./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:19:19,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:19:19,825 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:19:19,830 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:19:19,831 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:19:19,853 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:19:19,854 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:19:19,854 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:19:19,854 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:19:19,858 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:19:19,858 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:19:19,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:19:19,859 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:19:19,860 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:19:19,860 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:19:19,860 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:19:19,860 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:19:19,860 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:19:19,861 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:19:19,861 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:19:19,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:19:19,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:19:19,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:19:19,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:19:19,862 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:19:19,862 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:19:19,862 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:19:19,863 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:19:19,863 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:19:19,863 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:19:19,864 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:19:19,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:19:19,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:19:19,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:19:19,865 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:19:19,865 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:19:19,865 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:19:19,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:19:19,866 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:19:19,866 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:19:19,866 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:19:19,866 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:19:19,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:19:19,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:19:20,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:19:20,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:19:20,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:19:20,103 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:19:20,104 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:19:20,104 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 13:19:21,210 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:19:21,393 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:19:21,393 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 13:19:21,415 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2903d08e/fb26f739608041669a6abb43f29df6e2/FLAG899dd36ff [2024-06-14 13:19:21,425 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2903d08e/fb26f739608041669a6abb43f29df6e2 [2024-06-14 13:19:21,432 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:19:21,432 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:19:21,434 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-14 13:19:21,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:19:21,560 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:19:21,561 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:19:21,561 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:19:21,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:19:21,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:19:21" (1/2) ... [2024-06-14 13:19:21,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50090d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:19:21, skipping insertion in model container [2024-06-14 13:19:21,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:19:21" (1/2) ... [2024-06-14 13:19:21,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74000619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:19:21, skipping insertion in model container [2024-06-14 13:19:21,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:19:21" (2/2) ... [2024-06-14 13:19:21,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50090d8e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:21, skipping insertion in model container [2024-06-14 13:19:21,568 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:19:21" (2/2) ... [2024-06-14 13:19:21,568 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:19:21,641 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:19:21,642 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] (((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$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_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:19:21,643 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] (((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! 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$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:19:21,643 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] (((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$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_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:19:21,643 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:19:21,643 INFO L106 edCorrectnessWitness]: ghost_update [L814-L814] multithreaded = 1; [2024-06-14 13:19:21,694 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:19:22,045 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:19:22,056 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:19:22,165 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:19:22,205 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:19:22,205 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22 WrapperNode [2024-06-14 13:19:22,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:19:22,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:19:22,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:19:22,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:19:22,212 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 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,236 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 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,269 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 142 [2024-06-14 13:19:22,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:19:22,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:19:22,270 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:19:22,270 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:19:22,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,293 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,310 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]. [2024-06-14 13:19:22,314 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,315 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,323 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,331 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,333 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,339 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,341 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:19:22,343 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:19:22,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:19:22,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:19:22,344 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (1/1) ... [2024-06-14 13:19:22,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:19:22,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:19:22,377 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) [2024-06-14 13:19:22,397 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 [2024-06-14 13:19:22,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:19:22,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:19:22,409 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:19:22,409 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:19:22,409 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:19:22,410 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:19:22,410 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:19:22,410 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:19:22,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:19:22,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:19:22,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:19:22,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:19:22,412 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:19:22,541 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:19:22,542 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:19:22,841 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:19:22,841 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:19:22,993 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:19:22,993 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:19:22,994 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:19:22 BoogieIcfgContainer [2024-06-14 13:19:22,994 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:19:22,996 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:19:22,996 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:19:22,998 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:19:22,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:19:21" (1/4) ... [2024-06-14 13:19:22,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aeef40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:19:22, skipping insertion in model container [2024-06-14 13:19:22,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:19:21" (2/4) ... [2024-06-14 13:19:22,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aeef40f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:19:22, skipping insertion in model container [2024-06-14 13:19:22,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:19:22" (3/4) ... [2024-06-14 13:19:23,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aeef40f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:19:22, skipping insertion in model container [2024-06-14 13:19:23,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:19:22" (4/4) ... [2024-06-14 13:19:23,001 INFO L112 eAbstractionObserver]: Analyzing ICFG safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 13:19:23,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:19:23,013 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:19:23,014 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:19:23,055 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:19:23,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-14 13:19:23,108 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-14 13:19:23,109 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:19:23,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:19:23,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-14 13:19:23,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-14 13:19:23,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:19:23,132 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;@d5a60d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:19:23,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:19:23,138 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:19:23,138 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:19:23,138 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:19:23,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:23,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:19:23,140 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)] === [2024-06-14 13:19:23,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:23,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1507050491, now seen corresponding path program 1 times [2024-06-14 13:19:23,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:23,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371280333] [2024-06-14 13:19:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:23,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:24,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:24,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371280333] [2024-06-14 13:19:24,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371280333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:24,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:24,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:19:24,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351101988] [2024-06-14 13:19:24,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:24,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:19:24,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:19:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:19:24,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-14 13:19:24,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:24,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:24,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-14 13:19:24,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:24,516 INFO L124 PetriNetUnfolderBase]: 1156/1754 cut-off events. [2024-06-14 13:19:24,516 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-14 13:19:24,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3583 conditions, 1754 events. 1156/1754 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7866 event pairs, 805 based on Foata normal form. 1/1718 useless extension candidates. Maximal degree in co-relation 3568. Up to 1740 conditions per place. [2024-06-14 13:19:24,530 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 33 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-14 13:19:24,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 171 flow [2024-06-14 13:19:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:19:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:19:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-14 13:19:24,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-14 13:19:24,542 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 67 transitions. [2024-06-14 13:19:24,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 171 flow [2024-06-14 13:19:24,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:19:24,547 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-14 13:19:24,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-14 13:19:24,551 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-14 13:19:24,551 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-14 13:19:24,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:24,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:24,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:24,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:19:24,552 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)] === [2024-06-14 13:19:24,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:24,553 INFO L85 PathProgramCache]: Analyzing trace with hash -871499996, now seen corresponding path program 1 times [2024-06-14 13:19:24,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:24,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078974361] [2024-06-14 13:19:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:24,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:25,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:25,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078974361] [2024-06-14 13:19:25,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078974361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:25,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:25,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:19:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839811843] [2024-06-14 13:19:25,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:25,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:19:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:25,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:19:25,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:19:25,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-14 13:19:25,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:25,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:25,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-14 13:19:25,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:25,583 INFO L124 PetriNetUnfolderBase]: 1150/1745 cut-off events. [2024-06-14 13:19:25,583 INFO L125 PetriNetUnfolderBase]: For 338/346 co-relation queries the response was YES. [2024-06-14 13:19:25,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1745 events. 1150/1745 cut-off events. For 338/346 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7766 event pairs, 699 based on Foata normal form. 6/1749 useless extension candidates. Maximal degree in co-relation 4039. Up to 1716 conditions per place. [2024-06-14 13:19:25,590 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-14 13:19:25,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 238 flow [2024-06-14 13:19:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:19:25,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:19:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-14 13:19:25,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 13:19:25,592 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 86 transitions. [2024-06-14 13:19:25,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 238 flow [2024-06-14 13:19:25,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:19:25,594 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-14 13:19:25,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 13:19:25,594 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-14 13:19:25,595 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-14 13:19:25,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:25,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:25,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:25,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:19:25,595 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)] === [2024-06-14 13:19:25,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:25,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1246694692, now seen corresponding path program 1 times [2024-06-14 13:19:25,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:25,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31424369] [2024-06-14 13:19:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:25,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:26,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31424369] [2024-06-14 13:19:26,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31424369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:26,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:26,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:19:26,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965362240] [2024-06-14 13:19:26,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:26,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:19:26,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:19:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:19:26,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-14 13:19:26,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:26,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:26,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-14 13:19:26,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:26,480 INFO L124 PetriNetUnfolderBase]: 1405/2113 cut-off events. [2024-06-14 13:19:26,481 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-06-14 13:19:26,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5409 conditions, 2113 events. 1405/2113 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9500 event pairs, 627 based on Foata normal form. 7/2119 useless extension candidates. Maximal degree in co-relation 5392. Up to 1974 conditions per place. [2024-06-14 13:19:26,493 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-14 13:19:26,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 79 transitions, 423 flow [2024-06-14 13:19:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:19:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:19:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-14 13:19:26,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-14 13:19:26,498 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 111 transitions. [2024-06-14 13:19:26,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 79 transitions, 423 flow [2024-06-14 13:19:26,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 402 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:19:26,502 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 231 flow [2024-06-14 13:19:26,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2024-06-14 13:19:26,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-14 13:19:26,503 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 231 flow [2024-06-14 13:19:26,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:26,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:26,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:26,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:19:26,504 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)] === [2024-06-14 13:19:26,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:26,505 INFO L85 PathProgramCache]: Analyzing trace with hash 7171651, now seen corresponding path program 1 times [2024-06-14 13:19:26,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:26,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895790695] [2024-06-14 13:19:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:26,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:27,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:27,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895790695] [2024-06-14 13:19:27,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895790695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:27,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:27,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:19:27,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864802405] [2024-06-14 13:19:27,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:27,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:19:27,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:27,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:19:27,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:19:27,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-14 13:19:27,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:27,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:27,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-14 13:19:27,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:27,599 INFO L124 PetriNetUnfolderBase]: 1427/2146 cut-off events. [2024-06-14 13:19:27,599 INFO L125 PetriNetUnfolderBase]: For 2513/2515 co-relation queries the response was YES. [2024-06-14 13:19:27,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6651 conditions, 2146 events. 1427/2146 cut-off events. For 2513/2515 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9637 event pairs, 492 based on Foata normal form. 7/2152 useless extension candidates. Maximal degree in co-relation 6631. Up to 1917 conditions per place. [2024-06-14 13:19:27,611 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 73 selfloop transitions, 26 changer transitions 0/102 dead transitions. [2024-06-14 13:19:27,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 102 transitions, 627 flow [2024-06-14 13:19:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:19:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:19:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 13:19:27,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-14 13:19:27,613 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 231 flow. Second operand 6 states and 134 transitions. [2024-06-14 13:19:27,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 102 transitions, 627 flow [2024-06-14 13:19:27,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 102 transitions, 623 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 13:19:27,617 INFO L231 Difference]: Finished difference. Result has 58 places, 63 transitions, 392 flow [2024-06-14 13:19:27,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=58, PETRI_TRANSITIONS=63} [2024-06-14 13:19:27,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-14 13:19:27,618 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 63 transitions, 392 flow [2024-06-14 13:19:27,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:27,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:27,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:27,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:19:27,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:27,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1080602535, now seen corresponding path program 1 times [2024-06-14 13:19:27,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:27,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862565921] [2024-06-14 13:19:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:27,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:28,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:28,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862565921] [2024-06-14 13:19:28,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862565921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:28,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:28,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:19:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225880929] [2024-06-14 13:19:28,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:28,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:19:28,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:19:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:19:28,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-14 13:19:28,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 63 transitions, 392 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) [2024-06-14 13:19:28,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:28,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-14 13:19:28,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:28,815 INFO L124 PetriNetUnfolderBase]: 1544/2348 cut-off events. [2024-06-14 13:19:28,815 INFO L125 PetriNetUnfolderBase]: For 5169/5171 co-relation queries the response was YES. [2024-06-14 13:19:28,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8510 conditions, 2348 events. 1544/2348 cut-off events. For 5169/5171 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10918 event pairs, 360 based on Foata normal form. 32/2379 useless extension candidates. Maximal degree in co-relation 8484. Up to 1947 conditions per place. [2024-06-14 13:19:28,830 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 91 selfloop transitions, 20 changer transitions 0/114 dead transitions. [2024-06-14 13:19:28,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 114 transitions, 805 flow [2024-06-14 13:19:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 13:19:28,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 13:19:28,832 INFO L175 Difference]: Start difference. First operand has 58 places, 63 transitions, 392 flow. Second operand 7 states and 150 transitions. [2024-06-14 13:19:28,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 114 transitions, 805 flow [2024-06-14 13:19:28,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 114 transitions, 791 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-14 13:19:28,842 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 467 flow [2024-06-14 13:19:28,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-06-14 13:19:28,844 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-14 13:19:28,844 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 467 flow [2024-06-14 13:19:28,845 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) [2024-06-14 13:19:28,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:28,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:28,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:19:28,848 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)] === [2024-06-14 13:19:28,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash -674294270, now seen corresponding path program 1 times [2024-06-14 13:19:28,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:28,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163845084] [2024-06-14 13:19:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:28,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:29,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:29,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163845084] [2024-06-14 13:19:29,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163845084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:29,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:29,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:19:29,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371932173] [2024-06-14 13:19:29,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:29,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:19:29,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:19:29,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:19:29,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:29,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 467 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:29,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:29,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:29,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:29,882 INFO L124 PetriNetUnfolderBase]: 1534/2333 cut-off events. [2024-06-14 13:19:29,883 INFO L125 PetriNetUnfolderBase]: For 6510/6510 co-relation queries the response was YES. [2024-06-14 13:19:29,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9057 conditions, 2333 events. 1534/2333 cut-off events. For 6510/6510 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10788 event pairs, 549 based on Foata normal form. 4/2336 useless extension candidates. Maximal degree in co-relation 9027. Up to 2302 conditions per place. [2024-06-14 13:19:29,896 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 67 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-14 13:19:29,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 663 flow [2024-06-14 13:19:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:19:29,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:19:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-14 13:19:29,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-14 13:19:29,897 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 467 flow. Second operand 5 states and 82 transitions. [2024-06-14 13:19:29,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 663 flow [2024-06-14 13:19:29,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 625 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:29,903 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 479 flow [2024-06-14 13:19:29,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-14 13:19:29,904 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-14 13:19:29,904 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 479 flow [2024-06-14 13:19:29,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:29,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:29,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:29,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:19:29,905 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)] === [2024-06-14 13:19:29,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash -492888641, now seen corresponding path program 1 times [2024-06-14 13:19:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:29,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765948037] [2024-06-14 13:19:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:29,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:30,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765948037] [2024-06-14 13:19:30,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765948037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:30,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:30,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:19:30,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939402001] [2024-06-14 13:19:30,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:30,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:19:30,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:30,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:19:30,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:19:30,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:30,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:30,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:30,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:30,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:30,858 INFO L124 PetriNetUnfolderBase]: 1546/2352 cut-off events. [2024-06-14 13:19:30,858 INFO L125 PetriNetUnfolderBase]: For 7297/7299 co-relation queries the response was YES. [2024-06-14 13:19:30,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9208 conditions, 2352 events. 1546/2352 cut-off events. For 7297/7299 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10918 event pairs, 467 based on Foata normal form. 10/2361 useless extension candidates. Maximal degree in co-relation 9175. Up to 2200 conditions per place. [2024-06-14 13:19:30,878 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 74 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2024-06-14 13:19:30,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 777 flow [2024-06-14 13:19:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:19:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:19:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:19:30,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 13:19:30,880 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 479 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:19:30,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 777 flow [2024-06-14 13:19:30,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 755 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 13:19:30,888 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 549 flow [2024-06-14 13:19:30,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=549, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-14 13:19:30,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-14 13:19:30,889 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 549 flow [2024-06-14 13:19:30,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:30,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:30,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:30,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:19:30,890 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)] === [2024-06-14 13:19:30,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:30,890 INFO L85 PathProgramCache]: Analyzing trace with hash 544160869, now seen corresponding path program 2 times [2024-06-14 13:19:30,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:30,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855790858] [2024-06-14 13:19:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:30,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:31,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:31,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855790858] [2024-06-14 13:19:31,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855790858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:31,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:31,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:19:31,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874420717] [2024-06-14 13:19:31,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:31,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:19:31,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:31,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:19:31,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:19:31,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:31,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 549 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:31,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:31,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:31,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:31,872 INFO L124 PetriNetUnfolderBase]: 1504/2273 cut-off events. [2024-06-14 13:19:31,872 INFO L125 PetriNetUnfolderBase]: For 8612/8612 co-relation queries the response was YES. [2024-06-14 13:19:31,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9218 conditions, 2273 events. 1504/2273 cut-off events. For 8612/8612 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10251 event pairs, 505 based on Foata normal form. 4/2276 useless extension candidates. Maximal degree in co-relation 9183. Up to 2233 conditions per place. [2024-06-14 13:19:31,884 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 76 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-06-14 13:19:31,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 776 flow [2024-06-14 13:19:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:19:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:19:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 13:19:31,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:19:31,889 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 549 flow. Second operand 6 states and 96 transitions. [2024-06-14 13:19:31,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 776 flow [2024-06-14 13:19:31,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 753 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 13:19:31,898 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 569 flow [2024-06-14 13:19:31,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=569, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-14 13:19:31,899 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-14 13:19:31,899 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 569 flow [2024-06-14 13:19:31,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:31,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:31,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:31,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:19:31,900 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)] === [2024-06-14 13:19:31,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash -487166785, now seen corresponding path program 1 times [2024-06-14 13:19:31,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:31,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382229678] [2024-06-14 13:19:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:31,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:32,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:32,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382229678] [2024-06-14 13:19:32,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382229678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:32,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:32,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:32,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227227143] [2024-06-14 13:19:32,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:32,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:32,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:32,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:32,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 569 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:32,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:32,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:32,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:33,338 INFO L124 PetriNetUnfolderBase]: 1496/2261 cut-off events. [2024-06-14 13:19:33,338 INFO L125 PetriNetUnfolderBase]: For 9804/9804 co-relation queries the response was YES. [2024-06-14 13:19:33,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9313 conditions, 2261 events. 1496/2261 cut-off events. For 9804/9804 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10228 event pairs, 486 based on Foata normal form. 4/2264 useless extension candidates. Maximal degree in co-relation 9277. Up to 2212 conditions per place. [2024-06-14 13:19:33,351 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 77 selfloop transitions, 12 changer transitions 0/92 dead transitions. [2024-06-14 13:19:33,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 92 transitions, 803 flow [2024-06-14 13:19:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:19:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:19:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 13:19:33,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:19:33,355 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 569 flow. Second operand 6 states and 96 transitions. [2024-06-14 13:19:33,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 92 transitions, 803 flow [2024-06-14 13:19:33,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 779 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:33,371 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 596 flow [2024-06-14 13:19:33,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=596, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-14 13:19:33,372 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-14 13:19:33,373 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 596 flow [2024-06-14 13:19:33,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:33,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:33,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:33,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:19:33,373 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)] === [2024-06-14 13:19:33,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash -599087197, now seen corresponding path program 1 times [2024-06-14 13:19:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:33,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652988771] [2024-06-14 13:19:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:33,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:34,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:34,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652988771] [2024-06-14 13:19:34,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652988771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:34,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:34,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:34,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164129308] [2024-06-14 13:19:34,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:34,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:34,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:34,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:34,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:34,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 596 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:34,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:34,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:34,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:34,691 INFO L124 PetriNetUnfolderBase]: 1491/2254 cut-off events. [2024-06-14 13:19:34,691 INFO L125 PetriNetUnfolderBase]: For 11240/11240 co-relation queries the response was YES. [2024-06-14 13:19:34,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9574 conditions, 2254 events. 1491/2254 cut-off events. For 11240/11240 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10219 event pairs, 499 based on Foata normal form. 2/2255 useless extension candidates. Maximal degree in co-relation 9538. Up to 2196 conditions per place. [2024-06-14 13:19:34,705 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 73 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2024-06-14 13:19:34,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 92 transitions, 816 flow [2024-06-14 13:19:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:19:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:19:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:19:34,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-14 13:19:34,707 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 596 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:19:34,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 92 transitions, 816 flow [2024-06-14 13:19:34,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 783 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:34,719 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 607 flow [2024-06-14 13:19:34,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=607, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-14 13:19:34,719 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-14 13:19:34,720 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 607 flow [2024-06-14 13:19:34,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:34,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:34,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:34,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:19:34,720 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)] === [2024-06-14 13:19:34,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:34,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1539740350, now seen corresponding path program 1 times [2024-06-14 13:19:34,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:34,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890374881] [2024-06-14 13:19:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:34,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:35,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:35,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890374881] [2024-06-14 13:19:35,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890374881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:35,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:35,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:35,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240295747] [2024-06-14 13:19:35,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:35,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:35,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:35,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:35,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:35,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:35,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 607 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:35,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:35,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:35,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:36,128 INFO L124 PetriNetUnfolderBase]: 1481/2241 cut-off events. [2024-06-14 13:19:36,129 INFO L125 PetriNetUnfolderBase]: For 12992/12994 co-relation queries the response was YES. [2024-06-14 13:19:36,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9683 conditions, 2241 events. 1481/2241 cut-off events. For 12992/12994 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10170 event pairs, 417 based on Foata normal form. 6/2246 useless extension candidates. Maximal degree in co-relation 9646. Up to 2035 conditions per place. [2024-06-14 13:19:36,142 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 83 selfloop transitions, 26 changer transitions 0/112 dead transitions. [2024-06-14 13:19:36,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 112 transitions, 935 flow [2024-06-14 13:19:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:19:36,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-14 13:19:36,144 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 607 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:19:36,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 112 transitions, 935 flow [2024-06-14 13:19:36,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 893 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:36,158 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 652 flow [2024-06-14 13:19:36,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=652, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-06-14 13:19:36,159 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-14 13:19:36,159 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 652 flow [2024-06-14 13:19:36,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:36,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:36,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:36,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:19:36,160 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)] === [2024-06-14 13:19:36,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:36,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1535925118, now seen corresponding path program 1 times [2024-06-14 13:19:36,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:36,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538587431] [2024-06-14 13:19:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:36,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:37,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:37,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538587431] [2024-06-14 13:19:37,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538587431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:37,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:37,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:37,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379203847] [2024-06-14 13:19:37,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:37,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:37,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:37,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:37,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:37,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 652 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:37,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:37,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:37,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:37,451 INFO L124 PetriNetUnfolderBase]: 1515/2295 cut-off events. [2024-06-14 13:19:37,451 INFO L125 PetriNetUnfolderBase]: For 15604/15606 co-relation queries the response was YES. [2024-06-14 13:19:37,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10422 conditions, 2295 events. 1515/2295 cut-off events. For 15604/15606 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10499 event pairs, 424 based on Foata normal form. 10/2304 useless extension candidates. Maximal degree in co-relation 10384. Up to 2119 conditions per place. [2024-06-14 13:19:37,464 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 22 changer transitions 0/107 dead transitions. [2024-06-14 13:19:37,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 107 transitions, 952 flow [2024-06-14 13:19:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:19:37,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 13:19:37,466 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 652 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:19:37,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 107 transitions, 952 flow [2024-06-14 13:19:37,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 891 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:37,480 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 675 flow [2024-06-14 13:19:37,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2024-06-14 13:19:37,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-14 13:19:37,482 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 675 flow [2024-06-14 13:19:37,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:37,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:37,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:37,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:19:37,482 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)] === [2024-06-14 13:19:37,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1878548224, now seen corresponding path program 2 times [2024-06-14 13:19:37,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:37,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138718172] [2024-06-14 13:19:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:37,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:38,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:38,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138718172] [2024-06-14 13:19:38,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138718172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:38,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:38,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:38,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2446266] [2024-06-14 13:19:38,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:38,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:38,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:38,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:38,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:38,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:38,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 675 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:38,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:38,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:38,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:38,845 INFO L124 PetriNetUnfolderBase]: 1532/2321 cut-off events. [2024-06-14 13:19:38,846 INFO L125 PetriNetUnfolderBase]: For 18036/18036 co-relation queries the response was YES. [2024-06-14 13:19:38,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10931 conditions, 2321 events. 1532/2321 cut-off events. For 18036/18036 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10550 event pairs, 484 based on Foata normal form. 4/2324 useless extension candidates. Maximal degree in co-relation 10892. Up to 2263 conditions per place. [2024-06-14 13:19:38,856 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-06-14 13:19:38,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 105 transitions, 957 flow [2024-06-14 13:19:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:38,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:19:38,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:19:38,858 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 675 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:19:38,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 105 transitions, 957 flow [2024-06-14 13:19:38,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 105 transitions, 897 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:38,873 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 676 flow [2024-06-14 13:19:38,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=676, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2024-06-14 13:19:38,873 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-14 13:19:38,874 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 676 flow [2024-06-14 13:19:38,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:38,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:38,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:38,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:19:38,874 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:38,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:38,875 INFO L85 PathProgramCache]: Analyzing trace with hash -15817378, now seen corresponding path program 3 times [2024-06-14 13:19:38,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:38,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467938750] [2024-06-14 13:19:38,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:38,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:39,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:39,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467938750] [2024-06-14 13:19:39,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467938750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:39,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:39,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:39,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236008091] [2024-06-14 13:19:39,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:39,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:39,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:39,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:39,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:39,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:39,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 676 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:39,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:39,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:39,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:40,229 INFO L124 PetriNetUnfolderBase]: 1549/2348 cut-off events. [2024-06-14 13:19:40,230 INFO L125 PetriNetUnfolderBase]: For 20789/20789 co-relation queries the response was YES. [2024-06-14 13:19:40,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11230 conditions, 2348 events. 1549/2348 cut-off events. For 20789/20789 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10708 event pairs, 464 based on Foata normal form. 4/2351 useless extension candidates. Maximal degree in co-relation 11190. Up to 2276 conditions per place. [2024-06-14 13:19:40,247 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 90 selfloop transitions, 14 changer transitions 0/107 dead transitions. [2024-06-14 13:19:40,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 964 flow [2024-06-14 13:19:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:19:40,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:19:40,249 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 676 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:19:40,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 964 flow [2024-06-14 13:19:40,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 921 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:40,270 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 700 flow [2024-06-14 13:19:40,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=700, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2024-06-14 13:19:40,270 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-14 13:19:40,270 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 700 flow [2024-06-14 13:19:40,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:40,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:40,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:40,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:19:40,271 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)] === [2024-06-14 13:19:40,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash -23234345, now seen corresponding path program 1 times [2024-06-14 13:19:40,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:40,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475597324] [2024-06-14 13:19:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:40,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:41,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:41,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475597324] [2024-06-14 13:19:41,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475597324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:41,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:41,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:41,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022783475] [2024-06-14 13:19:41,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:41,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:41,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:41,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:41,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 700 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:41,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:41,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:41,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:41,480 INFO L124 PetriNetUnfolderBase]: 1541/2337 cut-off events. [2024-06-14 13:19:41,480 INFO L125 PetriNetUnfolderBase]: For 23152/23154 co-relation queries the response was YES. [2024-06-14 13:19:41,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11413 conditions, 2337 events. 1541/2337 cut-off events. For 23152/23154 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10697 event pairs, 442 based on Foata normal form. 2/2338 useless extension candidates. Maximal degree in co-relation 11372. Up to 2170 conditions per place. [2024-06-14 13:19:41,494 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-14 13:19:41,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 109 transitions, 974 flow [2024-06-14 13:19:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:19:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:19:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:19:41,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 13:19:41,497 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 700 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:19:41,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 109 transitions, 974 flow [2024-06-14 13:19:41,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 109 transitions, 925 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:41,513 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 722 flow [2024-06-14 13:19:41,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=722, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-06-14 13:19:41,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-14 13:19:41,514 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 722 flow [2024-06-14 13:19:41,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:41,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:41,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:41,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:19:41,515 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)] === [2024-06-14 13:19:41,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:41,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1871196574, now seen corresponding path program 4 times [2024-06-14 13:19:41,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:41,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942183971] [2024-06-14 13:19:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:41,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:42,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:42,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942183971] [2024-06-14 13:19:42,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942183971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:42,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:42,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:42,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590561766] [2024-06-14 13:19:42,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:42,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:42,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:42,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:42,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:42,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:42,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 722 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:42,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:42,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:42,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:42,913 INFO L124 PetriNetUnfolderBase]: 1533/2324 cut-off events. [2024-06-14 13:19:42,913 INFO L125 PetriNetUnfolderBase]: For 25347/25347 co-relation queries the response was YES. [2024-06-14 13:19:42,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11535 conditions, 2324 events. 1533/2324 cut-off events. For 25347/25347 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10619 event pairs, 482 based on Foata normal form. 4/2327 useless extension candidates. Maximal degree in co-relation 11493. Up to 2230 conditions per place. [2024-06-14 13:19:42,924 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 86 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-14 13:19:42,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 109 transitions, 1020 flow [2024-06-14 13:19:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:42,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 13:19:42,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-14 13:19:42,925 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 722 flow. Second operand 7 states and 111 transitions. [2024-06-14 13:19:42,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 109 transitions, 1020 flow [2024-06-14 13:19:42,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 109 transitions, 964 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:42,944 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 752 flow [2024-06-14 13:19:42,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=752, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2024-06-14 13:19:42,944 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-14 13:19:42,944 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 752 flow [2024-06-14 13:19:42,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:42,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:42,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:42,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:19:42,945 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:42,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2024796048, now seen corresponding path program 1 times [2024-06-14 13:19:42,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:42,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874909899] [2024-06-14 13:19:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:43,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:43,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874909899] [2024-06-14 13:19:43,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874909899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:43,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:43,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:43,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599700012] [2024-06-14 13:19:43,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:43,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:43,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:43,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:43,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 752 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:43,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:43,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:43,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:43,923 INFO L124 PetriNetUnfolderBase]: 1527/2316 cut-off events. [2024-06-14 13:19:43,924 INFO L125 PetriNetUnfolderBase]: For 27829/27829 co-relation queries the response was YES. [2024-06-14 13:19:43,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11717 conditions, 2316 events. 1527/2316 cut-off events. For 27829/27829 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10529 event pairs, 481 based on Foata normal form. 2/2317 useless extension candidates. Maximal degree in co-relation 11674. Up to 2294 conditions per place. [2024-06-14 13:19:43,936 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 87 selfloop transitions, 10 changer transitions 0/100 dead transitions. [2024-06-14 13:19:43,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 992 flow [2024-06-14 13:19:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:19:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:19:43,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-06-14 13:19:43,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-14 13:19:43,937 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 752 flow. Second operand 5 states and 79 transitions. [2024-06-14 13:19:43,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 992 flow [2024-06-14 13:19:43,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 100 transitions, 926 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:43,957 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 742 flow [2024-06-14 13:19:43,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=742, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2024-06-14 13:19:43,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-14 13:19:43,957 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 742 flow [2024-06-14 13:19:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:43,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:43,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:19:43,958 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:43,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash 730455390, now seen corresponding path program 1 times [2024-06-14 13:19:43,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:43,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993922838] [2024-06-14 13:19:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:44,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:44,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993922838] [2024-06-14 13:19:44,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993922838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:44,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:44,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:44,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962566245] [2024-06-14 13:19:44,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:44,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:44,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:44,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:44,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:44,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:44,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 742 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:44,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:44,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:44,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:45,304 INFO L124 PetriNetUnfolderBase]: 1696/2596 cut-off events. [2024-06-14 13:19:45,304 INFO L125 PetriNetUnfolderBase]: For 32330/32332 co-relation queries the response was YES. [2024-06-14 13:19:45,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13132 conditions, 2596 events. 1696/2596 cut-off events. For 32330/32332 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12353 event pairs, 297 based on Foata normal form. 18/2613 useless extension candidates. Maximal degree in co-relation 13088. Up to 1837 conditions per place. [2024-06-14 13:19:45,319 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 28 changer transitions 0/136 dead transitions. [2024-06-14 13:19:45,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 136 transitions, 1238 flow [2024-06-14 13:19:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:19:45,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-14 13:19:45,321 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 742 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:19:45,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 136 transitions, 1238 flow [2024-06-14 13:19:45,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 1204 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:19:45,345 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 808 flow [2024-06-14 13:19:45,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=808, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2024-06-14 13:19:45,346 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-14 13:19:45,346 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 808 flow [2024-06-14 13:19:45,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:45,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:45,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:45,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:19:45,346 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)] === [2024-06-14 13:19:45,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:45,347 INFO L85 PathProgramCache]: Analyzing trace with hash 730515840, now seen corresponding path program 2 times [2024-06-14 13:19:45,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:45,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229907684] [2024-06-14 13:19:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:45,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229907684] [2024-06-14 13:19:46,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229907684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:46,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:46,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:46,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077862811] [2024-06-14 13:19:46,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:46,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:46,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:46,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:46,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:46,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 808 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:46,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:46,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:46,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:46,786 INFO L124 PetriNetUnfolderBase]: 1721/2643 cut-off events. [2024-06-14 13:19:46,786 INFO L125 PetriNetUnfolderBase]: For 35887/35889 co-relation queries the response was YES. [2024-06-14 13:19:46,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13596 conditions, 2643 events. 1721/2643 cut-off events. For 35887/35889 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12702 event pairs, 461 based on Foata normal form. 22/2664 useless extension candidates. Maximal degree in co-relation 13551. Up to 2271 conditions per place. [2024-06-14 13:19:46,801 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 104 selfloop transitions, 29 changer transitions 0/136 dead transitions. [2024-06-14 13:19:46,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 136 transitions, 1216 flow [2024-06-14 13:19:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:19:46,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-14 13:19:46,803 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 808 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:19:46,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 136 transitions, 1216 flow [2024-06-14 13:19:46,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 1179 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:46,833 INFO L231 Difference]: Finished difference. Result has 99 places, 94 transitions, 861 flow [2024-06-14 13:19:46,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=861, PETRI_PLACES=99, PETRI_TRANSITIONS=94} [2024-06-14 13:19:46,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-14 13:19:46,834 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 94 transitions, 861 flow [2024-06-14 13:19:46,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:46,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:46,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:19:46,835 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)] === [2024-06-14 13:19:46,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash 848787970, now seen corresponding path program 1 times [2024-06-14 13:19:46,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:46,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931809075] [2024-06-14 13:19:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:47,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931809075] [2024-06-14 13:19:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931809075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:47,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:47,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:47,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637215387] [2024-06-14 13:19:47,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:47,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:47,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:47,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:47,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 861 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:47,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:47,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:47,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:48,190 INFO L124 PetriNetUnfolderBase]: 1713/2631 cut-off events. [2024-06-14 13:19:48,190 INFO L125 PetriNetUnfolderBase]: For 36575/36577 co-relation queries the response was YES. [2024-06-14 13:19:48,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13796 conditions, 2631 events. 1713/2631 cut-off events. For 36575/36577 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12648 event pairs, 482 based on Foata normal form. 6/2636 useless extension candidates. Maximal degree in co-relation 13749. Up to 2386 conditions per place. [2024-06-14 13:19:48,205 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 95 selfloop transitions, 25 changer transitions 0/123 dead transitions. [2024-06-14 13:19:48,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 123 transitions, 1213 flow [2024-06-14 13:19:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 13:19:48,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-14 13:19:48,207 INFO L175 Difference]: Start difference. First operand has 99 places, 94 transitions, 861 flow. Second operand 7 states and 117 transitions. [2024-06-14 13:19:48,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 123 transitions, 1213 flow [2024-06-14 13:19:48,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 123 transitions, 1153 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:19:48,243 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 923 flow [2024-06-14 13:19:48,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=923, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2024-06-14 13:19:48,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-14 13:19:48,244 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 923 flow [2024-06-14 13:19:48,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:48,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:48,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:48,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:19:48,244 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)] === [2024-06-14 13:19:48,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:48,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2130723488, now seen corresponding path program 2 times [2024-06-14 13:19:48,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:48,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782913997] [2024-06-14 13:19:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:48,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:48,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:48,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782913997] [2024-06-14 13:19:48,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782913997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:48,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:48,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:48,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882320130] [2024-06-14 13:19:48,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:48,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:48,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:48,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:49,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:49,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 923 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:49,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:49,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:49,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:49,488 INFO L124 PetriNetUnfolderBase]: 1730/2658 cut-off events. [2024-06-14 13:19:49,488 INFO L125 PetriNetUnfolderBase]: For 40037/40039 co-relation queries the response was YES. [2024-06-14 13:19:49,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14215 conditions, 2658 events. 1730/2658 cut-off events. For 40037/40039 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12769 event pairs, 500 based on Foata normal form. 4/2661 useless extension candidates. Maximal degree in co-relation 14166. Up to 2562 conditions per place. [2024-06-14 13:19:49,507 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 104 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2024-06-14 13:19:49,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 122 transitions, 1245 flow [2024-06-14 13:19:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 13:19:49,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-14 13:19:49,509 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 923 flow. Second operand 7 states and 111 transitions. [2024-06-14 13:19:49,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 122 transitions, 1245 flow [2024-06-14 13:19:49,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 122 transitions, 1194 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 13:19:49,540 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 943 flow [2024-06-14 13:19:49,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=943, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2024-06-14 13:19:49,541 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-14 13:19:49,541 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 943 flow [2024-06-14 13:19:49,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:49,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:49,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:49,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:19:49,542 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:49,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:49,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2052254516, now seen corresponding path program 3 times [2024-06-14 13:19:49,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:49,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677797408] [2024-06-14 13:19:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:49,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:50,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:50,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677797408] [2024-06-14 13:19:50,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677797408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:50,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:50,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:50,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95928148] [2024-06-14 13:19:50,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:50,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:50,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:50,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:50,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:50,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 943 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:50,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:50,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:50,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:51,078 INFO L124 PetriNetUnfolderBase]: 1747/2685 cut-off events. [2024-06-14 13:19:51,078 INFO L125 PetriNetUnfolderBase]: For 44131/44133 co-relation queries the response was YES. [2024-06-14 13:19:51,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14640 conditions, 2685 events. 1747/2685 cut-off events. For 44131/44133 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12943 event pairs, 482 based on Foata normal form. 4/2688 useless extension candidates. Maximal degree in co-relation 14589. Up to 2348 conditions per place. [2024-06-14 13:19:51,094 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 90 selfloop transitions, 38 changer transitions 0/131 dead transitions. [2024-06-14 13:19:51,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 131 transitions, 1413 flow [2024-06-14 13:19:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:19:51,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:19:51,096 INFO L175 Difference]: Start difference. First operand has 104 places, 100 transitions, 943 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:19:51,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 131 transitions, 1413 flow [2024-06-14 13:19:51,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 131 transitions, 1360 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:51,134 INFO L231 Difference]: Finished difference. Result has 106 places, 104 transitions, 1049 flow [2024-06-14 13:19:51,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1049, PETRI_PLACES=106, PETRI_TRANSITIONS=104} [2024-06-14 13:19:51,134 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-14 13:19:51,134 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 104 transitions, 1049 flow [2024-06-14 13:19:51,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:51,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:51,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:51,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:19:51,135 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)] === [2024-06-14 13:19:51,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2122442768, now seen corresponding path program 4 times [2024-06-14 13:19:51,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:51,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448871223] [2024-06-14 13:19:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:51,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:51,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448871223] [2024-06-14 13:19:51,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448871223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:51,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:51,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:51,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190794808] [2024-06-14 13:19:51,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:51,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:51,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:52,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:52,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 104 transitions, 1049 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:52,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:52,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:52,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:52,504 INFO L124 PetriNetUnfolderBase]: 1739/2673 cut-off events. [2024-06-14 13:19:52,505 INFO L125 PetriNetUnfolderBase]: For 47401/47403 co-relation queries the response was YES. [2024-06-14 13:19:52,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14891 conditions, 2673 events. 1739/2673 cut-off events. For 47401/47403 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12844 event pairs, 494 based on Foata normal form. 4/2676 useless extension candidates. Maximal degree in co-relation 14839. Up to 2470 conditions per place. [2024-06-14 13:19:52,523 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 97 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-14 13:19:52,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 132 transitions, 1381 flow [2024-06-14 13:19:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:19:52,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-14 13:19:52,526 INFO L175 Difference]: Start difference. First operand has 106 places, 104 transitions, 1049 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:19:52,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 132 transitions, 1381 flow [2024-06-14 13:19:52,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 132 transitions, 1295 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:52,573 INFO L231 Difference]: Finished difference. Result has 109 places, 104 transitions, 1037 flow [2024-06-14 13:19:52,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1037, PETRI_PLACES=109, PETRI_TRANSITIONS=104} [2024-06-14 13:19:52,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-14 13:19:52,574 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 104 transitions, 1037 flow [2024-06-14 13:19:52,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:52,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:52,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:52,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:19:52,575 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:52,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:52,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1454079852, now seen corresponding path program 1 times [2024-06-14 13:19:52,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:52,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795685264] [2024-06-14 13:19:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:52,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:53,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:53,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795685264] [2024-06-14 13:19:53,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795685264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:53,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:53,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:53,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354630655] [2024-06-14 13:19:53,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:53,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:53,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:53,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:53,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 104 transitions, 1037 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:53,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:53,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:53,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:53,784 INFO L124 PetriNetUnfolderBase]: 1749/2708 cut-off events. [2024-06-14 13:19:53,785 INFO L125 PetriNetUnfolderBase]: For 50857/50857 co-relation queries the response was YES. [2024-06-14 13:19:53,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15017 conditions, 2708 events. 1749/2708 cut-off events. For 50857/50857 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13249 event pairs, 893 based on Foata normal form. 2/2709 useless extension candidates. Maximal degree in co-relation 14964. Up to 2635 conditions per place. [2024-06-14 13:19:53,804 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 103 selfloop transitions, 20 changer transitions 0/126 dead transitions. [2024-06-14 13:19:53,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 1436 flow [2024-06-14 13:19:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:19:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:19:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-14 13:19:53,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-14 13:19:53,806 INFO L175 Difference]: Start difference. First operand has 109 places, 104 transitions, 1037 flow. Second operand 7 states and 104 transitions. [2024-06-14 13:19:53,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 1436 flow [2024-06-14 13:19:53,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 126 transitions, 1352 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:53,855 INFO L231 Difference]: Finished difference. Result has 111 places, 112 transitions, 1082 flow [2024-06-14 13:19:53,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1082, PETRI_PLACES=111, PETRI_TRANSITIONS=112} [2024-06-14 13:19:53,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-14 13:19:53,855 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 112 transitions, 1082 flow [2024-06-14 13:19:53,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:53,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:53,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:53,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:19:53,856 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:53,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:53,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1437074078, now seen corresponding path program 2 times [2024-06-14 13:19:53,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:53,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917279828] [2024-06-14 13:19:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:53,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:54,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917279828] [2024-06-14 13:19:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917279828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:54,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:54,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:19:54,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993876200] [2024-06-14 13:19:54,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:54,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:19:54,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:19:54,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:19:54,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:54,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 112 transitions, 1082 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:54,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:54,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:54,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:54,951 INFO L124 PetriNetUnfolderBase]: 1743/2700 cut-off events. [2024-06-14 13:19:54,951 INFO L125 PetriNetUnfolderBase]: For 53976/53976 co-relation queries the response was YES. [2024-06-14 13:19:54,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15215 conditions, 2700 events. 1743/2700 cut-off events. For 53976/53976 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13230 event pairs, 892 based on Foata normal form. 2/2701 useless extension candidates. Maximal degree in co-relation 15160. Up to 2638 conditions per place. [2024-06-14 13:19:54,969 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 104 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2024-06-14 13:19:54,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 123 transitions, 1352 flow [2024-06-14 13:19:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:19:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:19:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-14 13:19:54,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-14 13:19:54,971 INFO L175 Difference]: Start difference. First operand has 111 places, 112 transitions, 1082 flow. Second operand 5 states and 83 transitions. [2024-06-14 13:19:54,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 123 transitions, 1352 flow [2024-06-14 13:19:55,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 123 transitions, 1311 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 13:19:55,025 INFO L231 Difference]: Finished difference. Result has 114 places, 112 transitions, 1085 flow [2024-06-14 13:19:55,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1085, PETRI_PLACES=114, PETRI_TRANSITIONS=112} [2024-06-14 13:19:55,025 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-14 13:19:55,025 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 112 transitions, 1085 flow [2024-06-14 13:19:55,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:55,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:55,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:55,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:19:55,026 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)] === [2024-06-14 13:19:55,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:55,026 INFO L85 PathProgramCache]: Analyzing trace with hash 936730022, now seen corresponding path program 1 times [2024-06-14 13:19:55,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:55,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707071233] [2024-06-14 13:19:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:55,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:55,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:55,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707071233] [2024-06-14 13:19:55,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707071233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:55,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:55,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:55,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48263175] [2024-06-14 13:19:55,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:55,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:55,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:55,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:55,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:55,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 112 transitions, 1085 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:55,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:55,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:55,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:56,295 INFO L124 PetriNetUnfolderBase]: 1792/2756 cut-off events. [2024-06-14 13:19:56,295 INFO L125 PetriNetUnfolderBase]: For 58141/58149 co-relation queries the response was YES. [2024-06-14 13:19:56,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15785 conditions, 2756 events. 1792/2756 cut-off events. For 58141/58149 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13445 event pairs, 508 based on Foata normal form. 11/2766 useless extension candidates. Maximal degree in co-relation 15728. Up to 2579 conditions per place. [2024-06-14 13:19:56,311 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 128 selfloop transitions, 39 changer transitions 0/170 dead transitions. [2024-06-14 13:19:56,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1900 flow [2024-06-14 13:19:56,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:19:56,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-14 13:19:56,312 INFO L175 Difference]: Start difference. First operand has 114 places, 112 transitions, 1085 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:19:56,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1900 flow [2024-06-14 13:19:56,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 170 transitions, 1864 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:56,365 INFO L231 Difference]: Finished difference. Result has 122 places, 139 transitions, 1491 flow [2024-06-14 13:19:56,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=122, PETRI_TRANSITIONS=139} [2024-06-14 13:19:56,366 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-14 13:19:56,366 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 139 transitions, 1491 flow [2024-06-14 13:19:56,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:56,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:56,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:56,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:19:56,367 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)] === [2024-06-14 13:19:56,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash 301568966, now seen corresponding path program 2 times [2024-06-14 13:19:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:56,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177982302] [2024-06-14 13:19:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:56,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:56,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177982302] [2024-06-14 13:19:56,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177982302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:56,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:56,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:56,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653879309] [2024-06-14 13:19:56,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:56,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:56,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:56,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:56,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 139 transitions, 1491 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:56,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:56,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:56,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:57,617 INFO L124 PetriNetUnfolderBase]: 2008/3079 cut-off events. [2024-06-14 13:19:57,617 INFO L125 PetriNetUnfolderBase]: For 70022/70026 co-relation queries the response was YES. [2024-06-14 13:19:57,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19643 conditions, 3079 events. 2008/3079 cut-off events. For 70022/70026 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15260 event pairs, 701 based on Foata normal form. 7/3085 useless extension candidates. Maximal degree in co-relation 19581. Up to 2710 conditions per place. [2024-06-14 13:19:57,639 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 147 selfloop transitions, 74 changer transitions 0/224 dead transitions. [2024-06-14 13:19:57,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 224 transitions, 2941 flow [2024-06-14 13:19:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:19:57,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-14 13:19:57,640 INFO L175 Difference]: Start difference. First operand has 122 places, 139 transitions, 1491 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:19:57,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 224 transitions, 2941 flow [2024-06-14 13:19:57,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 224 transitions, 2849 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-06-14 13:19:57,730 INFO L231 Difference]: Finished difference. Result has 132 places, 187 transitions, 2341 flow [2024-06-14 13:19:57,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2341, PETRI_PLACES=132, PETRI_TRANSITIONS=187} [2024-06-14 13:19:57,730 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-14 13:19:57,730 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 187 transitions, 2341 flow [2024-06-14 13:19:57,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:57,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:57,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:57,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:19:57,731 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:57,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:57,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1304346495, now seen corresponding path program 1 times [2024-06-14 13:19:57,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:57,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033170836] [2024-06-14 13:19:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:57,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:58,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:58,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033170836] [2024-06-14 13:19:58,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033170836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:58,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:58,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:58,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27096165] [2024-06-14 13:19:58,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:58,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:58,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:58,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:19:58,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 187 transitions, 2341 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:58,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:58,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:19:58,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:59,648 INFO L124 PetriNetUnfolderBase]: 2156/3321 cut-off events. [2024-06-14 13:19:59,648 INFO L125 PetriNetUnfolderBase]: For 82169/82179 co-relation queries the response was YES. [2024-06-14 13:19:59,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22101 conditions, 3321 events. 2156/3321 cut-off events. For 82169/82179 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16841 event pairs, 695 based on Foata normal form. 22/3342 useless extension candidates. Maximal degree in co-relation 22033. Up to 2842 conditions per place. [2024-06-14 13:19:59,673 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 188 selfloop transitions, 57 changer transitions 0/248 dead transitions. [2024-06-14 13:19:59,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 248 transitions, 3301 flow [2024-06-14 13:19:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:19:59,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:19:59,693 INFO L175 Difference]: Start difference. First operand has 132 places, 187 transitions, 2341 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:19:59,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 248 transitions, 3301 flow [2024-06-14 13:19:59,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 248 transitions, 3231 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 13:19:59,817 INFO L231 Difference]: Finished difference. Result has 142 places, 207 transitions, 2731 flow [2024-06-14 13:19:59,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2731, PETRI_PLACES=142, PETRI_TRANSITIONS=207} [2024-06-14 13:19:59,822 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-14 13:19:59,822 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 207 transitions, 2731 flow [2024-06-14 13:19:59,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:59,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:59,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:59,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:19:59,823 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:59,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash 301838077, now seen corresponding path program 1 times [2024-06-14 13:19:59,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:59,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387653208] [2024-06-14 13:19:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:59,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:00,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387653208] [2024-06-14 13:20:00,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387653208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:00,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:00,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:00,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305018653] [2024-06-14 13:20:00,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:00,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:00,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:00,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:00,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:00,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 207 transitions, 2731 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:00,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:00,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:00,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:01,126 INFO L124 PetriNetUnfolderBase]: 2166/3329 cut-off events. [2024-06-14 13:20:01,126 INFO L125 PetriNetUnfolderBase]: For 86013/86017 co-relation queries the response was YES. [2024-06-14 13:20:01,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22946 conditions, 3329 events. 2166/3329 cut-off events. For 86013/86017 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16840 event pairs, 758 based on Foata normal form. 6/3334 useless extension candidates. Maximal degree in co-relation 22873. Up to 3237 conditions per place. [2024-06-14 13:20:01,153 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 207 selfloop transitions, 28 changer transitions 0/238 dead transitions. [2024-06-14 13:20:01,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 238 transitions, 3424 flow [2024-06-14 13:20:01,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:20:01,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:20:01,155 INFO L175 Difference]: Start difference. First operand has 142 places, 207 transitions, 2731 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:20:01,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 238 transitions, 3424 flow [2024-06-14 13:20:01,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 238 transitions, 3356 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:01,255 INFO L231 Difference]: Finished difference. Result has 148 places, 216 transitions, 2847 flow [2024-06-14 13:20:01,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2663, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2847, PETRI_PLACES=148, PETRI_TRANSITIONS=216} [2024-06-14 13:20:01,258 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-14 13:20:01,258 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 216 transitions, 2847 flow [2024-06-14 13:20:01,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:01,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:01,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:01,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:20:01,259 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:01,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash 301837736, now seen corresponding path program 3 times [2024-06-14 13:20:01,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:01,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084373203] [2024-06-14 13:20:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:01,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:01,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:01,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084373203] [2024-06-14 13:20:01,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084373203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:01,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:01,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:01,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412293290] [2024-06-14 13:20:01,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:01,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:01,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:01,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:01,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:01,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 216 transitions, 2847 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:01,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:01,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:01,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:02,591 INFO L124 PetriNetUnfolderBase]: 2209/3389 cut-off events. [2024-06-14 13:20:02,591 INFO L125 PetriNetUnfolderBase]: For 92509/92513 co-relation queries the response was YES. [2024-06-14 13:20:02,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23633 conditions, 3389 events. 2209/3389 cut-off events. For 92509/92513 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17167 event pairs, 758 based on Foata normal form. 7/3395 useless extension candidates. Maximal degree in co-relation 23558. Up to 3290 conditions per place. [2024-06-14 13:20:02,620 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 213 selfloop transitions, 34 changer transitions 0/250 dead transitions. [2024-06-14 13:20:02,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 250 transitions, 3651 flow [2024-06-14 13:20:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 13:20:02,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-14 13:20:02,622 INFO L175 Difference]: Start difference. First operand has 148 places, 216 transitions, 2847 flow. Second operand 9 states and 138 transitions. [2024-06-14 13:20:02,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 250 transitions, 3651 flow [2024-06-14 13:20:02,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 250 transitions, 3592 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-14 13:20:02,762 INFO L231 Difference]: Finished difference. Result has 156 places, 228 transitions, 3076 flow [2024-06-14 13:20:02,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3076, PETRI_PLACES=156, PETRI_TRANSITIONS=228} [2024-06-14 13:20:02,762 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-14 13:20:02,762 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 228 transitions, 3076 flow [2024-06-14 13:20:02,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:02,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:02,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:02,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:20:02,763 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)] === [2024-06-14 13:20:02,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash 327314180, now seen corresponding path program 4 times [2024-06-14 13:20:02,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:02,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113301454] [2024-06-14 13:20:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:02,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:03,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:03,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113301454] [2024-06-14 13:20:03,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113301454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:03,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:03,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:03,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580745468] [2024-06-14 13:20:03,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:03,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:03,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:03,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:03,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:03,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:03,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 228 transitions, 3076 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:03,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:03,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:03,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:04,054 INFO L124 PetriNetUnfolderBase]: 2248/3446 cut-off events. [2024-06-14 13:20:04,054 INFO L125 PetriNetUnfolderBase]: For 99226/99232 co-relation queries the response was YES. [2024-06-14 13:20:04,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24401 conditions, 3446 events. 2248/3446 cut-off events. For 99226/99232 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17524 event pairs, 723 based on Foata normal form. 9/3454 useless extension candidates. Maximal degree in co-relation 24323. Up to 2950 conditions per place. [2024-06-14 13:20:04,086 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 147 selfloop transitions, 117 changer transitions 0/267 dead transitions. [2024-06-14 13:20:04,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 267 transitions, 4024 flow [2024-06-14 13:20:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:20:04,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-14 13:20:04,087 INFO L175 Difference]: Start difference. First operand has 156 places, 228 transitions, 3076 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:20:04,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 267 transitions, 4024 flow [2024-06-14 13:20:04,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 267 transitions, 3907 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:04,254 INFO L231 Difference]: Finished difference. Result has 158 places, 241 transitions, 3478 flow [2024-06-14 13:20:04,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3478, PETRI_PLACES=158, PETRI_TRANSITIONS=241} [2024-06-14 13:20:04,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-14 13:20:04,254 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 241 transitions, 3478 flow [2024-06-14 13:20:04,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:04,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:04,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:04,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:20:04,255 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)] === [2024-06-14 13:20:04,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash 542624253, now seen corresponding path program 2 times [2024-06-14 13:20:04,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:04,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951995100] [2024-06-14 13:20:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:05,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:05,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951995100] [2024-06-14 13:20:05,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951995100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:05,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:05,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531245180] [2024-06-14 13:20:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:05,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:05,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:05,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 241 transitions, 3478 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:05,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:05,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:05,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:06,143 INFO L124 PetriNetUnfolderBase]: 2269/3495 cut-off events. [2024-06-14 13:20:06,144 INFO L125 PetriNetUnfolderBase]: For 112610/112620 co-relation queries the response was YES. [2024-06-14 13:20:06,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25350 conditions, 3495 events. 2269/3495 cut-off events. For 112610/112620 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17926 event pairs, 666 based on Foata normal form. 32/3526 useless extension candidates. Maximal degree in co-relation 25270. Up to 2680 conditions per place. [2024-06-14 13:20:06,175 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 197 selfloop transitions, 76 changer transitions 0/276 dead transitions. [2024-06-14 13:20:06,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 276 transitions, 4194 flow [2024-06-14 13:20:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:06,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:20:06,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-14 13:20:06,177 INFO L175 Difference]: Start difference. First operand has 158 places, 241 transitions, 3478 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:20:06,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 276 transitions, 4194 flow [2024-06-14 13:20:06,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 276 transitions, 4114 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-14 13:20:06,371 INFO L231 Difference]: Finished difference. Result has 164 places, 242 transitions, 3586 flow [2024-06-14 13:20:06,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3586, PETRI_PLACES=164, PETRI_TRANSITIONS=242} [2024-06-14 13:20:06,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-14 13:20:06,371 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 242 transitions, 3586 flow [2024-06-14 13:20:06,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:06,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:06,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:06,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:20:06,372 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:06,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:06,372 INFO L85 PathProgramCache]: Analyzing trace with hash -533914788, now seen corresponding path program 5 times [2024-06-14 13:20:06,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:06,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255109807] [2024-06-14 13:20:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:06,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:07,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:07,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255109807] [2024-06-14 13:20:07,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255109807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:07,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:07,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:07,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189206926] [2024-06-14 13:20:07,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:07,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:07,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:07,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:07,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:07,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:07,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 242 transitions, 3586 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:07,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:07,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:07,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:07,730 INFO L124 PetriNetUnfolderBase]: 2325/3560 cut-off events. [2024-06-14 13:20:07,730 INFO L125 PetriNetUnfolderBase]: For 107778/107782 co-relation queries the response was YES. [2024-06-14 13:20:07,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26247 conditions, 3560 events. 2325/3560 cut-off events. For 107778/107782 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18204 event pairs, 766 based on Foata normal form. 7/3566 useless extension candidates. Maximal degree in co-relation 26165. Up to 3428 conditions per place. [2024-06-14 13:20:07,763 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 226 selfloop transitions, 49 changer transitions 0/278 dead transitions. [2024-06-14 13:20:07,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 278 transitions, 4538 flow [2024-06-14 13:20:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:20:07,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-14 13:20:07,764 INFO L175 Difference]: Start difference. First operand has 164 places, 242 transitions, 3586 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:20:07,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 278 transitions, 4538 flow [2024-06-14 13:20:07,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 278 transitions, 4354 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:07,948 INFO L231 Difference]: Finished difference. Result has 167 places, 258 transitions, 3826 flow [2024-06-14 13:20:07,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3826, PETRI_PLACES=167, PETRI_TRANSITIONS=258} [2024-06-14 13:20:07,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-14 13:20:07,949 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 258 transitions, 3826 flow [2024-06-14 13:20:07,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:07,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:07,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:07,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:20:07,950 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:07,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:07,950 INFO L85 PathProgramCache]: Analyzing trace with hash -533914447, now seen corresponding path program 2 times [2024-06-14 13:20:07,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:07,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460512698] [2024-06-14 13:20:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:07,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:08,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:08,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460512698] [2024-06-14 13:20:08,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460512698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:08,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:08,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:08,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240447311] [2024-06-14 13:20:08,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:08,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:08,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:08,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:08,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:08,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:08,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 258 transitions, 3826 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:08,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:08,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:08,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:09,193 INFO L124 PetriNetUnfolderBase]: 2335/3574 cut-off events. [2024-06-14 13:20:09,194 INFO L125 PetriNetUnfolderBase]: For 105019/105023 co-relation queries the response was YES. [2024-06-14 13:20:09,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26049 conditions, 3574 events. 2335/3574 cut-off events. For 105019/105023 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18294 event pairs, 768 based on Foata normal form. 6/3579 useless extension candidates. Maximal degree in co-relation 25965. Up to 3475 conditions per place. [2024-06-14 13:20:09,225 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 243 selfloop transitions, 33 changer transitions 0/279 dead transitions. [2024-06-14 13:20:09,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 279 transitions, 4539 flow [2024-06-14 13:20:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:20:09,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-14 13:20:09,227 INFO L175 Difference]: Start difference. First operand has 167 places, 258 transitions, 3826 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:20:09,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 279 transitions, 4539 flow [2024-06-14 13:20:09,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 279 transitions, 4411 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:09,416 INFO L231 Difference]: Finished difference. Result has 170 places, 261 transitions, 3821 flow [2024-06-14 13:20:09,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3821, PETRI_PLACES=170, PETRI_TRANSITIONS=261} [2024-06-14 13:20:09,416 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-14 13:20:09,416 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 261 transitions, 3821 flow [2024-06-14 13:20:09,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:09,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:09,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:09,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:20:09,417 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)] === [2024-06-14 13:20:09,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1809291035, now seen corresponding path program 3 times [2024-06-14 13:20:09,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:09,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543611457] [2024-06-14 13:20:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:09,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:10,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:10,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543611457] [2024-06-14 13:20:10,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543611457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:10,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:10,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:10,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516099316] [2024-06-14 13:20:10,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:10,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:10,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:10,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:10,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:10,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:10,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 261 transitions, 3821 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:10,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:10,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:10,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:10,997 INFO L124 PetriNetUnfolderBase]: 2376/3654 cut-off events. [2024-06-14 13:20:10,998 INFO L125 PetriNetUnfolderBase]: For 109806/109808 co-relation queries the response was YES. [2024-06-14 13:20:11,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26238 conditions, 3654 events. 2376/3654 cut-off events. For 109806/109808 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18858 event pairs, 897 based on Foata normal form. 12/3665 useless extension candidates. Maximal degree in co-relation 26154. Up to 3458 conditions per place. [2024-06-14 13:20:11,033 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 270 selfloop transitions, 17 changer transitions 0/290 dead transitions. [2024-06-14 13:20:11,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 290 transitions, 4523 flow [2024-06-14 13:20:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:20:11,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-14 13:20:11,042 INFO L175 Difference]: Start difference. First operand has 170 places, 261 transitions, 3821 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:20:11,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 290 transitions, 4523 flow [2024-06-14 13:20:11,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 290 transitions, 4430 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:11,233 INFO L231 Difference]: Finished difference. Result has 172 places, 262 transitions, 3796 flow [2024-06-14 13:20:11,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3796, PETRI_PLACES=172, PETRI_TRANSITIONS=262} [2024-06-14 13:20:11,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-14 13:20:11,234 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 262 transitions, 3796 flow [2024-06-14 13:20:11,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:11,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:11,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:11,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:20:11,235 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:11,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1371211592, now seen corresponding path program 1 times [2024-06-14 13:20:11,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:11,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876947674] [2024-06-14 13:20:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:11,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:12,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:12,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876947674] [2024-06-14 13:20:12,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876947674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:12,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:12,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:12,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218933862] [2024-06-14 13:20:12,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:12,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:12,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:12,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:12,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 262 transitions, 3796 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:12,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:12,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:12,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:13,043 INFO L124 PetriNetUnfolderBase]: 2348/3597 cut-off events. [2024-06-14 13:20:13,043 INFO L125 PetriNetUnfolderBase]: For 99144/99154 co-relation queries the response was YES. [2024-06-14 13:20:13,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25353 conditions, 3597 events. 2348/3597 cut-off events. For 99144/99154 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18393 event pairs, 533 based on Foata normal form. 24/3620 useless extension candidates. Maximal degree in co-relation 25270. Up to 2859 conditions per place. [2024-06-14 13:20:13,076 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 222 selfloop transitions, 77 changer transitions 0/302 dead transitions. [2024-06-14 13:20:13,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 302 transitions, 4555 flow [2024-06-14 13:20:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:20:13,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-14 13:20:13,078 INFO L175 Difference]: Start difference. First operand has 172 places, 262 transitions, 3796 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:20:13,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 302 transitions, 4555 flow [2024-06-14 13:20:13,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 302 transitions, 4493 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:20:13,242 INFO L231 Difference]: Finished difference. Result has 172 places, 261 transitions, 3862 flow [2024-06-14 13:20:13,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3690, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3862, PETRI_PLACES=172, PETRI_TRANSITIONS=261} [2024-06-14 13:20:13,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-14 13:20:13,243 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 261 transitions, 3862 flow [2024-06-14 13:20:13,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:13,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:13,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:13,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:20:13,244 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)] === [2024-06-14 13:20:13,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:13,244 INFO L85 PathProgramCache]: Analyzing trace with hash -208787377, now seen corresponding path program 3 times [2024-06-14 13:20:13,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:13,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790633247] [2024-06-14 13:20:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:13,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:13,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790633247] [2024-06-14 13:20:13,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790633247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:13,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:13,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:13,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569245115] [2024-06-14 13:20:13,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:13,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:13,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:13,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:13,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:13,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 261 transitions, 3862 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:13,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:13,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:13,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:14,485 INFO L124 PetriNetUnfolderBase]: 2358/3623 cut-off events. [2024-06-14 13:20:14,485 INFO L125 PetriNetUnfolderBase]: For 97962/97962 co-relation queries the response was YES. [2024-06-14 13:20:14,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25741 conditions, 3623 events. 2358/3623 cut-off events. For 97962/97962 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18692 event pairs, 915 based on Foata normal form. 2/3624 useless extension candidates. Maximal degree in co-relation 25658. Up to 3564 conditions per place. [2024-06-14 13:20:14,515 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 256 selfloop transitions, 17 changer transitions 0/276 dead transitions. [2024-06-14 13:20:14,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 276 transitions, 4498 flow [2024-06-14 13:20:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-14 13:20:14,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:20:14,516 INFO L175 Difference]: Start difference. First operand has 172 places, 261 transitions, 3862 flow. Second operand 6 states and 90 transitions. [2024-06-14 13:20:14,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 276 transitions, 4498 flow [2024-06-14 13:20:14,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 276 transitions, 4332 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:20:14,685 INFO L231 Difference]: Finished difference. Result has 172 places, 267 transitions, 3810 flow [2024-06-14 13:20:14,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3810, PETRI_PLACES=172, PETRI_TRANSITIONS=267} [2024-06-14 13:20:14,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-14 13:20:14,686 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 267 transitions, 3810 flow [2024-06-14 13:20:14,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:14,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:14,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:14,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:20:14,686 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:14,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1599806641, now seen corresponding path program 4 times [2024-06-14 13:20:14,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:14,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749542125] [2024-06-14 13:20:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:14,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:15,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:15,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749542125] [2024-06-14 13:20:15,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749542125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:15,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:15,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:15,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041658495] [2024-06-14 13:20:15,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:15,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:15,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:15,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:15,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:15,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 267 transitions, 3810 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:15,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:15,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:15,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:15,990 INFO L124 PetriNetUnfolderBase]: 2360/3618 cut-off events. [2024-06-14 13:20:15,990 INFO L125 PetriNetUnfolderBase]: For 93943/93947 co-relation queries the response was YES. [2024-06-14 13:20:16,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25374 conditions, 3618 events. 2360/3618 cut-off events. For 93943/93947 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18618 event pairs, 762 based on Foata normal form. 6/3623 useless extension candidates. Maximal degree in co-relation 25290. Up to 3516 conditions per place. [2024-06-14 13:20:16,021 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 243 selfloop transitions, 40 changer transitions 0/286 dead transitions. [2024-06-14 13:20:16,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 286 transitions, 4544 flow [2024-06-14 13:20:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:16,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 13:20:16,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-14 13:20:16,027 INFO L175 Difference]: Start difference. First operand has 172 places, 267 transitions, 3810 flow. Second operand 6 states and 101 transitions. [2024-06-14 13:20:16,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 286 transitions, 4544 flow [2024-06-14 13:20:16,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 286 transitions, 4499 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 13:20:16,182 INFO L231 Difference]: Finished difference. Result has 176 places, 270 transitions, 3913 flow [2024-06-14 13:20:16,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3913, PETRI_PLACES=176, PETRI_TRANSITIONS=270} [2024-06-14 13:20:16,183 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-14 13:20:16,183 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 270 transitions, 3913 flow [2024-06-14 13:20:16,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:16,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:16,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:16,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:20:16,184 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:16,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1599806982, now seen corresponding path program 6 times [2024-06-14 13:20:16,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:16,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027533091] [2024-06-14 13:20:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:16,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:16,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027533091] [2024-06-14 13:20:16,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027533091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:16,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:16,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:16,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028695436] [2024-06-14 13:20:16,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:16,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:16,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:16,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 270 transitions, 3913 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:16,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:16,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:16,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:17,605 INFO L124 PetriNetUnfolderBase]: 2403/3680 cut-off events. [2024-06-14 13:20:17,606 INFO L125 PetriNetUnfolderBase]: For 100647/100651 co-relation queries the response was YES. [2024-06-14 13:20:17,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26204 conditions, 3680 events. 2403/3680 cut-off events. For 100647/100651 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19014 event pairs, 702 based on Foata normal form. 7/3686 useless extension candidates. Maximal degree in co-relation 26118. Up to 3342 conditions per place. [2024-06-14 13:20:17,639 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 232 selfloop transitions, 77 changer transitions 0/312 dead transitions. [2024-06-14 13:20:17,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 312 transitions, 4956 flow [2024-06-14 13:20:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:20:17,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-14 13:20:17,641 INFO L175 Difference]: Start difference. First operand has 176 places, 270 transitions, 3913 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:20:17,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 312 transitions, 4956 flow [2024-06-14 13:20:17,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 312 transitions, 4864 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:17,816 INFO L231 Difference]: Finished difference. Result has 181 places, 283 transitions, 4331 flow [2024-06-14 13:20:17,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4331, PETRI_PLACES=181, PETRI_TRANSITIONS=283} [2024-06-14 13:20:17,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 13:20:17,817 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 283 transitions, 4331 flow [2024-06-14 13:20:17,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:17,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:17,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:17,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:20:17,817 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:17,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -664485029, now seen corresponding path program 1 times [2024-06-14 13:20:17,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:17,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250979576] [2024-06-14 13:20:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:17,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:18,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:18,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250979576] [2024-06-14 13:20:18,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250979576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:18,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:18,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:18,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018861703] [2024-06-14 13:20:18,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:18,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:18,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:18,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:18,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:18,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:18,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 283 transitions, 4331 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:18,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:18,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:18,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:19,267 INFO L124 PetriNetUnfolderBase]: 2423/3713 cut-off events. [2024-06-14 13:20:19,268 INFO L125 PetriNetUnfolderBase]: For 105454/105454 co-relation queries the response was YES. [2024-06-14 13:20:19,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26927 conditions, 3713 events. 2423/3713 cut-off events. For 105454/105454 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19180 event pairs, 917 based on Foata normal form. 4/3716 useless extension candidates. Maximal degree in co-relation 26839. Up to 3585 conditions per place. [2024-06-14 13:20:19,300 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 272 selfloop transitions, 31 changer transitions 0/306 dead transitions. [2024-06-14 13:20:19,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 306 transitions, 5133 flow [2024-06-14 13:20:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:20:19,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:20:19,304 INFO L175 Difference]: Start difference. First operand has 181 places, 283 transitions, 4331 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:20:19,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 306 transitions, 5133 flow [2024-06-14 13:20:19,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 306 transitions, 5017 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:19,478 INFO L231 Difference]: Finished difference. Result has 185 places, 289 transitions, 4354 flow [2024-06-14 13:20:19,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4354, PETRI_PLACES=185, PETRI_TRANSITIONS=289} [2024-06-14 13:20:19,479 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-14 13:20:19,480 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 289 transitions, 4354 flow [2024-06-14 13:20:19,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:19,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:19,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:19,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:20:19,480 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)] === [2024-06-14 13:20:19,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:19,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1599414739, now seen corresponding path program 2 times [2024-06-14 13:20:19,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:19,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185893250] [2024-06-14 13:20:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:19,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:20,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:20,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185893250] [2024-06-14 13:20:20,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185893250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:20,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:20,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:20,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105057942] [2024-06-14 13:20:20,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:20,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:20,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:20,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:20,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:20,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 289 transitions, 4354 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:20,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:20,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:20,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:20,971 INFO L124 PetriNetUnfolderBase]: 2443/3741 cut-off events. [2024-06-14 13:20:20,971 INFO L125 PetriNetUnfolderBase]: For 111585/111585 co-relation queries the response was YES. [2024-06-14 13:20:20,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27267 conditions, 3741 events. 2443/3741 cut-off events. For 111585/111585 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19350 event pairs, 913 based on Foata normal form. 4/3744 useless extension candidates. Maximal degree in co-relation 27178. Up to 3625 conditions per place. [2024-06-14 13:20:21,000 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 278 selfloop transitions, 29 changer transitions 0/310 dead transitions. [2024-06-14 13:20:21,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 310 transitions, 5142 flow [2024-06-14 13:20:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:20:21,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-14 13:20:21,001 INFO L175 Difference]: Start difference. First operand has 185 places, 289 transitions, 4354 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:20:21,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 310 transitions, 5142 flow [2024-06-14 13:20:21,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 310 transitions, 5094 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:21,166 INFO L231 Difference]: Finished difference. Result has 190 places, 292 transitions, 4409 flow [2024-06-14 13:20:21,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4409, PETRI_PLACES=190, PETRI_TRANSITIONS=292} [2024-06-14 13:20:21,167 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-14 13:20:21,167 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 292 transitions, 4409 flow [2024-06-14 13:20:21,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:21,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:21,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:21,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:20:21,168 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)] === [2024-06-14 13:20:21,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:21,168 INFO L85 PathProgramCache]: Analyzing trace with hash 541300891, now seen corresponding path program 3 times [2024-06-14 13:20:21,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:21,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132669314] [2024-06-14 13:20:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:21,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:21,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:21,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132669314] [2024-06-14 13:20:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132669314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:21,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951720946] [2024-06-14 13:20:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:21,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:21,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:21,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:21,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 292 transitions, 4409 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:21,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:21,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:21,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:22,607 INFO L124 PetriNetUnfolderBase]: 2431/3725 cut-off events. [2024-06-14 13:20:22,607 INFO L125 PetriNetUnfolderBase]: For 114766/114766 co-relation queries the response was YES. [2024-06-14 13:20:22,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27249 conditions, 3725 events. 2431/3725 cut-off events. For 114766/114766 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19223 event pairs, 915 based on Foata normal form. 4/3728 useless extension candidates. Maximal degree in co-relation 27158. Up to 3617 conditions per place. [2024-06-14 13:20:22,649 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 276 selfloop transitions, 28 changer transitions 0/307 dead transitions. [2024-06-14 13:20:22,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 307 transitions, 5085 flow [2024-06-14 13:20:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 13:20:22,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-14 13:20:22,651 INFO L175 Difference]: Start difference. First operand has 190 places, 292 transitions, 4409 flow. Second operand 6 states and 99 transitions. [2024-06-14 13:20:22,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 307 transitions, 5085 flow [2024-06-14 13:20:22,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 307 transitions, 4975 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:22,928 INFO L231 Difference]: Finished difference. Result has 190 places, 292 transitions, 4362 flow [2024-06-14 13:20:22,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4362, PETRI_PLACES=190, PETRI_TRANSITIONS=292} [2024-06-14 13:20:22,930 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-14 13:20:22,931 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 292 transitions, 4362 flow [2024-06-14 13:20:22,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:22,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:22,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:22,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:20:22,936 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)] === [2024-06-14 13:20:22,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:22,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1599406803, now seen corresponding path program 1 times [2024-06-14 13:20:22,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:22,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633203766] [2024-06-14 13:20:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:22,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:23,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:23,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633203766] [2024-06-14 13:20:23,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633203766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:23,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:23,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:23,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072214676] [2024-06-14 13:20:23,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:23,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:23,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:23,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:23,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:23,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 292 transitions, 4362 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:23,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:23,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:23,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:24,712 INFO L124 PetriNetUnfolderBase]: 2426/3718 cut-off events. [2024-06-14 13:20:24,712 INFO L125 PetriNetUnfolderBase]: For 117406/117406 co-relation queries the response was YES. [2024-06-14 13:20:24,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27193 conditions, 3718 events. 2426/3718 cut-off events. For 117406/117406 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19097 event pairs, 910 based on Foata normal form. 2/3719 useless extension candidates. Maximal degree in co-relation 27101. Up to 3660 conditions per place. [2024-06-14 13:20:24,744 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 285 selfloop transitions, 15 changer transitions 0/303 dead transitions. [2024-06-14 13:20:24,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 303 transitions, 5022 flow [2024-06-14 13:20:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:20:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:20:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-14 13:20:24,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-14 13:20:24,746 INFO L175 Difference]: Start difference. First operand has 190 places, 292 transitions, 4362 flow. Second operand 6 states and 89 transitions. [2024-06-14 13:20:24,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 303 transitions, 5022 flow [2024-06-14 13:20:24,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 303 transitions, 4966 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:24,975 INFO L231 Difference]: Finished difference. Result has 191 places, 294 transitions, 4377 flow [2024-06-14 13:20:24,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4306, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4377, PETRI_PLACES=191, PETRI_TRANSITIONS=294} [2024-06-14 13:20:24,976 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-14 13:20:24,976 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 294 transitions, 4377 flow [2024-06-14 13:20:24,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:24,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:24,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:24,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:20:24,977 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)] === [2024-06-14 13:20:24,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:24,977 INFO L85 PathProgramCache]: Analyzing trace with hash -626536971, now seen corresponding path program 1 times [2024-06-14 13:20:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:24,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220669016] [2024-06-14 13:20:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:24,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:25,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:25,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220669016] [2024-06-14 13:20:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220669016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:25,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:25,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:25,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775949555] [2024-06-14 13:20:25,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:25,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:25,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:25,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:25,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:25,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-14 13:20:25,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 294 transitions, 4377 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) [2024-06-14 13:20:25,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:25,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-14 13:20:25,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:26,606 INFO L124 PetriNetUnfolderBase]: 2579/3954 cut-off events. [2024-06-14 13:20:26,607 INFO L125 PetriNetUnfolderBase]: For 146709/146745 co-relation queries the response was YES. [2024-06-14 13:20:26,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29526 conditions, 3954 events. 2579/3954 cut-off events. For 146709/146745 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20954 event pairs, 603 based on Foata normal form. 20/3930 useless extension candidates. Maximal degree in co-relation 29433. Up to 2495 conditions per place. [2024-06-14 13:20:26,648 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 188 selfloop transitions, 140 changer transitions 0/366 dead transitions. [2024-06-14 13:20:26,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 366 transitions, 5825 flow [2024-06-14 13:20:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:26,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:20:26,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-14 13:20:26,650 INFO L175 Difference]: Start difference. First operand has 191 places, 294 transitions, 4377 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:20:26,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 366 transitions, 5825 flow [2024-06-14 13:20:26,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 366 transitions, 5770 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:26,897 INFO L231 Difference]: Finished difference. Result has 198 places, 324 transitions, 5203 flow [2024-06-14 13:20:26,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5203, PETRI_PLACES=198, PETRI_TRANSITIONS=324} [2024-06-14 13:20:26,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-14 13:20:26,898 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 324 transitions, 5203 flow [2024-06-14 13:20:26,898 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) [2024-06-14 13:20:26,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:26,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:26,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:20:26,899 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)] === [2024-06-14 13:20:26,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:26,899 INFO L85 PathProgramCache]: Analyzing trace with hash 565333685, now seen corresponding path program 1 times [2024-06-14 13:20:26,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:26,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059840441] [2024-06-14 13:20:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:26,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:27,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:27,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059840441] [2024-06-14 13:20:27,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059840441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:27,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:27,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:27,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911243355] [2024-06-14 13:20:27,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:27,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:27,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:27,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:27,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:27,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 324 transitions, 5203 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:27,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:27,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:27,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:28,528 INFO L124 PetriNetUnfolderBase]: 2714/4123 cut-off events. [2024-06-14 13:20:28,529 INFO L125 PetriNetUnfolderBase]: For 150251/150269 co-relation queries the response was YES. [2024-06-14 13:20:28,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32558 conditions, 4123 events. 2714/4123 cut-off events. For 150251/150269 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21442 event pairs, 761 based on Foata normal form. 22/4144 useless extension candidates. Maximal degree in co-relation 32461. Up to 3645 conditions per place. [2024-06-14 13:20:28,577 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 259 selfloop transitions, 113 changer transitions 0/375 dead transitions. [2024-06-14 13:20:28,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 375 transitions, 6775 flow [2024-06-14 13:20:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:20:28,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-14 13:20:28,582 INFO L175 Difference]: Start difference. First operand has 198 places, 324 transitions, 5203 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:20:28,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 375 transitions, 6775 flow [2024-06-14 13:20:28,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 375 transitions, 6700 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-14 13:20:28,934 INFO L231 Difference]: Finished difference. Result has 205 places, 342 transitions, 5807 flow [2024-06-14 13:20:28,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5807, PETRI_PLACES=205, PETRI_TRANSITIONS=342} [2024-06-14 13:20:28,935 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-14 13:20:28,935 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 342 transitions, 5807 flow [2024-06-14 13:20:28,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:28,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:28,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:28,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:20:28,936 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)] === [2024-06-14 13:20:28,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1068337769, now seen corresponding path program 2 times [2024-06-14 13:20:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:28,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573452851] [2024-06-14 13:20:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:29,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:29,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573452851] [2024-06-14 13:20:29,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573452851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:29,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:29,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:29,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513239240] [2024-06-14 13:20:29,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:29,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:29,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:29,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:29,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:29,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:29,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 342 transitions, 5807 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:29,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:29,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:29,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:30,451 INFO L124 PetriNetUnfolderBase]: 2698/4101 cut-off events. [2024-06-14 13:20:30,452 INFO L125 PetriNetUnfolderBase]: For 151289/151293 co-relation queries the response was YES. [2024-06-14 13:20:30,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32553 conditions, 4101 events. 2698/4101 cut-off events. For 151289/151293 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21307 event pairs, 800 based on Foata normal form. 8/4108 useless extension candidates. Maximal degree in co-relation 32453. Up to 4002 conditions per place. [2024-06-14 13:20:30,494 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 323 selfloop transitions, 37 changer transitions 0/363 dead transitions. [2024-06-14 13:20:30,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 363 transitions, 6607 flow [2024-06-14 13:20:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-14 13:20:30,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-14 13:20:30,496 INFO L175 Difference]: Start difference. First operand has 205 places, 342 transitions, 5807 flow. Second operand 9 states and 136 transitions. [2024-06-14 13:20:30,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 363 transitions, 6607 flow [2024-06-14 13:20:30,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 363 transitions, 6370 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:30,820 INFO L231 Difference]: Finished difference. Result has 210 places, 342 transitions, 5655 flow [2024-06-14 13:20:30,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5570, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5655, PETRI_PLACES=210, PETRI_TRANSITIONS=342} [2024-06-14 13:20:30,821 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-14 13:20:30,821 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 342 transitions, 5655 flow [2024-06-14 13:20:30,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:30,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:30,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:30,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:20:30,822 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)] === [2024-06-14 13:20:30,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash 758465363, now seen corresponding path program 2 times [2024-06-14 13:20:30,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:30,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387270748] [2024-06-14 13:20:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:30,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:31,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387270748] [2024-06-14 13:20:31,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387270748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:31,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:31,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:31,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466941128] [2024-06-14 13:20:31,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:31,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:31,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:31,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:31,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:31,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 342 transitions, 5655 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:31,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:31,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:31,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:32,900 INFO L124 PetriNetUnfolderBase]: 2807/4263 cut-off events. [2024-06-14 13:20:32,901 INFO L125 PetriNetUnfolderBase]: For 160463/160469 co-relation queries the response was YES. [2024-06-14 13:20:32,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33480 conditions, 4263 events. 2807/4263 cut-off events. For 160463/160469 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22298 event pairs, 753 based on Foata normal form. 9/4271 useless extension candidates. Maximal degree in co-relation 33379. Up to 3675 conditions per place. [2024-06-14 13:20:32,944 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 263 selfloop transitions, 138 changer transitions 0/404 dead transitions. [2024-06-14 13:20:32,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 404 transitions, 7280 flow [2024-06-14 13:20:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:20:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:20:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 13:20:32,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-14 13:20:32,945 INFO L175 Difference]: Start difference. First operand has 210 places, 342 transitions, 5655 flow. Second operand 10 states and 172 transitions. [2024-06-14 13:20:32,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 404 transitions, 7280 flow [2024-06-14 13:20:33,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 404 transitions, 7206 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:20:33,303 INFO L231 Difference]: Finished difference. Result has 213 places, 361 transitions, 6178 flow [2024-06-14 13:20:33,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6178, PETRI_PLACES=213, PETRI_TRANSITIONS=361} [2024-06-14 13:20:33,304 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-14 13:20:33,304 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 361 transitions, 6178 flow [2024-06-14 13:20:33,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:33,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:33,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:33,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:20:33,305 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)] === [2024-06-14 13:20:33,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:33,305 INFO L85 PathProgramCache]: Analyzing trace with hash 758704683, now seen corresponding path program 1 times [2024-06-14 13:20:33,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:33,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748219487] [2024-06-14 13:20:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:33,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:33,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:33,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748219487] [2024-06-14 13:20:33,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748219487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:33,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:33,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:33,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413105354] [2024-06-14 13:20:33,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:33,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:34,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:34,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 361 transitions, 6178 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:34,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:34,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:34,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:35,148 INFO L124 PetriNetUnfolderBase]: 3340/4998 cut-off events. [2024-06-14 13:20:35,148 INFO L125 PetriNetUnfolderBase]: For 210051/210067 co-relation queries the response was YES. [2024-06-14 13:20:35,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40770 conditions, 4998 events. 3340/4998 cut-off events. For 210051/210067 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26151 event pairs, 659 based on Foata normal form. 24/5021 useless extension candidates. Maximal degree in co-relation 40667. Up to 2961 conditions per place. [2024-06-14 13:20:35,202 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 278 selfloop transitions, 185 changer transitions 0/466 dead transitions. [2024-06-14 13:20:35,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 466 transitions, 8512 flow [2024-06-14 13:20:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:20:35,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-14 13:20:35,204 INFO L175 Difference]: Start difference. First operand has 213 places, 361 transitions, 6178 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:20:35,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 466 transitions, 8512 flow [2024-06-14 13:20:35,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 466 transitions, 8346 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:35,674 INFO L231 Difference]: Finished difference. Result has 221 places, 408 transitions, 7322 flow [2024-06-14 13:20:35,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6012, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7322, PETRI_PLACES=221, PETRI_TRANSITIONS=408} [2024-06-14 13:20:35,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-14 13:20:35,675 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 408 transitions, 7322 flow [2024-06-14 13:20:35,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:35,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:35,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:35,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:20:35,676 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)] === [2024-06-14 13:20:35,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1969103093, now seen corresponding path program 3 times [2024-06-14 13:20:35,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:35,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309084429] [2024-06-14 13:20:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:35,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:36,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:36,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309084429] [2024-06-14 13:20:36,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309084429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:36,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:36,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:36,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490528878] [2024-06-14 13:20:36,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:36,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:36,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:36,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:36,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:36,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:36,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 408 transitions, 7322 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:36,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:36,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:36,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:37,774 INFO L124 PetriNetUnfolderBase]: 3485/5202 cut-off events. [2024-06-14 13:20:37,774 INFO L125 PetriNetUnfolderBase]: For 235277/235281 co-relation queries the response was YES. [2024-06-14 13:20:37,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45205 conditions, 5202 events. 3485/5202 cut-off events. For 235277/235281 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27322 event pairs, 933 based on Foata normal form. 13/5214 useless extension candidates. Maximal degree in co-relation 45096. Up to 4918 conditions per place. [2024-06-14 13:20:37,834 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 396 selfloop transitions, 63 changer transitions 0/462 dead transitions. [2024-06-14 13:20:37,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 462 transitions, 8947 flow [2024-06-14 13:20:37,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:20:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:20:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:20:37,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-14 13:20:37,836 INFO L175 Difference]: Start difference. First operand has 221 places, 408 transitions, 7322 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:20:37,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 462 transitions, 8947 flow [2024-06-14 13:20:38,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 462 transitions, 8714 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:38,434 INFO L231 Difference]: Finished difference. Result has 230 places, 430 transitions, 7639 flow [2024-06-14 13:20:38,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7102, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7639, PETRI_PLACES=230, PETRI_TRANSITIONS=430} [2024-06-14 13:20:38,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-14 13:20:38,435 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 430 transitions, 7639 flow [2024-06-14 13:20:38,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:38,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:38,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:38,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:20:38,436 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)] === [2024-06-14 13:20:38,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1930673013, now seen corresponding path program 2 times [2024-06-14 13:20:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:38,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150301708] [2024-06-14 13:20:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:38,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:39,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:39,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150301708] [2024-06-14 13:20:39,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150301708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:39,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:39,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:39,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853199778] [2024-06-14 13:20:39,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:39,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:39,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:39,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:39,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:39,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:39,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 430 transitions, 7639 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:39,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:39,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:39,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:40,337 INFO L124 PetriNetUnfolderBase]: 3577/5330 cut-off events. [2024-06-14 13:20:40,337 INFO L125 PetriNetUnfolderBase]: For 253002/253006 co-relation queries the response was YES. [2024-06-14 13:20:40,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45973 conditions, 5330 events. 3577/5330 cut-off events. For 253002/253006 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28071 event pairs, 949 based on Foata normal form. 16/5345 useless extension candidates. Maximal degree in co-relation 45861. Up to 4922 conditions per place. [2024-06-14 13:20:40,399 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 392 selfloop transitions, 78 changer transitions 0/473 dead transitions. [2024-06-14 13:20:40,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 473 transitions, 9155 flow [2024-06-14 13:20:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:20:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:20:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 13:20:40,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-14 13:20:40,401 INFO L175 Difference]: Start difference. First operand has 230 places, 430 transitions, 7639 flow. Second operand 10 states and 166 transitions. [2024-06-14 13:20:40,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 473 transitions, 9155 flow [2024-06-14 13:20:40,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 473 transitions, 9029 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:40,959 INFO L231 Difference]: Finished difference. Result has 237 places, 440 transitions, 7891 flow [2024-06-14 13:20:40,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7523, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7891, PETRI_PLACES=237, PETRI_TRANSITIONS=440} [2024-06-14 13:20:40,959 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-14 13:20:40,959 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 440 transitions, 7891 flow [2024-06-14 13:20:40,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:40,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:40,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:40,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:20:40,960 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)] === [2024-06-14 13:20:40,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:40,961 INFO L85 PathProgramCache]: Analyzing trace with hash 767046783, now seen corresponding path program 3 times [2024-06-14 13:20:40,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:40,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281995295] [2024-06-14 13:20:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:40,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:41,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:41,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281995295] [2024-06-14 13:20:41,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281995295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:41,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:41,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:41,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431985163] [2024-06-14 13:20:41,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:41,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:41,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:41,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:41,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:41,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 440 transitions, 7891 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:41,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:41,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:41,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:42,939 INFO L124 PetriNetUnfolderBase]: 3595/5356 cut-off events. [2024-06-14 13:20:42,939 INFO L125 PetriNetUnfolderBase]: For 255517/255521 co-relation queries the response was YES. [2024-06-14 13:20:42,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46522 conditions, 5356 events. 3595/5356 cut-off events. For 255517/255521 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28187 event pairs, 947 based on Foata normal form. 10/5365 useless extension candidates. Maximal degree in co-relation 46407. Up to 4942 conditions per place. [2024-06-14 13:20:43,012 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 394 selfloop transitions, 80 changer transitions 0/477 dead transitions. [2024-06-14 13:20:43,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 477 transitions, 9299 flow [2024-06-14 13:20:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:20:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:20:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-14 13:20:43,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:20:43,014 INFO L175 Difference]: Start difference. First operand has 237 places, 440 transitions, 7891 flow. Second operand 11 states and 176 transitions. [2024-06-14 13:20:43,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 477 transitions, 9299 flow [2024-06-14 13:20:43,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 477 transitions, 9071 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:43,727 INFO L231 Difference]: Finished difference. Result has 243 places, 444 transitions, 7924 flow [2024-06-14 13:20:43,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7924, PETRI_PLACES=243, PETRI_TRANSITIONS=444} [2024-06-14 13:20:43,729 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-14 13:20:43,729 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 444 transitions, 7924 flow [2024-06-14 13:20:43,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:43,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:43,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:43,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:20:43,730 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)] === [2024-06-14 13:20:43,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:43,730 INFO L85 PathProgramCache]: Analyzing trace with hash 619940895, now seen corresponding path program 4 times [2024-06-14 13:20:43,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:43,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131719161] [2024-06-14 13:20:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:43,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:44,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:44,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131719161] [2024-06-14 13:20:44,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131719161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:44,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:44,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:44,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370735395] [2024-06-14 13:20:44,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:44,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:44,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:44,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:44,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:44,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:44,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 444 transitions, 7924 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:44,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:44,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:44,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:45,789 INFO L124 PetriNetUnfolderBase]: 3770/5603 cut-off events. [2024-06-14 13:20:45,789 INFO L125 PetriNetUnfolderBase]: For 274786/274792 co-relation queries the response was YES. [2024-06-14 13:20:45,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48781 conditions, 5603 events. 3770/5603 cut-off events. For 274786/274792 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29670 event pairs, 769 based on Foata normal form. 8/5610 useless extension candidates. Maximal degree in co-relation 48664. Up to 3751 conditions per place. [2024-06-14 13:20:45,862 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 247 selfloop transitions, 287 changer transitions 0/537 dead transitions. [2024-06-14 13:20:45,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 537 transitions, 10251 flow [2024-06-14 13:20:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:20:45,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-14 13:20:45,863 INFO L175 Difference]: Start difference. First operand has 243 places, 444 transitions, 7924 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:20:45,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 537 transitions, 10251 flow [2024-06-14 13:20:46,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 537 transitions, 10088 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:20:46,523 INFO L231 Difference]: Finished difference. Result has 247 places, 495 transitions, 9509 flow [2024-06-14 13:20:46,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9509, PETRI_PLACES=247, PETRI_TRANSITIONS=495} [2024-06-14 13:20:46,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-14 13:20:46,523 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 495 transitions, 9509 flow [2024-06-14 13:20:46,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:46,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:46,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:46,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:20:46,524 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)] === [2024-06-14 13:20:46,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash 620180215, now seen corresponding path program 4 times [2024-06-14 13:20:46,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:46,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623306194] [2024-06-14 13:20:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:46,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:47,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:47,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623306194] [2024-06-14 13:20:47,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623306194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:47,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:47,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:47,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44324678] [2024-06-14 13:20:47,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:47,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:47,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:47,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:47,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:47,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 495 transitions, 9509 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:47,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:47,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:47,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:48,573 INFO L124 PetriNetUnfolderBase]: 3926/5820 cut-off events. [2024-06-14 13:20:48,573 INFO L125 PetriNetUnfolderBase]: For 314312/314318 co-relation queries the response was YES. [2024-06-14 13:20:48,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54217 conditions, 5820 events. 3926/5820 cut-off events. For 314312/314318 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30816 event pairs, 733 based on Foata normal form. 16/5835 useless extension candidates. Maximal degree in co-relation 54096. Up to 3320 conditions per place. [2024-06-14 13:20:48,652 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 239 selfloop transitions, 307 changer transitions 0/549 dead transitions. [2024-06-14 13:20:48,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 549 transitions, 11436 flow [2024-06-14 13:20:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:20:48,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-14 13:20:48,654 INFO L175 Difference]: Start difference. First operand has 247 places, 495 transitions, 9509 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:20:48,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 549 transitions, 11436 flow [2024-06-14 13:20:49,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 549 transitions, 11273 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-14 13:20:49,620 INFO L231 Difference]: Finished difference. Result has 254 places, 511 transitions, 10431 flow [2024-06-14 13:20:49,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9360, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10431, PETRI_PLACES=254, PETRI_TRANSITIONS=511} [2024-06-14 13:20:49,621 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-14 13:20:49,621 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 511 transitions, 10431 flow [2024-06-14 13:20:49,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:49,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:49,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:49,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:20:49,622 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)] === [2024-06-14 13:20:49,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash 620179905, now seen corresponding path program 5 times [2024-06-14 13:20:49,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:49,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247443771] [2024-06-14 13:20:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:49,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:50,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:50,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247443771] [2024-06-14 13:20:50,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247443771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:50,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:50,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:50,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139114755] [2024-06-14 13:20:50,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:50,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:50,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:50,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:50,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:50,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:50,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 511 transitions, 10431 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:50,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:50,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:50,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:51,763 INFO L124 PetriNetUnfolderBase]: 3882/5771 cut-off events. [2024-06-14 13:20:51,764 INFO L125 PetriNetUnfolderBase]: For 322673/322679 co-relation queries the response was YES. [2024-06-14 13:20:51,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55372 conditions, 5771 events. 3882/5771 cut-off events. For 322673/322679 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30659 event pairs, 829 based on Foata normal form. 20/5790 useless extension candidates. Maximal degree in co-relation 55248. Up to 4245 conditions per place. [2024-06-14 13:20:51,840 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 304 selfloop transitions, 245 changer transitions 0/552 dead transitions. [2024-06-14 13:20:51,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 552 transitions, 12085 flow [2024-06-14 13:20:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:20:51,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-14 13:20:51,842 INFO L175 Difference]: Start difference. First operand has 254 places, 511 transitions, 10431 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:20:51,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 552 transitions, 12085 flow [2024-06-14 13:20:52,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 552 transitions, 11595 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:52,741 INFO L231 Difference]: Finished difference. Result has 258 places, 512 transitions, 10495 flow [2024-06-14 13:20:52,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9945, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10495, PETRI_PLACES=258, PETRI_TRANSITIONS=512} [2024-06-14 13:20:52,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-14 13:20:52,742 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 512 transitions, 10495 flow [2024-06-14 13:20:52,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:52,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:52,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:52,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:20:52,742 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)] === [2024-06-14 13:20:52,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:52,743 INFO L85 PathProgramCache]: Analyzing trace with hash 623754143, now seen corresponding path program 3 times [2024-06-14 13:20:52,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:52,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612145275] [2024-06-14 13:20:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:52,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:53,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:53,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612145275] [2024-06-14 13:20:53,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612145275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:53,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:53,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:53,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199135400] [2024-06-14 13:20:53,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:53,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:53,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:53,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:53,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 512 transitions, 10495 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:53,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:53,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:53,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:54,823 INFO L124 PetriNetUnfolderBase]: 3924/5820 cut-off events. [2024-06-14 13:20:54,824 INFO L125 PetriNetUnfolderBase]: For 333794/333816 co-relation queries the response was YES. [2024-06-14 13:20:54,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55859 conditions, 5820 events. 3924/5820 cut-off events. For 333794/333816 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 30852 event pairs, 930 based on Foata normal form. 32/5851 useless extension candidates. Maximal degree in co-relation 55734. Up to 5168 conditions per place. [2024-06-14 13:20:54,911 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 377 selfloop transitions, 181 changer transitions 0/561 dead transitions. [2024-06-14 13:20:54,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 561 transitions, 12581 flow [2024-06-14 13:20:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:20:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:20:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:20:54,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:20:54,913 INFO L175 Difference]: Start difference. First operand has 258 places, 512 transitions, 10495 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:20:54,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 561 transitions, 12581 flow [2024-06-14 13:20:56,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 561 transitions, 12177 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:56,015 INFO L231 Difference]: Finished difference. Result has 262 places, 534 transitions, 11193 flow [2024-06-14 13:20:56,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10112, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11193, PETRI_PLACES=262, PETRI_TRANSITIONS=534} [2024-06-14 13:20:56,016 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-14 13:20:56,016 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 534 transitions, 11193 flow [2024-06-14 13:20:56,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:56,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:56,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:56,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:20:56,017 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)] === [2024-06-14 13:20:56,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:56,018 INFO L85 PathProgramCache]: Analyzing trace with hash 628515743, now seen corresponding path program 4 times [2024-06-14 13:20:56,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:56,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19455349] [2024-06-14 13:20:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:56,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:56,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:56,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19455349] [2024-06-14 13:20:56,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19455349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:56,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:56,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:20:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646325460] [2024-06-14 13:20:56,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:56,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:20:56,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:20:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:20:56,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:20:56,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 534 transitions, 11193 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:56,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:56,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:20:56,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:58,058 INFO L124 PetriNetUnfolderBase]: 3908/5796 cut-off events. [2024-06-14 13:20:58,058 INFO L125 PetriNetUnfolderBase]: For 329931/329935 co-relation queries the response was YES. [2024-06-14 13:20:58,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55395 conditions, 5796 events. 3908/5796 cut-off events. For 329931/329935 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30696 event pairs, 1047 based on Foata normal form. 8/5803 useless extension candidates. Maximal degree in co-relation 55268. Up to 5671 conditions per place. [2024-06-14 13:20:58,129 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 501 selfloop transitions, 49 changer transitions 0/553 dead transitions. [2024-06-14 13:20:58,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 553 transitions, 12379 flow [2024-06-14 13:20:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:20:58,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-14 13:20:58,130 INFO L175 Difference]: Start difference. First operand has 262 places, 534 transitions, 11193 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:20:58,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 553 transitions, 12379 flow [2024-06-14 13:20:59,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 553 transitions, 11999 flow, removed 115 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:59,050 INFO L231 Difference]: Finished difference. Result has 267 places, 534 transitions, 10931 flow [2024-06-14 13:20:59,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10813, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10931, PETRI_PLACES=267, PETRI_TRANSITIONS=534} [2024-06-14 13:20:59,051 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-14 13:20:59,051 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 534 transitions, 10931 flow [2024-06-14 13:20:59,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:59,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:59,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:59,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:20:59,052 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)] === [2024-06-14 13:20:59,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:59,052 INFO L85 PathProgramCache]: Analyzing trace with hash 628511775, now seen corresponding path program 6 times [2024-06-14 13:20:59,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:59,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250984654] [2024-06-14 13:20:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:59,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:59,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:59,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250984654] [2024-06-14 13:20:59,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250984654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:59,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:59,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:59,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328937716] [2024-06-14 13:20:59,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:59,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:59,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:00,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:00,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 534 transitions, 10931 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:00,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:00,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:00,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:01,325 INFO L124 PetriNetUnfolderBase]: 3923/5817 cut-off events. [2024-06-14 13:21:01,325 INFO L125 PetriNetUnfolderBase]: For 328109/328113 co-relation queries the response was YES. [2024-06-14 13:21:01,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54905 conditions, 5817 events. 3923/5817 cut-off events. For 328109/328113 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 30831 event pairs, 1047 based on Foata normal form. 7/5823 useless extension candidates. Maximal degree in co-relation 54777. Up to 5670 conditions per place. [2024-06-14 13:21:01,401 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 499 selfloop transitions, 57 changer transitions 0/559 dead transitions. [2024-06-14 13:21:01,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 559 transitions, 12220 flow [2024-06-14 13:21:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-14 13:21:01,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-14 13:21:01,403 INFO L175 Difference]: Start difference. First operand has 267 places, 534 transitions, 10931 flow. Second operand 9 states and 134 transitions. [2024-06-14 13:21:01,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 559 transitions, 12220 flow [2024-06-14 13:21:02,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 559 transitions, 12119 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:21:02,300 INFO L231 Difference]: Finished difference. Result has 268 places, 538 transitions, 11045 flow [2024-06-14 13:21:02,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10830, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11045, PETRI_PLACES=268, PETRI_TRANSITIONS=538} [2024-06-14 13:21:02,301 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-14 13:21:02,301 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 538 transitions, 11045 flow [2024-06-14 13:21:02,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:02,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:02,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:02,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:21:02,302 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)] === [2024-06-14 13:21:02,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1565148417, now seen corresponding path program 5 times [2024-06-14 13:21:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:02,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999174045] [2024-06-14 13:21:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:02,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:03,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:03,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999174045] [2024-06-14 13:21:03,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999174045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:03,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:03,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:03,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455225556] [2024-06-14 13:21:03,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:03,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:03,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:03,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:03,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:03,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 538 transitions, 11045 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:03,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:03,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:03,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:04,614 INFO L124 PetriNetUnfolderBase]: 4249/6267 cut-off events. [2024-06-14 13:21:04,615 INFO L125 PetriNetUnfolderBase]: For 377493/377497 co-relation queries the response was YES. [2024-06-14 13:21:04,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60299 conditions, 6267 events. 4249/6267 cut-off events. For 377493/377497 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33421 event pairs, 1023 based on Foata normal form. 10/6276 useless extension candidates. Maximal degree in co-relation 60171. Up to 5511 conditions per place. [2024-06-14 13:21:04,709 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 481 selfloop transitions, 113 changer transitions 0/597 dead transitions. [2024-06-14 13:21:04,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 597 transitions, 13225 flow [2024-06-14 13:21:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:21:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:21:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-14 13:21:04,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-14 13:21:04,729 INFO L175 Difference]: Start difference. First operand has 268 places, 538 transitions, 11045 flow. Second operand 10 states and 161 transitions. [2024-06-14 13:21:04,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 597 transitions, 13225 flow [2024-06-14 13:21:05,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 597 transitions, 13111 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:05,682 INFO L231 Difference]: Finished difference. Result has 274 places, 562 transitions, 11763 flow [2024-06-14 13:21:05,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10931, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11763, PETRI_PLACES=274, PETRI_TRANSITIONS=562} [2024-06-14 13:21:05,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-14 13:21:05,682 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 562 transitions, 11763 flow [2024-06-14 13:21:05,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:05,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:05,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:05,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:21:05,683 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)] === [2024-06-14 13:21:05,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash -635933489, now seen corresponding path program 6 times [2024-06-14 13:21:05,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:05,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496032173] [2024-06-14 13:21:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:05,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:06,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496032173] [2024-06-14 13:21:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496032173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:06,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:06,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667345746] [2024-06-14 13:21:06,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:06,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:06,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 562 transitions, 11763 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:06,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:06,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:06,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:07,962 INFO L124 PetriNetUnfolderBase]: 4213/6219 cut-off events. [2024-06-14 13:21:07,963 INFO L125 PetriNetUnfolderBase]: For 388606/388610 co-relation queries the response was YES. [2024-06-14 13:21:08,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60888 conditions, 6219 events. 4213/6219 cut-off events. For 388606/388610 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33107 event pairs, 1019 based on Foata normal form. 16/6234 useless extension candidates. Maximal degree in co-relation 60757. Up to 5495 conditions per place. [2024-06-14 13:21:08,048 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 478 selfloop transitions, 115 changer transitions 0/596 dead transitions. [2024-06-14 13:21:08,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 596 transitions, 13477 flow [2024-06-14 13:21:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:21:08,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-14 13:21:08,050 INFO L175 Difference]: Start difference. First operand has 274 places, 562 transitions, 11763 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:21:08,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 596 transitions, 13477 flow [2024-06-14 13:21:09,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 596 transitions, 13284 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:09,181 INFO L231 Difference]: Finished difference. Result has 278 places, 565 transitions, 11972 flow [2024-06-14 13:21:09,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11576, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11972, PETRI_PLACES=278, PETRI_TRANSITIONS=565} [2024-06-14 13:21:09,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-14 13:21:09,197 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 565 transitions, 11972 flow [2024-06-14 13:21:09,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:09,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:09,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:09,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:21:09,198 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)] === [2024-06-14 13:21:09,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:09,198 INFO L85 PathProgramCache]: Analyzing trace with hash 865313525, now seen corresponding path program 5 times [2024-06-14 13:21:09,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:09,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301572374] [2024-06-14 13:21:09,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:09,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:09,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:09,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301572374] [2024-06-14 13:21:09,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301572374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:09,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:09,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:09,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494958987] [2024-06-14 13:21:09,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:09,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:09,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:09,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:09,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:09,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:09,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 565 transitions, 11972 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:09,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:09,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:09,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:11,412 INFO L124 PetriNetUnfolderBase]: 4214/6230 cut-off events. [2024-06-14 13:21:11,413 INFO L125 PetriNetUnfolderBase]: For 378875/378875 co-relation queries the response was YES. [2024-06-14 13:21:11,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61090 conditions, 6230 events. 4214/6230 cut-off events. For 378875/378875 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33304 event pairs, 1276 based on Foata normal form. 5/6234 useless extension candidates. Maximal degree in co-relation 60957. Up to 6092 conditions per place. [2024-06-14 13:21:11,492 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 540 selfloop transitions, 48 changer transitions 0/591 dead transitions. [2024-06-14 13:21:11,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 591 transitions, 13509 flow [2024-06-14 13:21:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:11,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:21:11,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:21:11,494 INFO L175 Difference]: Start difference. First operand has 278 places, 565 transitions, 11972 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:21:11,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 591 transitions, 13509 flow [2024-06-14 13:21:12,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 591 transitions, 13341 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:12,552 INFO L231 Difference]: Finished difference. Result has 281 places, 570 transitions, 12063 flow [2024-06-14 13:21:12,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11804, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12063, PETRI_PLACES=281, PETRI_TRANSITIONS=570} [2024-06-14 13:21:12,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-14 13:21:12,552 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 570 transitions, 12063 flow [2024-06-14 13:21:12,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:12,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:12,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:12,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:21:12,553 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)] === [2024-06-14 13:21:12,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1830339487, now seen corresponding path program 6 times [2024-06-14 13:21:12,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:12,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243733514] [2024-06-14 13:21:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:12,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:13,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243733514] [2024-06-14 13:21:13,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243733514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:13,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:13,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:13,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97289705] [2024-06-14 13:21:13,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:13,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:13,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:13,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:13,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:13,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:13,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 570 transitions, 12063 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:13,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:13,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:13,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:14,810 INFO L124 PetriNetUnfolderBase]: 4208/6222 cut-off events. [2024-06-14 13:21:14,810 INFO L125 PetriNetUnfolderBase]: For 384515/384515 co-relation queries the response was YES. [2024-06-14 13:21:14,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60669 conditions, 6222 events. 4208/6222 cut-off events. For 384515/384515 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33241 event pairs, 1284 based on Foata normal form. 2/6223 useless extension candidates. Maximal degree in co-relation 60535. Up to 6142 conditions per place. [2024-06-14 13:21:14,907 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 558 selfloop transitions, 22 changer transitions 0/583 dead transitions. [2024-06-14 13:21:14,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 583 transitions, 13278 flow [2024-06-14 13:21:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-14 13:21:14,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-14 13:21:14,909 INFO L175 Difference]: Start difference. First operand has 281 places, 570 transitions, 12063 flow. Second operand 7 states and 104 transitions. [2024-06-14 13:21:14,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 583 transitions, 13278 flow [2024-06-14 13:21:16,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 583 transitions, 12728 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-14 13:21:16,097 INFO L231 Difference]: Finished difference. Result has 281 places, 570 transitions, 11565 flow [2024-06-14 13:21:16,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11513, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11565, PETRI_PLACES=281, PETRI_TRANSITIONS=570} [2024-06-14 13:21:16,098 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-14 13:21:16,098 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 570 transitions, 11565 flow [2024-06-14 13:21:16,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:16,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:16,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:16,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:21:16,098 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)] === [2024-06-14 13:21:16,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1239583199, now seen corresponding path program 7 times [2024-06-14 13:21:16,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:16,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454829588] [2024-06-14 13:21:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:16,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:16,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:16,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454829588] [2024-06-14 13:21:16,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454829588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:16,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:16,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:16,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319867360] [2024-06-14 13:21:16,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:16,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:16,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:16,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:16,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:16,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:16,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 570 transitions, 11565 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:16,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:16,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:16,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:18,124 INFO L124 PetriNetUnfolderBase]: 4202/6213 cut-off events. [2024-06-14 13:21:18,124 INFO L125 PetriNetUnfolderBase]: For 383122/383122 co-relation queries the response was YES. [2024-06-14 13:21:18,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60140 conditions, 6213 events. 4202/6213 cut-off events. For 383122/383122 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33165 event pairs, 1269 based on Foata normal form. 2/6214 useless extension candidates. Maximal degree in co-relation 60007. Up to 6110 conditions per place. [2024-06-14 13:21:18,207 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 555 selfloop transitions, 29 changer transitions 0/587 dead transitions. [2024-06-14 13:21:18,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 587 transitions, 12833 flow [2024-06-14 13:21:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:21:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:21:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:21:18,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-14 13:21:18,208 INFO L175 Difference]: Start difference. First operand has 281 places, 570 transitions, 11565 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:21:18,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 587 transitions, 12833 flow [2024-06-14 13:21:19,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 587 transitions, 12687 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 13:21:19,150 INFO L231 Difference]: Finished difference. Result has 281 places, 570 transitions, 11496 flow [2024-06-14 13:21:19,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11419, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11496, PETRI_PLACES=281, PETRI_TRANSITIONS=570} [2024-06-14 13:21:19,151 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-14 13:21:19,151 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 570 transitions, 11496 flow [2024-06-14 13:21:19,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:19,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:19,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:19,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:21:19,152 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)] === [2024-06-14 13:21:19,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:19,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1945596097, now seen corresponding path program 8 times [2024-06-14 13:21:19,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:19,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796649765] [2024-06-14 13:21:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:19,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:19,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:19,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796649765] [2024-06-14 13:21:19,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796649765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:19,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:19,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:21:19,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950239283] [2024-06-14 13:21:19,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:19,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:21:19,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:19,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:21:19,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:21:19,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:19,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 570 transitions, 11496 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:19,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:19,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:19,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:21,361 INFO L124 PetriNetUnfolderBase]: 4186/6184 cut-off events. [2024-06-14 13:21:21,362 INFO L125 PetriNetUnfolderBase]: For 392955/392975 co-relation queries the response was YES. [2024-06-14 13:21:21,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59919 conditions, 6184 events. 4186/6184 cut-off events. For 392955/392975 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32937 event pairs, 995 based on Foata normal form. 24/6207 useless extension candidates. Maximal degree in co-relation 59786. Up to 5813 conditions per place. [2024-06-14 13:21:21,449 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 510 selfloop transitions, 87 changer transitions 0/600 dead transitions. [2024-06-14 13:21:21,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 600 transitions, 12878 flow [2024-06-14 13:21:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:21:21,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 13:21:21,451 INFO L175 Difference]: Start difference. First operand has 281 places, 570 transitions, 11496 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:21:21,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 600 transitions, 12878 flow [2024-06-14 13:21:22,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 600 transitions, 12784 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:22,629 INFO L231 Difference]: Finished difference. Result has 283 places, 570 transitions, 11614 flow [2024-06-14 13:21:22,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11402, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11614, PETRI_PLACES=283, PETRI_TRANSITIONS=570} [2024-06-14 13:21:22,630 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-14 13:21:22,630 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 570 transitions, 11614 flow [2024-06-14 13:21:22,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:22,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:22,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:22,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:21:22,631 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)] === [2024-06-14 13:21:22,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:22,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1739679783, now seen corresponding path program 7 times [2024-06-14 13:21:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:22,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328709427] [2024-06-14 13:21:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:22,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:23,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:23,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328709427] [2024-06-14 13:21:23,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328709427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:23,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:23,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:23,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042845883] [2024-06-14 13:21:23,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:23,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:23,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:23,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:23,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:23,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:23,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 570 transitions, 11614 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:23,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:23,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:23,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:25,103 INFO L124 PetriNetUnfolderBase]: 4333/6391 cut-off events. [2024-06-14 13:21:25,103 INFO L125 PetriNetUnfolderBase]: For 429473/429477 co-relation queries the response was YES. [2024-06-14 13:21:25,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63064 conditions, 6391 events. 4333/6391 cut-off events. For 429473/429477 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 34163 event pairs, 890 based on Foata normal form. 13/6403 useless extension candidates. Maximal degree in co-relation 62930. Up to 5572 conditions per place. [2024-06-14 13:21:25,181 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 466 selfloop transitions, 160 changer transitions 0/629 dead transitions. [2024-06-14 13:21:25,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 629 transitions, 13625 flow [2024-06-14 13:21:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 13:21:25,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-14 13:21:25,183 INFO L175 Difference]: Start difference. First operand has 283 places, 570 transitions, 11614 flow. Second operand 8 states and 155 transitions. [2024-06-14 13:21:25,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 629 transitions, 13625 flow [2024-06-14 13:21:26,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 629 transitions, 13387 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:21:26,271 INFO L231 Difference]: Finished difference. Result has 286 places, 581 transitions, 12159 flow [2024-06-14 13:21:26,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11380, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12159, PETRI_PLACES=286, PETRI_TRANSITIONS=581} [2024-06-14 13:21:26,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-14 13:21:26,271 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 581 transitions, 12159 flow [2024-06-14 13:21:26,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:26,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:26,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:26,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:21:26,272 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)] === [2024-06-14 13:21:26,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1957983201, now seen corresponding path program 1 times [2024-06-14 13:21:26,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:26,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010850773] [2024-06-14 13:21:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:26,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:27,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:27,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010850773] [2024-06-14 13:21:27,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010850773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:27,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:27,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:27,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912715147] [2024-06-14 13:21:27,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:27,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:27,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:27,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:27,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:27,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:27,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 581 transitions, 12159 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:27,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:27,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:27,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:28,591 INFO L124 PetriNetUnfolderBase]: 4330/6393 cut-off events. [2024-06-14 13:21:28,592 INFO L125 PetriNetUnfolderBase]: For 428968/428968 co-relation queries the response was YES. [2024-06-14 13:21:28,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64124 conditions, 6393 events. 4330/6393 cut-off events. For 428968/428968 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34237 event pairs, 1298 based on Foata normal form. 1/6393 useless extension candidates. Maximal degree in co-relation 63988. Up to 6319 conditions per place. [2024-06-14 13:21:28,669 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 566 selfloop transitions, 21 changer transitions 0/590 dead transitions. [2024-06-14 13:21:28,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 590 transitions, 13366 flow [2024-06-14 13:21:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:21:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:21:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-14 13:21:28,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:21:28,670 INFO L175 Difference]: Start difference. First operand has 286 places, 581 transitions, 12159 flow. Second operand 6 states and 90 transitions. [2024-06-14 13:21:28,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 590 transitions, 13366 flow [2024-06-14 13:21:29,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 590 transitions, 13114 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:29,744 INFO L231 Difference]: Finished difference. Result has 287 places, 581 transitions, 11961 flow [2024-06-14 13:21:29,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11907, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11961, PETRI_PLACES=287, PETRI_TRANSITIONS=581} [2024-06-14 13:21:29,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-14 13:21:29,744 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 581 transitions, 11961 flow [2024-06-14 13:21:29,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:29,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:29,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:29,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:21:29,745 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)] === [2024-06-14 13:21:29,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:29,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1926000041, now seen corresponding path program 7 times [2024-06-14 13:21:29,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:29,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554289760] [2024-06-14 13:21:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:29,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:30,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:30,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554289760] [2024-06-14 13:21:30,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554289760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:30,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:30,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:30,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441572075] [2024-06-14 13:21:30,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:30,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:30,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:30,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:30,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:30,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:30,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 581 transitions, 11961 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:30,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:30,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:30,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:32,104 INFO L124 PetriNetUnfolderBase]: 4430/6526 cut-off events. [2024-06-14 13:21:32,104 INFO L125 PetriNetUnfolderBase]: For 456229/456233 co-relation queries the response was YES. [2024-06-14 13:21:32,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64785 conditions, 6526 events. 4430/6526 cut-off events. For 456229/456233 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34878 event pairs, 833 based on Foata normal form. 16/6541 useless extension candidates. Maximal degree in co-relation 64649. Up to 5518 conditions per place. [2024-06-14 13:21:32,197 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 470 selfloop transitions, 158 changer transitions 0/631 dead transitions. [2024-06-14 13:21:32,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 631 transitions, 13890 flow [2024-06-14 13:21:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:21:32,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-14 13:21:32,198 INFO L175 Difference]: Start difference. First operand has 287 places, 581 transitions, 11961 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:21:32,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 631 transitions, 13890 flow [2024-06-14 13:21:33,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 631 transitions, 13814 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:33,276 INFO L231 Difference]: Finished difference. Result has 292 places, 592 transitions, 12655 flow [2024-06-14 13:21:33,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11889, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12655, PETRI_PLACES=292, PETRI_TRANSITIONS=592} [2024-06-14 13:21:33,277 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-14 13:21:33,277 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 592 transitions, 12655 flow [2024-06-14 13:21:33,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:33,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:33,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:33,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:21:33,278 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)] === [2024-06-14 13:21:33,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:33,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1945948629, now seen corresponding path program 8 times [2024-06-14 13:21:33,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:33,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937192688] [2024-06-14 13:21:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:33,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:33,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:33,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937192688] [2024-06-14 13:21:33,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937192688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:33,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:33,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:33,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095123134] [2024-06-14 13:21:33,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:33,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:33,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:33,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:33,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 592 transitions, 12655 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:33,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:33,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:33,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:35,650 INFO L124 PetriNetUnfolderBase]: 4537/6682 cut-off events. [2024-06-14 13:21:35,651 INFO L125 PetriNetUnfolderBase]: For 479678/479678 co-relation queries the response was YES. [2024-06-14 13:21:35,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68371 conditions, 6682 events. 4537/6682 cut-off events. For 479678/479678 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35958 event pairs, 1311 based on Foata normal form. 6/6687 useless extension candidates. Maximal degree in co-relation 68232. Up to 6462 conditions per place. [2024-06-14 13:21:35,757 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 578 selfloop transitions, 46 changer transitions 0/627 dead transitions. [2024-06-14 13:21:35,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 627 transitions, 14407 flow [2024-06-14 13:21:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 13:21:35,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-14 13:21:35,773 INFO L175 Difference]: Start difference. First operand has 292 places, 592 transitions, 12655 flow. Second operand 9 states and 138 transitions. [2024-06-14 13:21:35,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 627 transitions, 14407 flow [2024-06-14 13:21:37,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 627 transitions, 14153 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:37,055 INFO L231 Difference]: Finished difference. Result has 299 places, 605 transitions, 12836 flow [2024-06-14 13:21:37,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12411, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12836, PETRI_PLACES=299, PETRI_TRANSITIONS=605} [2024-06-14 13:21:37,056 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-14 13:21:37,056 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 605 transitions, 12836 flow [2024-06-14 13:21:37,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:37,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:37,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:37,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:21:37,056 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)] === [2024-06-14 13:21:37,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1945602669, now seen corresponding path program 9 times [2024-06-14 13:21:37,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:37,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82840803] [2024-06-14 13:21:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:37,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:37,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82840803] [2024-06-14 13:21:37,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82840803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:37,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:37,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:21:37,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487089098] [2024-06-14 13:21:37,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:37,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:21:37,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:37,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:21:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:21:37,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:37,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 605 transitions, 12836 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:37,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:37,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:37,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:39,329 INFO L124 PetriNetUnfolderBase]: 4629/6802 cut-off events. [2024-06-14 13:21:39,330 INFO L125 PetriNetUnfolderBase]: For 503308/503327 co-relation queries the response was YES. [2024-06-14 13:21:39,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70604 conditions, 6802 events. 4629/6802 cut-off events. For 503308/503327 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 36453 event pairs, 804 based on Foata normal form. 24/6825 useless extension candidates. Maximal degree in co-relation 70462. Up to 5616 conditions per place. [2024-06-14 13:21:39,428 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 504 selfloop transitions, 144 changer transitions 0/651 dead transitions. [2024-06-14 13:21:39,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 651 transitions, 14867 flow [2024-06-14 13:21:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:21:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:21:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:21:39,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-14 13:21:39,430 INFO L175 Difference]: Start difference. First operand has 299 places, 605 transitions, 12836 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:21:39,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 651 transitions, 14867 flow [2024-06-14 13:21:40,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 651 transitions, 14728 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-14 13:21:40,682 INFO L231 Difference]: Finished difference. Result has 306 places, 617 transitions, 13469 flow [2024-06-14 13:21:40,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12697, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13469, PETRI_PLACES=306, PETRI_TRANSITIONS=617} [2024-06-14 13:21:40,683 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-14 13:21:40,683 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 617 transitions, 13469 flow [2024-06-14 13:21:40,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:40,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:40,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:40,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:21:40,684 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)] === [2024-06-14 13:21:40,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:40,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1830229313, now seen corresponding path program 1 times [2024-06-14 13:21:40,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:40,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454574491] [2024-06-14 13:21:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:40,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:41,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:41,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454574491] [2024-06-14 13:21:41,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454574491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:41,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:41,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:41,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590152472] [2024-06-14 13:21:41,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:41,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:41,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:41,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:41,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:41,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:41,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 617 transitions, 13469 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:41,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:41,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:41,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:43,191 INFO L124 PetriNetUnfolderBase]: 4637/6822 cut-off events. [2024-06-14 13:21:43,192 INFO L125 PetriNetUnfolderBase]: For 521308/521308 co-relation queries the response was YES. [2024-06-14 13:21:43,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72039 conditions, 6822 events. 4637/6822 cut-off events. For 521308/521308 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 36701 event pairs, 1302 based on Foata normal form. 2/6823 useless extension candidates. Maximal degree in co-relation 71894. Up to 6694 conditions per place. [2024-06-14 13:21:43,296 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 609 selfloop transitions, 27 changer transitions 0/639 dead transitions. [2024-06-14 13:21:43,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 639 transitions, 15005 flow [2024-06-14 13:21:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 13:21:43,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-14 13:21:43,298 INFO L175 Difference]: Start difference. First operand has 306 places, 617 transitions, 13469 flow. Second operand 7 states and 109 transitions. [2024-06-14 13:21:43,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 639 transitions, 15005 flow [2024-06-14 13:21:44,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 639 transitions, 14744 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:44,814 INFO L231 Difference]: Finished difference. Result has 309 places, 621 transitions, 13359 flow [2024-06-14 13:21:44,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13208, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13359, PETRI_PLACES=309, PETRI_TRANSITIONS=621} [2024-06-14 13:21:44,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-14 13:21:44,815 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 621 transitions, 13359 flow [2024-06-14 13:21:44,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:44,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:44,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:44,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:21:44,815 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)] === [2024-06-14 13:21:44,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 873000471, now seen corresponding path program 2 times [2024-06-14 13:21:44,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:44,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334963322] [2024-06-14 13:21:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:44,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:45,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:45,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334963322] [2024-06-14 13:21:45,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334963322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:45,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:45,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:45,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136685093] [2024-06-14 13:21:45,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:45,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:45,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:45,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:45,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 621 transitions, 13359 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:45,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:45,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:45,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:47,463 INFO L124 PetriNetUnfolderBase]: 4645/6834 cut-off events. [2024-06-14 13:21:47,463 INFO L125 PetriNetUnfolderBase]: For 532003/532003 co-relation queries the response was YES. [2024-06-14 13:21:47,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71413 conditions, 6834 events. 4645/6834 cut-off events. For 532003/532003 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 36886 event pairs, 1339 based on Foata normal form. 2/6835 useless extension candidates. Maximal degree in co-relation 71267. Up to 6737 conditions per place. [2024-06-14 13:21:47,565 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 608 selfloop transitions, 25 changer transitions 0/636 dead transitions. [2024-06-14 13:21:47,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 636 transitions, 14721 flow [2024-06-14 13:21:47,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:21:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:21:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-14 13:21:47,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:21:47,566 INFO L175 Difference]: Start difference. First operand has 309 places, 621 transitions, 13359 flow. Second operand 7 states and 105 transitions. [2024-06-14 13:21:47,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 636 transitions, 14721 flow [2024-06-14 13:21:49,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 636 transitions, 14605 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 13:21:49,061 INFO L231 Difference]: Finished difference. Result has 313 places, 623 transitions, 13350 flow [2024-06-14 13:21:49,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13269, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13350, PETRI_PLACES=313, PETRI_TRANSITIONS=623} [2024-06-14 13:21:49,062 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-14 13:21:49,062 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 623 transitions, 13350 flow [2024-06-14 13:21:49,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:49,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:49,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:49,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:21:49,062 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)] === [2024-06-14 13:21:49,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:49,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1951317953, now seen corresponding path program 3 times [2024-06-14 13:21:49,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:49,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632918103] [2024-06-14 13:21:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:49,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:49,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:49,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632918103] [2024-06-14 13:21:49,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632918103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:49,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:49,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:49,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884170661] [2024-06-14 13:21:49,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:49,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:49,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:49,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:49,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:21:49,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 623 transitions, 13350 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:49,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:49,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:21:49,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:51,640 INFO L124 PetriNetUnfolderBase]: 4640/6827 cut-off events. [2024-06-14 13:21:51,641 INFO L125 PetriNetUnfolderBase]: For 542227/542227 co-relation queries the response was YES. [2024-06-14 13:21:51,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71399 conditions, 6827 events. 4640/6827 cut-off events. For 542227/542227 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 36753 event pairs, 1301 based on Foata normal form. 2/6828 useless extension candidates. Maximal degree in co-relation 71251. Up to 6720 conditions per place. [2024-06-14 13:21:51,741 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 613 selfloop transitions, 22 changer transitions 0/638 dead transitions. [2024-06-14 13:21:51,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 638 transitions, 14682 flow [2024-06-14 13:21:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:21:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:21:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:21:51,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-14 13:21:51,742 INFO L175 Difference]: Start difference. First operand has 313 places, 623 transitions, 13350 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:21:51,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 638 transitions, 14682 flow [2024-06-14 13:21:53,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 638 transitions, 14609 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:53,456 INFO L231 Difference]: Finished difference. Result has 314 places, 623 transitions, 13329 flow [2024-06-14 13:21:53,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13277, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13329, PETRI_PLACES=314, PETRI_TRANSITIONS=623} [2024-06-14 13:21:53,457 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-14 13:21:53,457 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 623 transitions, 13329 flow [2024-06-14 13:21:53,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:53,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:53,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:53,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:21:53,458 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)] === [2024-06-14 13:21:53,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2039687003, now seen corresponding path program 1 times [2024-06-14 13:21:53,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:53,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740771803] [2024-06-14 13:21:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:53,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:54,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:54,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740771803] [2024-06-14 13:21:54,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740771803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:54,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:54,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:54,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370715251] [2024-06-14 13:21:54,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:54,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:54,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:54,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:54,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-14 13:21:54,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 623 transitions, 13329 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) [2024-06-14 13:21:54,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:54,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-14 13:21:54,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:56,288 INFO L124 PetriNetUnfolderBase]: 5211/7850 cut-off events. [2024-06-14 13:21:56,288 INFO L125 PetriNetUnfolderBase]: For 825770/825857 co-relation queries the response was YES. [2024-06-14 13:21:56,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81618 conditions, 7850 events. 5211/7850 cut-off events. For 825770/825857 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 45189 event pairs, 949 based on Foata normal form. 91/7861 useless extension candidates. Maximal degree in co-relation 81469. Up to 2381 conditions per place. [2024-06-14 13:21:56,400 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 250 selfloop transitions, 355 changer transitions 16/694 dead transitions. [2024-06-14 13:21:56,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 694 transitions, 15448 flow [2024-06-14 13:21:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 13:21:56,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-14 13:21:56,401 INFO L175 Difference]: Start difference. First operand has 314 places, 623 transitions, 13329 flow. Second operand 9 states and 185 transitions. [2024-06-14 13:21:56,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 694 transitions, 15448 flow [2024-06-14 13:21:58,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 694 transitions, 15397 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:58,704 INFO L231 Difference]: Finished difference. Result has 320 places, 628 transitions, 14237 flow [2024-06-14 13:21:58,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13278, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14237, PETRI_PLACES=320, PETRI_TRANSITIONS=628} [2024-06-14 13:21:58,705 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-14 13:21:58,705 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 628 transitions, 14237 flow [2024-06-14 13:21:58,705 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) [2024-06-14 13:21:58,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:58,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:58,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:21:58,706 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)] === [2024-06-14 13:21:58,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:58,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1475522183, now seen corresponding path program 2 times [2024-06-14 13:21:58,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:58,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332071159] [2024-06-14 13:21:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:59,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:59,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332071159] [2024-06-14 13:21:59,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332071159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:59,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:59,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:59,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314240432] [2024-06-14 13:21:59,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:59,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:59,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-14 13:21:59,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 628 transitions, 14237 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) [2024-06-14 13:21:59,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:59,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-14 13:21:59,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:01,869 INFO L124 PetriNetUnfolderBase]: 5952/9046 cut-off events. [2024-06-14 13:22:01,870 INFO L125 PetriNetUnfolderBase]: For 1022379/1022456 co-relation queries the response was YES. [2024-06-14 13:22:01,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95524 conditions, 9046 events. 5952/9046 cut-off events. For 1022379/1022456 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 53971 event pairs, 1355 based on Foata normal form. 91/9035 useless extension candidates. Maximal degree in co-relation 95372. Up to 4553 conditions per place. [2024-06-14 13:22:02,002 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 260 selfloop transitions, 353 changer transitions 19/705 dead transitions. [2024-06-14 13:22:02,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 705 transitions, 16593 flow [2024-06-14 13:22:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 13:22:02,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-14 13:22:02,004 INFO L175 Difference]: Start difference. First operand has 320 places, 628 transitions, 14237 flow. Second operand 9 states and 186 transitions. [2024-06-14 13:22:02,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 705 transitions, 16593 flow [2024-06-14 13:22:05,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 705 transitions, 16090 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:05,183 INFO L231 Difference]: Finished difference. Result has 325 places, 626 transitions, 14298 flow [2024-06-14 13:22:05,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13746, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14298, PETRI_PLACES=325, PETRI_TRANSITIONS=626} [2024-06-14 13:22:05,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-14 13:22:05,184 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 626 transitions, 14298 flow [2024-06-14 13:22:05,185 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) [2024-06-14 13:22:05,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:05,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:05,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:22:05,185 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)] === [2024-06-14 13:22:05,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:05,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2052191429, now seen corresponding path program 3 times [2024-06-14 13:22:05,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:05,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606408496] [2024-06-14 13:22:05,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:05,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:05,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:05,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606408496] [2024-06-14 13:22:05,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606408496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:05,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:05,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:05,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918915156] [2024-06-14 13:22:05,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:05,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:05,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:05,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-14 13:22:05,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 626 transitions, 14298 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) [2024-06-14 13:22:05,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:05,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-14 13:22:05,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:08,234 INFO L124 PetriNetUnfolderBase]: 5602/8536 cut-off events. [2024-06-14 13:22:08,235 INFO L125 PetriNetUnfolderBase]: For 922398/922470 co-relation queries the response was YES. [2024-06-14 13:22:08,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89645 conditions, 8536 events. 5602/8536 cut-off events. For 922398/922470 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 50560 event pairs, 1303 based on Foata normal form. 95/8569 useless extension candidates. Maximal degree in co-relation 89491. Up to 4873 conditions per place. [2024-06-14 13:22:08,364 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 239 selfloop transitions, 336 changer transitions 30/678 dead transitions. [2024-06-14 13:22:08,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 678 transitions, 16193 flow [2024-06-14 13:22:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:22:08,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-14 13:22:08,365 INFO L175 Difference]: Start difference. First operand has 325 places, 626 transitions, 14298 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:22:08,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 678 transitions, 16193 flow [2024-06-14 13:22:10,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 678 transitions, 15696 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:10,885 INFO L231 Difference]: Finished difference. Result has 329 places, 607 transitions, 14050 flow [2024-06-14 13:22:10,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13801, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14050, PETRI_PLACES=329, PETRI_TRANSITIONS=607} [2024-06-14 13:22:10,886 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-14 13:22:10,886 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 607 transitions, 14050 flow [2024-06-14 13:22:10,886 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) [2024-06-14 13:22:10,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:10,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:10,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:22:10,886 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)] === [2024-06-14 13:22:10,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1744443353, now seen corresponding path program 1 times [2024-06-14 13:22:10,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:10,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775989530] [2024-06-14 13:22:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:10,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:11,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:11,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775989530] [2024-06-14 13:22:11,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775989530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:11,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:11,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079475206] [2024-06-14 13:22:11,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:11,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:11,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:11,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:11,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:22:11,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 607 transitions, 14050 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:11,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:11,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:22:11,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:13,838 INFO L124 PetriNetUnfolderBase]: 5784/8710 cut-off events. [2024-06-14 13:22:13,839 INFO L125 PetriNetUnfolderBase]: For 774544/774550 co-relation queries the response was YES. [2024-06-14 13:22:13,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91604 conditions, 8710 events. 5784/8710 cut-off events. For 774544/774550 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 50519 event pairs, 1847 based on Foata normal form. 8/8717 useless extension candidates. Maximal degree in co-relation 91448. Up to 8328 conditions per place. [2024-06-14 13:22:13,971 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 536 selfloop transitions, 107 changer transitions 2/648 dead transitions. [2024-06-14 13:22:13,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 648 transitions, 16048 flow [2024-06-14 13:22:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:13,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:22:13,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-14 13:22:13,972 INFO L175 Difference]: Start difference. First operand has 329 places, 607 transitions, 14050 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:22:13,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 648 transitions, 16048 flow [2024-06-14 13:22:16,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 648 transitions, 15588 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 13:22:16,773 INFO L231 Difference]: Finished difference. Result has 333 places, 613 transitions, 14021 flow [2024-06-14 13:22:16,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13592, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14021, PETRI_PLACES=333, PETRI_TRANSITIONS=613} [2024-06-14 13:22:16,774 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-14 13:22:16,774 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 613 transitions, 14021 flow [2024-06-14 13:22:16,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:16,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:16,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:16,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:22:16,774 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)] === [2024-06-14 13:22:16,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:16,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1526260427, now seen corresponding path program 2 times [2024-06-14 13:22:16,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:16,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489508746] [2024-06-14 13:22:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:16,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:17,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:17,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489508746] [2024-06-14 13:22:17,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489508746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:17,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:17,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437349027] [2024-06-14 13:22:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:17,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:17,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:17,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:22:17,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 613 transitions, 14021 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:17,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:17,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:22:17,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:19,779 INFO L124 PetriNetUnfolderBase]: 5788/8719 cut-off events. [2024-06-14 13:22:19,780 INFO L125 PetriNetUnfolderBase]: For 781577/781583 co-relation queries the response was YES. [2024-06-14 13:22:19,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90919 conditions, 8719 events. 5788/8719 cut-off events. For 781577/781583 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 50589 event pairs, 1900 based on Foata normal form. 8/8726 useless extension candidates. Maximal degree in co-relation 90761. Up to 8221 conditions per place. [2024-06-14 13:22:19,914 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 515 selfloop transitions, 132 changer transitions 4/654 dead transitions. [2024-06-14 13:22:19,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 654 transitions, 16010 flow [2024-06-14 13:22:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:22:19,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-14 13:22:19,915 INFO L175 Difference]: Start difference. First operand has 333 places, 613 transitions, 14021 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:22:19,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 654 transitions, 16010 flow [2024-06-14 13:22:22,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 654 transitions, 15754 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 13:22:22,708 INFO L231 Difference]: Finished difference. Result has 336 places, 618 transitions, 14189 flow [2024-06-14 13:22:22,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13815, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14189, PETRI_PLACES=336, PETRI_TRANSITIONS=618} [2024-06-14 13:22:22,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-14 13:22:22,708 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 618 transitions, 14189 flow [2024-06-14 13:22:22,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:22,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:22,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:22,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:22:22,709 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)] === [2024-06-14 13:22:22,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash 345476380, now seen corresponding path program 1 times [2024-06-14 13:22:22,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:22,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144135309] [2024-06-14 13:22:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:22,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:23,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:23,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144135309] [2024-06-14 13:22:23,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144135309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:23,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:23,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:23,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667465429] [2024-06-14 13:22:23,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:23,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:23,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:23,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:23,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:23,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:22:23,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 618 transitions, 14189 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:23,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:23,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:22:23,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:25,798 INFO L124 PetriNetUnfolderBase]: 5998/9006 cut-off events. [2024-06-14 13:22:25,798 INFO L125 PetriNetUnfolderBase]: For 865347/865378 co-relation queries the response was YES. [2024-06-14 13:22:25,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95060 conditions, 9006 events. 5998/9006 cut-off events. For 865347/865378 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 52010 event pairs, 1574 based on Foata normal form. 40/9045 useless extension candidates. Maximal degree in co-relation 94901. Up to 5738 conditions per place. [2024-06-14 13:22:25,953 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 402 selfloop transitions, 292 changer transitions 0/697 dead transitions. [2024-06-14 13:22:25,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 697 transitions, 17109 flow [2024-06-14 13:22:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:22:25,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-14 13:22:25,955 INFO L175 Difference]: Start difference. First operand has 336 places, 618 transitions, 14189 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:22:25,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 697 transitions, 17109 flow [2024-06-14 13:22:29,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 697 transitions, 16779 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 13:22:29,472 INFO L231 Difference]: Finished difference. Result has 339 places, 637 transitions, 14952 flow [2024-06-14 13:22:29,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13859, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14952, PETRI_PLACES=339, PETRI_TRANSITIONS=637} [2024-06-14 13:22:29,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-14 13:22:29,473 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 637 transitions, 14952 flow [2024-06-14 13:22:29,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:29,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:29,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:29,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:22:29,473 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)] === [2024-06-14 13:22:29,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:29,474 INFO L85 PathProgramCache]: Analyzing trace with hash 776269545, now seen corresponding path program 3 times [2024-06-14 13:22:29,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:29,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948096365] [2024-06-14 13:22:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:29,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:30,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:30,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948096365] [2024-06-14 13:22:30,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948096365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:30,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:30,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:30,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507332930] [2024-06-14 13:22:30,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:30,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:30,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:30,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:30,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:30,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:22:30,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 637 transitions, 14952 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:30,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:30,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:22:30,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:32,454 INFO L124 PetriNetUnfolderBase]: 6008/9022 cut-off events. [2024-06-14 13:22:32,454 INFO L125 PetriNetUnfolderBase]: For 880722/880744 co-relation queries the response was YES. [2024-06-14 13:22:32,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97465 conditions, 9022 events. 6008/9022 cut-off events. For 880722/880744 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 52330 event pairs, 1959 based on Foata normal form. 24/9045 useless extension candidates. Maximal degree in co-relation 97304. Up to 8523 conditions per place. [2024-06-14 13:22:32,597 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 541 selfloop transitions, 130 changer transitions 2/676 dead transitions. [2024-06-14 13:22:32,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 676 transitions, 16961 flow [2024-06-14 13:22:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:22:32,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:22:32,599 INFO L175 Difference]: Start difference. First operand has 339 places, 637 transitions, 14952 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:22:32,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 676 transitions, 16961 flow [2024-06-14 13:22:36,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 676 transitions, 16447 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:36,295 INFO L231 Difference]: Finished difference. Result has 344 places, 642 transitions, 14837 flow [2024-06-14 13:22:36,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14439, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14837, PETRI_PLACES=344, PETRI_TRANSITIONS=642} [2024-06-14 13:22:36,296 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-14 13:22:36,296 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 642 transitions, 14837 flow [2024-06-14 13:22:36,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:36,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:36,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:36,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:22:36,296 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)] === [2024-06-14 13:22:36,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash 912985466, now seen corresponding path program 2 times [2024-06-14 13:22:36,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:36,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015361618] [2024-06-14 13:22:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:36,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:36,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:36,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015361618] [2024-06-14 13:22:36,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015361618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:36,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:36,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:36,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907422318] [2024-06-14 13:22:36,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:36,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:36,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:37,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:22:37,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 642 transitions, 14837 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:37,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:37,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:22:37,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:39,366 INFO L124 PetriNetUnfolderBase]: 6068/9108 cut-off events. [2024-06-14 13:22:39,366 INFO L125 PetriNetUnfolderBase]: For 914589/914593 co-relation queries the response was YES. [2024-06-14 13:22:39,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97032 conditions, 9108 events. 6068/9108 cut-off events. For 914589/914593 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 52805 event pairs, 1996 based on Foata normal form. 16/9123 useless extension candidates. Maximal degree in co-relation 96870. Up to 8622 conditions per place. [2024-06-14 13:22:39,509 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 590 selfloop transitions, 88 changer transitions 0/681 dead transitions. [2024-06-14 13:22:39,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 681 transitions, 16797 flow [2024-06-14 13:22:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:22:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:22:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-14 13:22:39,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:22:39,511 INFO L175 Difference]: Start difference. First operand has 344 places, 642 transitions, 14837 flow. Second operand 11 states and 176 transitions. [2024-06-14 13:22:39,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 681 transitions, 16797 flow [2024-06-14 13:22:43,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 681 transitions, 16495 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:22:43,670 INFO L231 Difference]: Finished difference. Result has 348 places, 649 transitions, 14912 flow [2024-06-14 13:22:43,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14535, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14912, PETRI_PLACES=348, PETRI_TRANSITIONS=649} [2024-06-14 13:22:43,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-14 13:22:43,671 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 649 transitions, 14912 flow [2024-06-14 13:22:43,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:43,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:43,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:43,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:22:43,672 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)] === [2024-06-14 13:22:43,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:43,673 INFO L85 PathProgramCache]: Analyzing trace with hash -278564014, now seen corresponding path program 3 times [2024-06-14 13:22:43,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:43,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212325966] [2024-06-14 13:22:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:43,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:44,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212325966] [2024-06-14 13:22:44,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212325966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:44,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:44,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:44,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929455705] [2024-06-14 13:22:44,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:44,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:44,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:44,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:44,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:22:44,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 649 transitions, 14912 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:44,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:44,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:22:44,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:46,800 INFO L124 PetriNetUnfolderBase]: 6024/9048 cut-off events. [2024-06-14 13:22:46,800 INFO L125 PetriNetUnfolderBase]: For 914728/914732 co-relation queries the response was YES. [2024-06-14 13:22:46,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95933 conditions, 9048 events. 6024/9048 cut-off events. For 914728/914732 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 52456 event pairs, 2016 based on Foata normal form. 16/9063 useless extension candidates. Maximal degree in co-relation 95770. Up to 8602 conditions per place. [2024-06-14 13:22:47,175 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 589 selfloop transitions, 87 changer transitions 0/679 dead transitions. [2024-06-14 13:22:47,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 679 transitions, 16552 flow [2024-06-14 13:22:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:22:47,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:22:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:22:47,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-14 13:22:47,177 INFO L175 Difference]: Start difference. First operand has 348 places, 649 transitions, 14912 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:22:47,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 679 transitions, 16552 flow [2024-06-14 13:22:50,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 679 transitions, 16353 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 13:22:50,117 INFO L231 Difference]: Finished difference. Result has 350 places, 649 transitions, 14899 flow [2024-06-14 13:22:50,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14713, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14899, PETRI_PLACES=350, PETRI_TRANSITIONS=649} [2024-06-14 13:22:50,117 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-14 13:22:50,117 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 649 transitions, 14899 flow [2024-06-14 13:22:50,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:50,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:50,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:50,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:22:50,118 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)] === [2024-06-14 13:22:50,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash 2037381573, now seen corresponding path program 4 times [2024-06-14 13:22:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:50,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179831360] [2024-06-14 13:22:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:50,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:51,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:51,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179831360] [2024-06-14 13:22:51,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179831360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:51,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:51,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:22:51,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766495303] [2024-06-14 13:22:51,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:51,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:22:51,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:51,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:22:51,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:22:51,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:22:51,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 649 transitions, 14899 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:51,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:51,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:22:51,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:54,025 INFO L124 PetriNetUnfolderBase]: 6490/9798 cut-off events. [2024-06-14 13:22:54,026 INFO L125 PetriNetUnfolderBase]: For 992302/992308 co-relation queries the response was YES. [2024-06-14 13:22:54,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102451 conditions, 9798 events. 6490/9798 cut-off events. For 992302/992308 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 58436 event pairs, 1937 based on Foata normal form. 20/9817 useless extension candidates. Maximal degree in co-relation 102287. Up to 8486 conditions per place. [2024-06-14 13:22:54,169 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 540 selfloop transitions, 173 changer transitions 3/719 dead transitions. [2024-06-14 13:22:54,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 719 transitions, 17603 flow [2024-06-14 13:22:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:22:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:22:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 13:22:54,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-14 13:22:54,170 INFO L175 Difference]: Start difference. First operand has 350 places, 649 transitions, 14899 flow. Second operand 10 states and 183 transitions. [2024-06-14 13:22:54,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 719 transitions, 17603 flow [2024-06-14 13:22:57,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 719 transitions, 17381 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 13:22:57,548 INFO L231 Difference]: Finished difference. Result has 351 places, 663 transitions, 15390 flow [2024-06-14 13:22:57,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14677, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15390, PETRI_PLACES=351, PETRI_TRANSITIONS=663} [2024-06-14 13:22:57,549 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-14 13:22:57,549 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 663 transitions, 15390 flow [2024-06-14 13:22:57,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:57,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:57,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:57,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:22:57,550 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)] === [2024-06-14 13:22:57,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:57,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2037590823, now seen corresponding path program 5 times [2024-06-14 13:22:57,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:57,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529854687] [2024-06-14 13:22:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:57,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:58,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:58,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529854687] [2024-06-14 13:22:58,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529854687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:58,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:58,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:22:58,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590747902] [2024-06-14 13:22:58,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:58,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:22:58,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:58,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:22:58,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:22:58,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:22:58,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 663 transitions, 15390 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:58,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:58,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:22:58,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:01,576 INFO L124 PetriNetUnfolderBase]: 6542/9882 cut-off events. [2024-06-14 13:23:01,577 INFO L125 PetriNetUnfolderBase]: For 1026514/1026520 co-relation queries the response was YES. [2024-06-14 13:23:01,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104690 conditions, 9882 events. 6542/9882 cut-off events. For 1026514/1026520 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 59037 event pairs, 2111 based on Foata normal form. 20/9901 useless extension candidates. Maximal degree in co-relation 104524. Up to 9124 conditions per place. [2024-06-14 13:23:01,735 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 540 selfloop transitions, 166 changer transitions 4/713 dead transitions. [2024-06-14 13:23:01,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 713 transitions, 17658 flow [2024-06-14 13:23:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:23:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:23:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-14 13:23:01,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 13:23:01,737 INFO L175 Difference]: Start difference. First operand has 351 places, 663 transitions, 15390 flow. Second operand 11 states and 187 transitions. [2024-06-14 13:23:01,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 713 transitions, 17658 flow [2024-06-14 13:23:05,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 713 transitions, 17358 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:05,796 INFO L231 Difference]: Finished difference. Result has 356 places, 665 transitions, 15503 flow [2024-06-14 13:23:05,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15110, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15503, PETRI_PLACES=356, PETRI_TRANSITIONS=665} [2024-06-14 13:23:05,797 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-14 13:23:05,798 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 665 transitions, 15503 flow [2024-06-14 13:23:05,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:05,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:05,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:05,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:23:05,798 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)] === [2024-06-14 13:23:05,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:05,799 INFO L85 PathProgramCache]: Analyzing trace with hash 912993402, now seen corresponding path program 1 times [2024-06-14 13:23:05,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:05,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078387554] [2024-06-14 13:23:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:05,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:06,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:06,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078387554] [2024-06-14 13:23:06,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078387554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:06,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:06,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:06,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514622608] [2024-06-14 13:23:06,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:06,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:06,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:06,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:06,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:06,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:23:06,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 665 transitions, 15503 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:06,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:06,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:23:06,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:09,679 INFO L124 PetriNetUnfolderBase]: 6550/9884 cut-off events. [2024-06-14 13:23:09,680 INFO L125 PetriNetUnfolderBase]: For 1005177/1005181 co-relation queries the response was YES. [2024-06-14 13:23:09,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104034 conditions, 9884 events. 6550/9884 cut-off events. For 1005177/1005181 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 58946 event pairs, 2198 based on Foata normal form. 6/9889 useless extension candidates. Maximal degree in co-relation 103866. Up to 9735 conditions per place. [2024-06-14 13:23:09,818 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 636 selfloop transitions, 49 changer transitions 0/688 dead transitions. [2024-06-14 13:23:09,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 688 transitions, 16995 flow [2024-06-14 13:23:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 13:23:09,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-14 13:23:09,820 INFO L175 Difference]: Start difference. First operand has 356 places, 665 transitions, 15503 flow. Second operand 9 states and 137 transitions. [2024-06-14 13:23:09,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 688 transitions, 16995 flow [2024-06-14 13:23:12,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 688 transitions, 16689 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:23:12,950 INFO L231 Difference]: Finished difference. Result has 358 places, 667 transitions, 15346 flow [2024-06-14 13:23:12,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15197, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15346, PETRI_PLACES=358, PETRI_TRANSITIONS=667} [2024-06-14 13:23:12,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-14 13:23:12,951 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 667 transitions, 15346 flow [2024-06-14 13:23:12,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:12,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:12,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:12,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:23:12,955 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)] === [2024-06-14 13:23:12,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:12,955 INFO L85 PathProgramCache]: Analyzing trace with hash -278687301, now seen corresponding path program 6 times [2024-06-14 13:23:12,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:12,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260468085] [2024-06-14 13:23:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:12,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:13,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:13,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260468085] [2024-06-14 13:23:13,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260468085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:13,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:13,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:23:13,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924111362] [2024-06-14 13:23:13,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:13,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:23:13,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:23:13,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:23:14,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:23:14,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 667 transitions, 15346 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:14,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:14,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:23:14,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:17,026 INFO L124 PetriNetUnfolderBase]: 6589/9945 cut-off events. [2024-06-14 13:23:17,027 INFO L125 PetriNetUnfolderBase]: For 1055162/1055166 co-relation queries the response was YES. [2024-06-14 13:23:17,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104081 conditions, 9945 events. 6589/9945 cut-off events. For 1055162/1055166 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 59372 event pairs, 2270 based on Foata normal form. 18/9962 useless extension candidates. Maximal degree in co-relation 103912. Up to 9743 conditions per place. [2024-06-14 13:23:17,181 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 652 selfloop transitions, 43 changer transitions 0/698 dead transitions. [2024-06-14 13:23:17,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 698 transitions, 16919 flow [2024-06-14 13:23:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:23:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:23:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 165 transitions. [2024-06-14 13:23:17,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:23:17,183 INFO L175 Difference]: Start difference. First operand has 358 places, 667 transitions, 15346 flow. Second operand 11 states and 165 transitions. [2024-06-14 13:23:17,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 698 transitions, 16919 flow [2024-06-14 13:23:20,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 698 transitions, 16786 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 13:23:20,536 INFO L231 Difference]: Finished difference. Result has 362 places, 668 transitions, 15327 flow [2024-06-14 13:23:20,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15213, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15327, PETRI_PLACES=362, PETRI_TRANSITIONS=668} [2024-06-14 13:23:20,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-14 13:23:20,537 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 668 transitions, 15327 flow [2024-06-14 13:23:20,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:20,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:20,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:20,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:23:20,538 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)] === [2024-06-14 13:23:20,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:20,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2038090361, now seen corresponding path program 7 times [2024-06-14 13:23:20,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:20,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545654701] [2024-06-14 13:23:20,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:20,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:21,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:21,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545654701] [2024-06-14 13:23:21,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545654701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:21,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:21,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:21,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933753490] [2024-06-14 13:23:21,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:21,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:21,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:21,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:21,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:23:21,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 668 transitions, 15327 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:21,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:21,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:23:21,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:24,961 INFO L124 PetriNetUnfolderBase]: 7442/11339 cut-off events. [2024-06-14 13:23:24,962 INFO L125 PetriNetUnfolderBase]: For 1256372/1256396 co-relation queries the response was YES. [2024-06-14 13:23:25,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116196 conditions, 11339 events. 7442/11339 cut-off events. For 1256372/1256396 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 70170 event pairs, 1618 based on Foata normal form. 32/11370 useless extension candidates. Maximal degree in co-relation 116026. Up to 6510 conditions per place. [2024-06-14 13:23:25,119 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 345 selfloop transitions, 393 changer transitions 5/746 dead transitions. [2024-06-14 13:23:25,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 746 transitions, 18227 flow [2024-06-14 13:23:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 13:23:25,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-14 13:23:25,120 INFO L175 Difference]: Start difference. First operand has 362 places, 668 transitions, 15327 flow. Second operand 9 states and 178 transitions. [2024-06-14 13:23:25,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 746 transitions, 18227 flow [2024-06-14 13:23:29,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 746 transitions, 18128 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:23:29,099 INFO L231 Difference]: Finished difference. Result has 365 places, 683 transitions, 16485 flow [2024-06-14 13:23:29,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15237, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16485, PETRI_PLACES=365, PETRI_TRANSITIONS=683} [2024-06-14 13:23:29,100 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-14 13:23:29,100 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 683 transitions, 16485 flow [2024-06-14 13:23:29,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:29,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:29,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:29,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:23:29,101 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)] === [2024-06-14 13:23:29,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1495192481, now seen corresponding path program 8 times [2024-06-14 13:23:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:29,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547822693] [2024-06-14 13:23:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:29,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:29,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:29,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547822693] [2024-06-14 13:23:29,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547822693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:29,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:29,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:29,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516047263] [2024-06-14 13:23:29,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:29,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:29,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:29,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:29,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:30,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:23:30,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 683 transitions, 16485 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:30,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:30,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:23:30,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:33,558 INFO L124 PetriNetUnfolderBase]: 7538/11484 cut-off events. [2024-06-14 13:23:33,558 INFO L125 PetriNetUnfolderBase]: For 1310053/1310081 co-relation queries the response was YES. [2024-06-14 13:23:33,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121334 conditions, 11484 events. 7538/11484 cut-off events. For 1310053/1310081 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 71484 event pairs, 2104 based on Foata normal form. 36/11519 useless extension candidates. Maximal degree in co-relation 121162. Up to 8879 conditions per place. [2024-06-14 13:23:33,745 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 360 selfloop transitions, 373 changer transitions 2/738 dead transitions. [2024-06-14 13:23:33,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 738 transitions, 18932 flow [2024-06-14 13:23:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:33,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:23:33,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 13:23:33,747 INFO L175 Difference]: Start difference. First operand has 365 places, 683 transitions, 16485 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:23:33,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 738 transitions, 18932 flow [2024-06-14 13:23:38,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 738 transitions, 18280 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-14 13:23:38,420 INFO L231 Difference]: Finished difference. Result has 369 places, 689 transitions, 16766 flow [2024-06-14 13:23:38,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15863, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16766, PETRI_PLACES=369, PETRI_TRANSITIONS=689} [2024-06-14 13:23:38,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-14 13:23:38,421 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 689 transitions, 16766 flow [2024-06-14 13:23:38,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:38,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:38,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:38,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:23:38,422 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)] === [2024-06-14 13:23:38,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1502604767, now seen corresponding path program 4 times [2024-06-14 13:23:38,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:38,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508932310] [2024-06-14 13:23:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:38,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:39,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:39,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508932310] [2024-06-14 13:23:39,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508932310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:39,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:39,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:39,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310737177] [2024-06-14 13:23:39,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:39,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:39,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:39,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:23:39,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 689 transitions, 16766 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:39,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:39,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:23:39,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:42,605 INFO L124 PetriNetUnfolderBase]: 7532/11479 cut-off events. [2024-06-14 13:23:42,606 INFO L125 PetriNetUnfolderBase]: For 1292123/1292129 co-relation queries the response was YES. [2024-06-14 13:23:42,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120813 conditions, 11479 events. 7532/11479 cut-off events. For 1292123/1292129 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 71380 event pairs, 2578 based on Foata normal form. 8/11486 useless extension candidates. Maximal degree in co-relation 120639. Up to 10825 conditions per place. [2024-06-14 13:23:42,773 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 504 selfloop transitions, 207 changer transitions 3/717 dead transitions. [2024-06-14 13:23:42,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 717 transitions, 18497 flow [2024-06-14 13:23:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:23:42,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-14 13:23:42,775 INFO L175 Difference]: Start difference. First operand has 369 places, 689 transitions, 16766 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:23:42,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 717 transitions, 18497 flow [2024-06-14 13:23:47,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 717 transitions, 17813 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:47,840 INFO L231 Difference]: Finished difference. Result has 371 places, 689 transitions, 16522 flow [2024-06-14 13:23:47,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16082, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16522, PETRI_PLACES=371, PETRI_TRANSITIONS=689} [2024-06-14 13:23:47,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-14 13:23:47,841 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 689 transitions, 16522 flow [2024-06-14 13:23:47,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:47,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:47,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:47,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:23:47,842 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)] === [2024-06-14 13:23:47,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:47,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2045708921, now seen corresponding path program 9 times [2024-06-14 13:23:47,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:47,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972068902] [2024-06-14 13:23:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:47,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:48,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:48,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972068902] [2024-06-14 13:23:48,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972068902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:48,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:48,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:48,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341170413] [2024-06-14 13:23:48,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:48,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:48,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:48,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:23:48,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 689 transitions, 16522 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:48,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:48,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:23:48,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:52,270 INFO L124 PetriNetUnfolderBase]: 7586/11561 cut-off events. [2024-06-14 13:23:52,270 INFO L125 PetriNetUnfolderBase]: For 1338805/1338811 co-relation queries the response was YES. [2024-06-14 13:23:52,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120422 conditions, 11561 events. 7586/11561 cut-off events. For 1338805/1338811 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 72016 event pairs, 2578 based on Foata normal form. 18/11578 useless extension candidates. Maximal degree in co-relation 120247. Up to 10684 conditions per place. [2024-06-14 13:23:52,437 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 500 selfloop transitions, 228 changer transitions 3/734 dead transitions. [2024-06-14 13:23:52,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 734 transitions, 18602 flow [2024-06-14 13:23:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:23:52,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:23:52,439 INFO L175 Difference]: Start difference. First operand has 371 places, 689 transitions, 16522 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:23:52,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 734 transitions, 18602 flow [2024-06-14 13:23:57,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 734 transitions, 18005 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-14 13:23:57,158 INFO L231 Difference]: Finished difference. Result has 371 places, 701 transitions, 16724 flow [2024-06-14 13:23:57,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15929, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16724, PETRI_PLACES=371, PETRI_TRANSITIONS=701} [2024-06-14 13:23:57,159 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-14 13:23:57,159 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 701 transitions, 16724 flow [2024-06-14 13:23:57,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:57,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:57,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:57,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:23:57,160 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)] === [2024-06-14 13:23:57,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:57,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2138456718, now seen corresponding path program 4 times [2024-06-14 13:23:57,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:57,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389060492] [2024-06-14 13:23:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:57,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:58,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389060492] [2024-06-14 13:23:58,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389060492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:58,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:58,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:58,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957595023] [2024-06-14 13:23:58,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:58,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:58,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:58,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:23:58,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 701 transitions, 16724 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:58,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:58,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:23:58,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:01,548 INFO L124 PetriNetUnfolderBase]: 7818/11879 cut-off events. [2024-06-14 13:24:01,548 INFO L125 PetriNetUnfolderBase]: For 1386548/1386604 co-relation queries the response was YES. [2024-06-14 13:24:01,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124673 conditions, 11879 events. 7818/11879 cut-off events. For 1386548/1386604 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 73972 event pairs, 1966 based on Foata normal form. 76/11954 useless extension candidates. Maximal degree in co-relation 124499. Up to 8387 conditions per place. [2024-06-14 13:24:01,719 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 390 selfloop transitions, 377 changer transitions 0/770 dead transitions. [2024-06-14 13:24:01,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 770 transitions, 19813 flow [2024-06-14 13:24:01,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:24:01,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-14 13:24:01,720 INFO L175 Difference]: Start difference. First operand has 371 places, 701 transitions, 16724 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:24:01,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 770 transitions, 19813 flow [2024-06-14 13:24:06,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 770 transitions, 19352 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:24:06,895 INFO L231 Difference]: Finished difference. Result has 375 places, 729 transitions, 17995 flow [2024-06-14 13:24:06,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16263, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17995, PETRI_PLACES=375, PETRI_TRANSITIONS=729} [2024-06-14 13:24:06,895 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-14 13:24:06,896 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 729 transitions, 17995 flow [2024-06-14 13:24:06,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:06,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:06,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:06,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:24:06,896 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)] === [2024-06-14 13:24:06,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2138457059, now seen corresponding path program 5 times [2024-06-14 13:24:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:06,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583298811] [2024-06-14 13:24:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:06,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:07,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:07,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583298811] [2024-06-14 13:24:07,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583298811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:07,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:07,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:07,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085479907] [2024-06-14 13:24:07,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:07,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:07,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:07,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:07,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:24:07,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 729 transitions, 17995 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:07,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:07,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:24:07,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:11,199 INFO L124 PetriNetUnfolderBase]: 7843/11921 cut-off events. [2024-06-14 13:24:11,199 INFO L125 PetriNetUnfolderBase]: For 1383492/1383514 co-relation queries the response was YES. [2024-06-14 13:24:11,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127866 conditions, 11921 events. 7843/11921 cut-off events. For 1383492/1383514 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 74405 event pairs, 2608 based on Foata normal form. 27/11947 useless extension candidates. Maximal degree in co-relation 127689. Up to 11257 conditions per place. [2024-06-14 13:24:11,572 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 562 selfloop transitions, 202 changer transitions 2/769 dead transitions. [2024-06-14 13:24:11,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 769 transitions, 20173 flow [2024-06-14 13:24:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:11,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:24:11,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-14 13:24:11,574 INFO L175 Difference]: Start difference. First operand has 375 places, 729 transitions, 17995 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:24:11,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 769 transitions, 20173 flow [2024-06-14 13:24:17,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 769 transitions, 19395 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-06-14 13:24:17,434 INFO L231 Difference]: Finished difference. Result has 379 places, 740 transitions, 17951 flow [2024-06-14 13:24:17,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17222, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17951, PETRI_PLACES=379, PETRI_TRANSITIONS=740} [2024-06-14 13:24:17,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-14 13:24:17,435 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 740 transitions, 17951 flow [2024-06-14 13:24:17,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:17,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:17,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:17,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:24:17,436 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)] === [2024-06-14 13:24:17,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1274758268, now seen corresponding path program 5 times [2024-06-14 13:24:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:17,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472794574] [2024-06-14 13:24:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:17,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:18,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:18,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472794574] [2024-06-14 13:24:18,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472794574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:18,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:18,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:18,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335851772] [2024-06-14 13:24:18,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:18,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:18,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:18,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:18,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-14 13:24:18,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 740 transitions, 17951 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:18,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:18,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-14 13:24:18,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:21,820 INFO L124 PetriNetUnfolderBase]: 7911/12013 cut-off events. [2024-06-14 13:24:21,820 INFO L125 PetriNetUnfolderBase]: For 1387870/1387874 co-relation queries the response was YES. [2024-06-14 13:24:21,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126281 conditions, 12013 events. 7911/12013 cut-off events. For 1387870/1387874 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 74903 event pairs, 2776 based on Foata normal form. 16/12028 useless extension candidates. Maximal degree in co-relation 126103. Up to 11191 conditions per place. [2024-06-14 13:24:22,006 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 647 selfloop transitions, 127 changer transitions 0/777 dead transitions. [2024-06-14 13:24:22,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 777 transitions, 20115 flow [2024-06-14 13:24:22,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:24:22,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:24:22,007 INFO L175 Difference]: Start difference. First operand has 379 places, 740 transitions, 17951 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:24:22,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 777 transitions, 20115 flow [2024-06-14 13:24:28,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 777 transitions, 19721 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-14 13:24:28,272 INFO L231 Difference]: Finished difference. Result has 382 places, 747 transitions, 17988 flow [2024-06-14 13:24:28,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17561, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17988, PETRI_PLACES=382, PETRI_TRANSITIONS=747} [2024-06-14 13:24:28,272 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-14 13:24:28,273 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 747 transitions, 17988 flow [2024-06-14 13:24:28,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:28,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:28,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:28,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:24:28,273 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)] === [2024-06-14 13:24:28,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1990639728, now seen corresponding path program 6 times [2024-06-14 13:24:28,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:28,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436501028] [2024-06-14 13:24:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:28,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat