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:27,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:20:27,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:29,886 INFO L124 PetriNetUnfolderBase]: 4013/6139 cut-off events. [2024-06-20 16:20:29,886 INFO L125 PetriNetUnfolderBase]: For 2185675/2185685 co-relation queries the response was YES. [2024-06-20 16:20:29,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80446 conditions, 6139 events. 4013/6139 cut-off events. For 2185675/2185685 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 35028 event pairs, 660 based on Foata normal form. 7/6144 useless extension candidates. Maximal degree in co-relation 80217. Up to 5371 conditions per place. [2024-06-20 16:20:30,012 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 637 selfloop transitions, 129 changer transitions 0/770 dead transitions. [2024-06-20 16:20:30,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 770 transitions, 12727 flow [2024-06-20 16:20:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:20:30,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 16:20:30,013 INFO L175 Difference]: Start difference. First operand has 468 places, 750 transitions, 11021 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:20:30,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 770 transitions, 12727 flow [2024-06-20 16:20:39,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 770 transitions, 12441 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:20:39,161 INFO L231 Difference]: Finished difference. Result has 470 places, 753 transitions, 11089 flow [2024-06-20 16:20:39,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10735, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11089, PETRI_PLACES=470, PETRI_TRANSITIONS=753} [2024-06-20 16:20:39,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-20 16:20:39,162 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 753 transitions, 11089 flow [2024-06-20 16:20:39,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:39,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:39,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:39,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 16:20:39,162 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:39,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:39,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1520189968, now seen corresponding path program 11 times [2024-06-20 16:20:39,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:39,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390752097] [2024-06-20 16:20:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:39,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:40,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:40,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390752097] [2024-06-20 16:20:40,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390752097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:40,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:40,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:40,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324854069] [2024-06-20 16:20:40,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:40,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:40,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:40,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:40,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:40,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:20:40,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 753 transitions, 11089 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:40,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:40,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:20:40,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:42,142 INFO L124 PetriNetUnfolderBase]: 4023/6125 cut-off events. [2024-06-20 16:20:42,143 INFO L125 PetriNetUnfolderBase]: For 2214963/2214969 co-relation queries the response was YES. [2024-06-20 16:20:42,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80878 conditions, 6125 events. 4023/6125 cut-off events. For 2214963/2214969 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34691 event pairs, 614 based on Foata normal form. 3/6119 useless extension candidates. Maximal degree in co-relation 80648. Up to 5429 conditions per place. [2024-06-20 16:20:42,269 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 643 selfloop transitions, 131 changer transitions 0/778 dead transitions. [2024-06-20 16:20:42,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 778 transitions, 12907 flow [2024-06-20 16:20:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:20:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:20:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 16:20:42,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-20 16:20:42,271 INFO L175 Difference]: Start difference. First operand has 470 places, 753 transitions, 11089 flow. Second operand 9 states and 150 transitions. [2024-06-20 16:20:42,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 778 transitions, 12907 flow [2024-06-20 16:20:50,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 778 transitions, 12587 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:20:50,362 INFO L231 Difference]: Finished difference. Result has 473 places, 756 transitions, 11205 flow [2024-06-20 16:20:50,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10769, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11205, PETRI_PLACES=473, PETRI_TRANSITIONS=756} [2024-06-20 16:20:50,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 16:20:50,362 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 756 transitions, 11205 flow [2024-06-20 16:20:50,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:50,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:50,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:50,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 16:20:50,363 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:20:50,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash -853647986, now seen corresponding path program 12 times [2024-06-20 16:20:50,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:50,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757036979] [2024-06-20 16:20:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:50,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:51,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757036979] [2024-06-20 16:20:51,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757036979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:51,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:51,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:20:51,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215469203] [2024-06-20 16:20:51,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:51,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:20:51,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:20:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:20:51,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:20:51,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 756 transitions, 11205 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:51,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:51,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:20:51,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:53,620 INFO L124 PetriNetUnfolderBase]: 4033/6139 cut-off events. [2024-06-20 16:20:53,620 INFO L125 PetriNetUnfolderBase]: For 2247801/2247807 co-relation queries the response was YES. [2024-06-20 16:20:53,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81624 conditions, 6139 events. 4033/6139 cut-off events. For 2247801/2247807 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34771 event pairs, 619 based on Foata normal form. 3/6133 useless extension candidates. Maximal degree in co-relation 81393. Up to 5395 conditions per place. [2024-06-20 16:20:53,735 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 634 selfloop transitions, 146 changer transitions 0/784 dead transitions. [2024-06-20 16:20:53,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 784 transitions, 13095 flow [2024-06-20 16:20:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:20:53,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:20:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:20:53,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:20:53,737 INFO L175 Difference]: Start difference. First operand has 473 places, 756 transitions, 11205 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:20:53,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 784 transitions, 13095 flow [2024-06-20 16:21:03,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 784 transitions, 12681 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-20 16:21:03,738 INFO L231 Difference]: Finished difference. Result has 476 places, 762 transitions, 11342 flow [2024-06-20 16:21:03,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10791, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11342, PETRI_PLACES=476, PETRI_TRANSITIONS=762} [2024-06-20 16:21:03,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-20 16:21:03,738 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 762 transitions, 11342 flow [2024-06-20 16:21:03,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:03,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:03,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:03,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 16:21:03,739 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:03,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:03,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1581969492, now seen corresponding path program 13 times [2024-06-20 16:21:03,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:03,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955363551] [2024-06-20 16:21:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:03,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:04,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:04,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955363551] [2024-06-20 16:21:04,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955363551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:04,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:21:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706314391] [2024-06-20 16:21:04,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:04,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:21:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:21:04,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:21:04,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:21:04,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 762 transitions, 11342 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:04,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:04,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:21:04,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:06,831 INFO L124 PetriNetUnfolderBase]: 4059/6192 cut-off events. [2024-06-20 16:21:06,831 INFO L125 PetriNetUnfolderBase]: For 2310573/2310579 co-relation queries the response was YES. [2024-06-20 16:21:06,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83141 conditions, 6192 events. 4059/6192 cut-off events. For 2310573/2310579 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 35229 event pairs, 606 based on Foata normal form. 3/6191 useless extension candidates. Maximal degree in co-relation 82908. Up to 5752 conditions per place. [2024-06-20 16:21:06,959 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 693 selfloop transitions, 92 changer transitions 0/789 dead transitions. [2024-06-20 16:21:06,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 789 transitions, 13670 flow [2024-06-20 16:21:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:21:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:21:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:21:06,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 16:21:06,960 INFO L175 Difference]: Start difference. First operand has 476 places, 762 transitions, 11342 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:21:06,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 789 transitions, 13670 flow [2024-06-20 16:21:17,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 789 transitions, 13312 flow, removed 97 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:17,749 INFO L231 Difference]: Finished difference. Result has 481 places, 770 transitions, 11560 flow [2024-06-20 16:21:17,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10984, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11560, PETRI_PLACES=481, PETRI_TRANSITIONS=770} [2024-06-20 16:21:17,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-20 16:21:17,750 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 770 transitions, 11560 flow [2024-06-20 16:21:17,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:17,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:17,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:17,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 16:21:17,750 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:17,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:17,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1569463782, now seen corresponding path program 14 times [2024-06-20 16:21:17,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:17,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106438976] [2024-06-20 16:21:17,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:17,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:18,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:18,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106438976] [2024-06-20 16:21:18,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106438976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:18,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:18,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:21:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002227339] [2024-06-20 16:21:18,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:21:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:21:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:21:18,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:21:18,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 770 transitions, 11560 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:18,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:18,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:21:18,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:20,999 INFO L124 PetriNetUnfolderBase]: 4069/6212 cut-off events. [2024-06-20 16:21:20,999 INFO L125 PetriNetUnfolderBase]: For 2344035/2344041 co-relation queries the response was YES. [2024-06-20 16:21:21,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83845 conditions, 6212 events. 4069/6212 cut-off events. For 2344035/2344041 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35354 event pairs, 606 based on Foata normal form. 3/6211 useless extension candidates. Maximal degree in co-relation 83609. Up to 5762 conditions per place. [2024-06-20 16:21:21,137 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 698 selfloop transitions, 91 changer transitions 0/793 dead transitions. [2024-06-20 16:21:21,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 793 transitions, 13739 flow [2024-06-20 16:21:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:21:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:21:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 16:21:21,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 16:21:21,138 INFO L175 Difference]: Start difference. First operand has 481 places, 770 transitions, 11560 flow. Second operand 9 states and 147 transitions. [2024-06-20 16:21:21,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 793 transitions, 13739 flow [2024-06-20 16:21:34,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 793 transitions, 13398 flow, removed 120 selfloop flow, removed 5 redundant places. [2024-06-20 16:21:34,366 INFO L231 Difference]: Finished difference. Result has 485 places, 773 transitions, 11590 flow [2024-06-20 16:21:34,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11255, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11590, PETRI_PLACES=485, PETRI_TRANSITIONS=773} [2024-06-20 16:21:34,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-20 16:21:34,367 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 773 transitions, 11590 flow [2024-06-20 16:21:34,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:34,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:34,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:34,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 16:21:34,367 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:34,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:34,368 INFO L85 PathProgramCache]: Analyzing trace with hash -919464749, now seen corresponding path program 6 times [2024-06-20 16:21:34,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:34,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839508288] [2024-06-20 16:21:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:34,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:35,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:35,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839508288] [2024-06-20 16:21:35,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839508288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:35,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:35,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:21:35,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859250964] [2024-06-20 16:21:35,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:35,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:21:35,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:35,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:21:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:21:35,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:21:35,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 773 transitions, 11590 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:35,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:35,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:21:35,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:38,014 INFO L124 PetriNetUnfolderBase]: 4074/6230 cut-off events. [2024-06-20 16:21:38,014 INFO L125 PetriNetUnfolderBase]: For 2351564/2351566 co-relation queries the response was YES. [2024-06-20 16:21:38,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83963 conditions, 6230 events. 4074/6230 cut-off events. For 2351564/2351566 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 35628 event pairs, 692 based on Foata normal form. 1/6230 useless extension candidates. Maximal degree in co-relation 83725. Up to 6011 conditions per place. [2024-06-20 16:21:38,137 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 765 selfloop transitions, 21 changer transitions 0/790 dead transitions. [2024-06-20 16:21:38,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 790 transitions, 13307 flow [2024-06-20 16:21:38,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:21:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:21:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-20 16:21:38,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-20 16:21:38,138 INFO L175 Difference]: Start difference. First operand has 485 places, 773 transitions, 11590 flow. Second operand 9 states and 132 transitions. [2024-06-20 16:21:38,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 790 transitions, 13307 flow [2024-06-20 16:21:47,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 790 transitions, 13026 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-20 16:21:47,298 INFO L231 Difference]: Finished difference. Result has 488 places, 776 transitions, 11470 flow [2024-06-20 16:21:47,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11309, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11470, PETRI_PLACES=488, PETRI_TRANSITIONS=776} [2024-06-20 16:21:47,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-20 16:21:47,298 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 776 transitions, 11470 flow [2024-06-20 16:21:47,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:47,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:21:47,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:21:47,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 16:21:47,299 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:21:47,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:21:47,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1581975785, now seen corresponding path program 7 times [2024-06-20 16:21:47,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:21:47,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813790851] [2024-06-20 16:21:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:21:47,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:21:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:21:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:21:48,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:21:48,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813790851] [2024-06-20 16:21:48,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813790851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:21:48,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:21:48,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:21:48,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386264559] [2024-06-20 16:21:48,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:21:48,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:21:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:21:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:21:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:21:48,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:21:48,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 776 transitions, 11470 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:21:48,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:21:48,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:21:48,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:21:50,659 INFO L124 PetriNetUnfolderBase]: 4140/6308 cut-off events. [2024-06-20 16:21:50,659 INFO L125 PetriNetUnfolderBase]: For 2482192/2482194 co-relation queries the response was YES. [2024-06-20 16:21:50,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86249 conditions, 6308 events. 4140/6308 cut-off events. For 2482192/2482194 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35947 event pairs, 611 based on Foata normal form. 2/6307 useless extension candidates. Maximal degree in co-relation 86010. Up to 5845 conditions per place. [2024-06-20 16:21:50,794 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 702 selfloop transitions, 112 changer transitions 0/818 dead transitions. [2024-06-20 16:21:50,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 818 transitions, 14669 flow [2024-06-20 16:21:50,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:21:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:21:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:21:50,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:21:50,795 INFO L175 Difference]: Start difference. First operand has 488 places, 776 transitions, 11470 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:21:50,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 818 transitions, 14669 flow [2024-06-20 16:22:02,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 818 transitions, 14547 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 16:22:02,630 INFO L231 Difference]: Finished difference. Result has 492 places, 796 transitions, 12433 flow [2024-06-20 16:22:02,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11348, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12433, PETRI_PLACES=492, PETRI_TRANSITIONS=796} [2024-06-20 16:22:02,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-20 16:22:02,631 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 796 transitions, 12433 flow [2024-06-20 16:22:02,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:02,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:02,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:02,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 16:22:02,632 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:22:02,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash -932803398, now seen corresponding path program 10 times [2024-06-20 16:22:02,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:02,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139091042] [2024-06-20 16:22:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:02,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:03,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:03,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139091042] [2024-06-20 16:22:03,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139091042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:03,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:03,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:22:03,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127102515] [2024-06-20 16:22:03,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:03,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:22:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:22:03,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:22:03,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:22:03,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 796 transitions, 12433 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:03,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:03,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:22:03,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:05,970 INFO L124 PetriNetUnfolderBase]: 4166/6365 cut-off events. [2024-06-20 16:22:05,970 INFO L125 PetriNetUnfolderBase]: For 2542108/2542112 co-relation queries the response was YES. [2024-06-20 16:22:06,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87943 conditions, 6365 events. 4166/6365 cut-off events. For 2542108/2542112 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 36479 event pairs, 703 based on Foata normal form. 2/6365 useless extension candidates. Maximal degree in co-relation 87701. Up to 5250 conditions per place. [2024-06-20 16:22:06,119 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 601 selfloop transitions, 214 changer transitions 0/819 dead transitions. [2024-06-20 16:22:06,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 819 transitions, 15311 flow [2024-06-20 16:22:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:22:06,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 16:22:06,121 INFO L175 Difference]: Start difference. First operand has 492 places, 796 transitions, 12433 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:22:06,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 819 transitions, 15311 flow [2024-06-20 16:22:16,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 819 transitions, 14948 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:16,726 INFO L231 Difference]: Finished difference. Result has 495 places, 802 transitions, 12686 flow [2024-06-20 16:22:16,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12070, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12686, PETRI_PLACES=495, PETRI_TRANSITIONS=802} [2024-06-20 16:22:16,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-20 16:22:16,727 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 802 transitions, 12686 flow [2024-06-20 16:22:16,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:16,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:16,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:16,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 16:22:16,728 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:22:16,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2054252012, now seen corresponding path program 15 times [2024-06-20 16:22:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:16,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569619716] [2024-06-20 16:22:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:16,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:17,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:17,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569619716] [2024-06-20 16:22:17,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569619716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:17,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:17,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:22:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425269309] [2024-06-20 16:22:17,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:17,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:22:17,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:22:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:22:17,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:22:17,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 802 transitions, 12686 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:17,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:17,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:22:17,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:20,366 INFO L124 PetriNetUnfolderBase]: 4192/6366 cut-off events. [2024-06-20 16:22:20,366 INFO L125 PetriNetUnfolderBase]: For 2606327/2606329 co-relation queries the response was YES. [2024-06-20 16:22:20,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89472 conditions, 6366 events. 4192/6366 cut-off events. For 2606327/2606329 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36237 event pairs, 623 based on Foata normal form. 2/6361 useless extension candidates. Maximal degree in co-relation 89229. Up to 5513 conditions per place. [2024-06-20 16:22:20,488 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 647 selfloop transitions, 179 changer transitions 0/830 dead transitions. [2024-06-20 16:22:20,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 830 transitions, 15146 flow [2024-06-20 16:22:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:22:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:22:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:22:20,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:22:20,489 INFO L175 Difference]: Start difference. First operand has 495 places, 802 transitions, 12686 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:22:20,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 830 transitions, 15146 flow Killed by 15