./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix008.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix008.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix008.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix008.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-eb4cb34-m [2024-06-21 16:15:46,001 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:15:46,062 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:15:46,068 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:15:46,069 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:15:46,092 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:15:46,093 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:15:46,093 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:15:46,093 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:15:46,097 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:15:46,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:15:46,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:15:46,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:15:46,099 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:15:46,099 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:15:46,100 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:15:46,100 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:15:46,100 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:15:46,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:15:46,100 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:15:46,101 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:15:46,101 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:15:46,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:15:46,101 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:15:46,102 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:15:46,102 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:15:46,102 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:15:46,102 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:15:46,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:15:46,103 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:15:46,104 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:15:46,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:15:46,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:15:46,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:15:46,104 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:15:46,105 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:15:46,105 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:15:46,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:15:46,105 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:15:46,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:15:46,105 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:15:46,106 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:15:46,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:15:46,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:15:46,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:15:46,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:15:46,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:15:46,328 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:15:46,328 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:15:46,329 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix008.opt.i [2024-06-21 16:15:47,396 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:15:47,615 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:15:47,616 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix008.opt.i [2024-06-21 16:15:47,629 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f46173d3b/5fbae994e3b5426aa143657863c1fc94/FLAGc15a446d4 [2024-06-21 16:15:47,640 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f46173d3b/5fbae994e3b5426aa143657863c1fc94 [2024-06-21 16:15:47,642 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:15:47,643 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:15:47,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix008.opt.yml/witness.yml [2024-06-21 16:15:47,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:15:47,818 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:15:47,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:15:47,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:15:47,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:15:47,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:15:47" (1/2) ... [2024-06-21 16:15:47,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3caa1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:15:47, skipping insertion in model container [2024-06-21 16:15:47,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:15:47" (1/2) ... [2024-06-21 16:15:47,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d0c91ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:15:47, skipping insertion in model container [2024-06-21 16:15:47,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:15:47" (2/2) ... [2024-06-21 16:15:47,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3caa1e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:47, skipping insertion in model container [2024-06-21 16:15:47,826 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:15:47" (2/2) ... [2024-06-21 16:15:47,827 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:15:47,922 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:15:47,923 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) [2024-06-21 16:15:47,923 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) [2024-06-21 16:15:47,923 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) [2024-06-21 16:15:47,924 INFO L97 edCorrectnessWitness]: Location invariant before [L875-L875] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) [2024-06-21 16:15:47,924 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:15:47,924 INFO L106 edCorrectnessWitness]: ghost_update [L868-L868] multithreaded = 1; [2024-06-21 16:15:47,963 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:15:48,359 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:15:48,366 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:15:48,479 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:15:48,516 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:15:48,517 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48 WrapperNode [2024-06-21 16:15:48,517 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:15:48,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:15:48,518 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:15:48,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:15:48,523 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 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,549 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 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,606 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 161 [2024-06-21 16:15:48,610 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:15:48,611 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:15:48,611 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:15:48,611 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:15:48,620 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,624 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,640 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]. [2024-06-21 16:15:48,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,682 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,687 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:15:48,687 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:15:48,688 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:15:48,688 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:15:48,688 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (1/1) ... [2024-06-21 16:15:48,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:15:48,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:15:48,734 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) [2024-06-21 16:15:48,744 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 [2024-06-21 16:15:48,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:15:48,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:15:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:15:48,770 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:15:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:15:48,770 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:15:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:15:48,771 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:15:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:15:48,771 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:15:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:15:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:15:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:15:48,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:15:48,773 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:15:48,901 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:15:48,903 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:15:49,211 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:15:49,211 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:15:49,409 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:15:49,409 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:15:49,409 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:15:49 BoogieIcfgContainer [2024-06-21 16:15:49,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:15:49,412 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:15:49,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:15:49,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:15:49,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:15:47" (1/4) ... [2024-06-21 16:15:49,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bedbd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:15:49, skipping insertion in model container [2024-06-21 16:15:49,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:15:47" (2/4) ... [2024-06-21 16:15:49,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bedbd7e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:15:49, skipping insertion in model container [2024-06-21 16:15:49,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:15:48" (3/4) ... [2024-06-21 16:15:49,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bedbd7e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:15:49, skipping insertion in model container [2024-06-21 16:15:49,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:15:49" (4/4) ... [2024-06-21 16:15:49,417 INFO L112 eAbstractionObserver]: Analyzing ICFG mix008.opt.i [2024-06-21 16:15:49,431 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:15:49,432 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:15:49,432 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:15:49,475 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:15:49,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 16:15:49,544 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 16:15:49,544 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:15:49,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:15:49,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 16:15:49,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 16:15:49,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:15:49,571 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;@3d042cdc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:15:49,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:15:49,576 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:15:49,576 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:15:49,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:15:49,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:49,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:15:49,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:15:49,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash 426110179, now seen corresponding path program 1 times [2024-06-21 16:15:49,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:49,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762187874] [2024-06-21 16:15:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:49,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:50,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:50,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762187874] [2024-06-21 16:15:50,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762187874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:50,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:50,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:15:50,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930595616] [2024-06-21 16:15:50,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:50,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:15:50,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:50,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:15:50,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:15:50,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 16:15:50,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:50,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:50,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 16:15:50,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:51,641 INFO L124 PetriNetUnfolderBase]: 7892/11215 cut-off events. [2024-06-21 16:15:51,642 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-21 16:15:51,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22292 conditions, 11215 events. 7892/11215 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 63399 event pairs, 6010 based on Foata normal form. 1/10886 useless extension candidates. Maximal degree in co-relation 22279. Up to 10748 conditions per place. [2024-06-21 16:15:51,702 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 16:15:51,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 229 flow [2024-06-21 16:15:51,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:15:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:15:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-21 16:15:51,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-21 16:15:51,714 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 102 transitions. [2024-06-21 16:15:51,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 229 flow [2024-06-21 16:15:51,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:51,721 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 16:15:51,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 16:15:51,724 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 16:15:51,725 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 16:15:51,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:51,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:51,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:51,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:15:51,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:15:51,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:51,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1470444774, now seen corresponding path program 1 times [2024-06-21 16:15:51,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:51,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532992487] [2024-06-21 16:15:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:51,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:52,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:52,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532992487] [2024-06-21 16:15:52,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532992487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:52,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:52,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:15:52,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786740541] [2024-06-21 16:15:52,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:52,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:15:52,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:52,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:15:52,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:15:52,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 16:15:52,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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) [2024-06-21 16:15:52,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:52,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 16:15:52,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:53,598 INFO L124 PetriNetUnfolderBase]: 9032/12526 cut-off events. [2024-06-21 16:15:53,598 INFO L125 PetriNetUnfolderBase]: For 2518/2518 co-relation queries the response was YES. [2024-06-21 16:15:53,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28439 conditions, 12526 events. 9032/12526 cut-off events. For 2518/2518 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 68589 event pairs, 6162 based on Foata normal form. 4/12453 useless extension candidates. Maximal degree in co-relation 28427. Up to 12238 conditions per place. [2024-06-21 16:15:53,652 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 16:15:53,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 323 flow [2024-06-21 16:15:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:15:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:15:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-21 16:15:53,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132075471698113 [2024-06-21 16:15:53,654 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 130 transitions. [2024-06-21 16:15:53,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 323 flow [2024-06-21 16:15:53,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:15:53,656 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 16:15:53,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 16:15:53,657 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 16:15:53,657 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 16:15:53,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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) [2024-06-21 16:15:53,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:53,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:53,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:15:53,658 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:15:53,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:53,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1660850568, now seen corresponding path program 1 times [2024-06-21 16:15:53,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:53,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795853166] [2024-06-21 16:15:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:53,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:54,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:54,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795853166] [2024-06-21 16:15:54,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795853166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:54,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:54,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:15:54,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719324395] [2024-06-21 16:15:54,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:54,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:15:54,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:15:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:15:54,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 16:15:54,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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) [2024-06-21 16:15:54,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:54,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 16:15:54,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:55,317 INFO L124 PetriNetUnfolderBase]: 9050/12627 cut-off events. [2024-06-21 16:15:55,318 INFO L125 PetriNetUnfolderBase]: For 7273/7273 co-relation queries the response was YES. [2024-06-21 16:15:55,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31882 conditions, 12627 events. 9050/12627 cut-off events. For 7273/7273 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 70201 event pairs, 4826 based on Foata normal form. 7/12605 useless extension candidates. Maximal degree in co-relation 31868. Up to 12159 conditions per place. [2024-06-21 16:15:55,397 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 71 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-21 16:15:55,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 539 flow [2024-06-21 16:15:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:15:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:15:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-06-21 16:15:55,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-21 16:15:55,400 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 170 transitions. [2024-06-21 16:15:55,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 539 flow [2024-06-21 16:15:55,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 520 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 16:15:55,403 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-21 16:15:55,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-21 16:15:55,404 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-21 16:15:55,404 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-21 16:15:55,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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) [2024-06-21 16:15:55,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:55,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:55,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:15:55,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:15:55,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:55,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1783815333, now seen corresponding path program 1 times [2024-06-21 16:15:55,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:55,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616484589] [2024-06-21 16:15:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:55,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:56,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:56,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616484589] [2024-06-21 16:15:56,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616484589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:56,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:56,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:15:56,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715046774] [2024-06-21 16:15:56,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:56,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:15:56,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:56,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:15:56,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:15:56,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 16:15:56,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:56,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:56,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 16:15:56,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:57,588 INFO L124 PetriNetUnfolderBase]: 9079/12672 cut-off events. [2024-06-21 16:15:57,589 INFO L125 PetriNetUnfolderBase]: For 17177/17183 co-relation queries the response was YES. [2024-06-21 16:15:57,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37378 conditions, 12672 events. 9079/12672 cut-off events. For 17177/17183 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70392 event pairs, 3910 based on Foata normal form. 18/12661 useless extension candidates. Maximal degree in co-relation 37361. Up to 12124 conditions per place. [2024-06-21 16:15:57,651 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 78 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-06-21 16:15:57,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 112 transitions, 684 flow [2024-06-21 16:15:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:15:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:15:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-21 16:15:57,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194968553459119 [2024-06-21 16:15:57,654 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 197 transitions. [2024-06-21 16:15:57,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 112 transitions, 684 flow [2024-06-21 16:15:57,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 112 transitions, 672 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 16:15:57,664 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 389 flow [2024-06-21 16:15:57,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-21 16:15:57,665 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-21 16:15:57,665 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 389 flow [2024-06-21 16:15:57,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:57,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:57,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:57,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:15:57,666 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:15:57,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:57,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1424289702, now seen corresponding path program 1 times [2024-06-21 16:15:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:57,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745386532] [2024-06-21 16:15:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:57,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:58,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:58,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745386532] [2024-06-21 16:15:58,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745386532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:58,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:58,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:15:58,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029556089] [2024-06-21 16:15:58,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:58,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:15:58,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:58,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:15:58,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:15:58,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:15:58,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:58,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:58,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:15:58,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:59,432 INFO L124 PetriNetUnfolderBase]: 7920/11330 cut-off events. [2024-06-21 16:15:59,432 INFO L125 PetriNetUnfolderBase]: For 22247/22247 co-relation queries the response was YES. [2024-06-21 16:15:59,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36246 conditions, 11330 events. 7920/11330 cut-off events. For 22247/22247 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 64823 event pairs, 4036 based on Foata normal form. 3/11212 useless extension candidates. Maximal degree in co-relation 36225. Up to 10775 conditions per place. [2024-06-21 16:15:59,499 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 66 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-21 16:15:59,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 585 flow [2024-06-21 16:15:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:15:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:15:59,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-21 16:15:59,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-21 16:15:59,501 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 389 flow. Second operand 5 states and 136 transitions. [2024-06-21 16:15:59,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 585 flow [2024-06-21 16:15:59,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 516 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:59,509 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 351 flow [2024-06-21 16:15:59,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-21 16:15:59,515 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-21 16:15:59,515 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 351 flow [2024-06-21 16:15:59,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:59,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:59,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:59,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:15:59,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:15:59,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:59,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1202242912, now seen corresponding path program 1 times [2024-06-21 16:15:59,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:59,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141164050] [2024-06-21 16:15:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:59,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:00,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:00,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141164050] [2024-06-21 16:16:00,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141164050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:00,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:00,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:16:00,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621896816] [2024-06-21 16:16:00,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:00,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:16:00,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:16:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:16:00,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:16:00,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:00,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:00,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:16:00,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:01,585 INFO L124 PetriNetUnfolderBase]: 9587/13502 cut-off events. [2024-06-21 16:16:01,586 INFO L125 PetriNetUnfolderBase]: For 30498/30498 co-relation queries the response was YES. [2024-06-21 16:16:01,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43615 conditions, 13502 events. 9587/13502 cut-off events. For 30498/30498 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 75663 event pairs, 4728 based on Foata normal form. 5/13377 useless extension candidates. Maximal degree in co-relation 43592. Up to 12930 conditions per place. [2024-06-21 16:16:01,672 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 22 changer transitions 0/110 dead transitions. [2024-06-21 16:16:01,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 110 transitions, 749 flow [2024-06-21 16:16:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:16:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:16:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 16:16:01,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 16:16:01,674 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 351 flow. Second operand 6 states and 165 transitions. [2024-06-21 16:16:01,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 110 transitions, 749 flow [2024-06-21 16:16:01,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 720 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:01,683 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 496 flow [2024-06-21 16:16:01,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=496, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2024-06-21 16:16:01,684 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-06-21 16:16:01,684 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 496 flow [2024-06-21 16:16:01,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:01,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:01,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:01,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:16:01,685 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:01,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:01,685 INFO L85 PathProgramCache]: Analyzing trace with hash 997903923, now seen corresponding path program 1 times [2024-06-21 16:16:01,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:01,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813412235] [2024-06-21 16:16:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:01,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:02,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:02,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813412235] [2024-06-21 16:16:02,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813412235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:02,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:02,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:16:02,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811206344] [2024-06-21 16:16:02,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:02,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:16:02,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:16:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:16:02,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:16:02,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 496 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:02,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:02,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:16:02,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:04,152 INFO L124 PetriNetUnfolderBase]: 10390/14514 cut-off events. [2024-06-21 16:16:04,153 INFO L125 PetriNetUnfolderBase]: For 52799/52817 co-relation queries the response was YES. [2024-06-21 16:16:04,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52901 conditions, 14514 events. 10390/14514 cut-off events. For 52799/52817 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 81366 event pairs, 5061 based on Foata normal form. 14/14430 useless extension candidates. Maximal degree in co-relation 52876. Up to 13936 conditions per place. [2024-06-21 16:16:04,304 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 25 changer transitions 0/116 dead transitions. [2024-06-21 16:16:04,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 116 transitions, 849 flow [2024-06-21 16:16:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:16:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:16:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 16:16:04,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-21 16:16:04,305 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 496 flow. Second operand 6 states and 167 transitions. [2024-06-21 16:16:04,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 116 transitions, 849 flow [2024-06-21 16:16:04,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 825 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-21 16:16:04,332 INFO L231 Difference]: Finished difference. Result has 78 places, 86 transitions, 568 flow [2024-06-21 16:16:04,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=568, PETRI_PLACES=78, PETRI_TRANSITIONS=86} [2024-06-21 16:16:04,333 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-21 16:16:04,334 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 86 transitions, 568 flow [2024-06-21 16:16:04,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:04,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:04,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:04,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:16:04,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:04,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:04,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1351248567, now seen corresponding path program 2 times [2024-06-21 16:16:04,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:04,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691461535] [2024-06-21 16:16:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:04,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:05,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:05,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691461535] [2024-06-21 16:16:05,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691461535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:05,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:05,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:16:05,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059138498] [2024-06-21 16:16:05,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:05,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:16:05,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:05,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:16:05,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:16:05,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:16:05,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 86 transitions, 568 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:05,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:05,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:16:05,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:06,521 INFO L124 PetriNetUnfolderBase]: 10366/14466 cut-off events. [2024-06-21 16:16:06,522 INFO L125 PetriNetUnfolderBase]: For 58357/58363 co-relation queries the response was YES. [2024-06-21 16:16:06,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53286 conditions, 14466 events. 10366/14466 cut-off events. For 58357/58363 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 80991 event pairs, 5081 based on Foata normal form. 3/14366 useless extension candidates. Maximal degree in co-relation 53258. Up to 13906 conditions per place. [2024-06-21 16:16:06,645 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-21 16:16:06,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 110 transitions, 828 flow [2024-06-21 16:16:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:16:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:16:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 16:16:06,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 16:16:06,647 INFO L175 Difference]: Start difference. First operand has 78 places, 86 transitions, 568 flow. Second operand 6 states and 162 transitions. [2024-06-21 16:16:06,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 110 transitions, 828 flow [2024-06-21 16:16:06,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 785 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:16:06,671 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 588 flow [2024-06-21 16:16:06,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=588, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-21 16:16:06,672 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-21 16:16:06,672 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 588 flow [2024-06-21 16:16:06,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:06,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:06,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:06,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:16:06,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:06,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1846890919, now seen corresponding path program 1 times [2024-06-21 16:16:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:06,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257336321] [2024-06-21 16:16:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:06,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:07,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:07,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257336321] [2024-06-21 16:16:07,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257336321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:07,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:07,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:07,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676285135] [2024-06-21 16:16:07,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:07,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:07,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:07,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:07,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:07,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:07,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:07,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:07,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:09,065 INFO L124 PetriNetUnfolderBase]: 11509/16004 cut-off events. [2024-06-21 16:16:09,065 INFO L125 PetriNetUnfolderBase]: For 75054/75057 co-relation queries the response was YES. [2024-06-21 16:16:09,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60275 conditions, 16004 events. 11509/16004 cut-off events. For 75054/75057 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 89224 event pairs, 4900 based on Foata normal form. 12/16000 useless extension candidates. Maximal degree in co-relation 60246. Up to 14734 conditions per place. [2024-06-21 16:16:09,174 INFO L140 encePairwiseOnDemand]: 36/53 looper letters, 123 selfloop transitions, 59 changer transitions 0/189 dead transitions. [2024-06-21 16:16:09,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 189 transitions, 1666 flow [2024-06-21 16:16:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-21 16:16:09,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2024-06-21 16:16:09,176 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 588 flow. Second operand 8 states and 230 transitions. [2024-06-21 16:16:09,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 189 transitions, 1666 flow [2024-06-21 16:16:09,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 189 transitions, 1503 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:16:09,214 INFO L231 Difference]: Finished difference. Result has 86 places, 122 transitions, 939 flow [2024-06-21 16:16:09,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=939, PETRI_PLACES=86, PETRI_TRANSITIONS=122} [2024-06-21 16:16:09,215 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-21 16:16:09,215 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 122 transitions, 939 flow [2024-06-21 16:16:09,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:09,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:09,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:09,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:16:09,215 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:09,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1022794535, now seen corresponding path program 2 times [2024-06-21 16:16:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:09,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219493999] [2024-06-21 16:16:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:09,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:09,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:09,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219493999] [2024-06-21 16:16:09,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219493999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:09,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:09,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:09,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999069146] [2024-06-21 16:16:09,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:09,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:09,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:09,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:09,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:10,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:10,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 122 transitions, 939 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:10,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:10,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:10,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:11,812 INFO L124 PetriNetUnfolderBase]: 11857/16522 cut-off events. [2024-06-21 16:16:11,812 INFO L125 PetriNetUnfolderBase]: For 107657/107666 co-relation queries the response was YES. [2024-06-21 16:16:11,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71264 conditions, 16522 events. 11857/16522 cut-off events. For 107657/107666 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 92474 event pairs, 5043 based on Foata normal form. 24/16530 useless extension candidates. Maximal degree in co-relation 71231. Up to 15002 conditions per place. [2024-06-21 16:16:11,936 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 102 selfloop transitions, 81 changer transitions 0/190 dead transitions. [2024-06-21 16:16:11,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 190 transitions, 1809 flow [2024-06-21 16:16:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-21 16:16:11,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-21 16:16:11,938 INFO L175 Difference]: Start difference. First operand has 86 places, 122 transitions, 939 flow. Second operand 7 states and 198 transitions. [2024-06-21 16:16:11,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 190 transitions, 1809 flow [2024-06-21 16:16:12,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 190 transitions, 1715 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-21 16:16:12,019 INFO L231 Difference]: Finished difference. Result has 93 places, 143 transitions, 1312 flow [2024-06-21 16:16:12,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1312, PETRI_PLACES=93, PETRI_TRANSITIONS=143} [2024-06-21 16:16:12,020 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-21 16:16:12,020 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 143 transitions, 1312 flow [2024-06-21 16:16:12,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:12,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:12,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:12,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:16:12,021 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:12,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1060969203, now seen corresponding path program 3 times [2024-06-21 16:16:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:12,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286573027] [2024-06-21 16:16:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:12,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:12,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:12,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286573027] [2024-06-21 16:16:12,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286573027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:12,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:12,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:12,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354752938] [2024-06-21 16:16:12,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:12,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:12,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:12,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:12,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:12,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:12,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 143 transitions, 1312 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:12,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:12,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:12,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:14,747 INFO L124 PetriNetUnfolderBase]: 11939/16635 cut-off events. [2024-06-21 16:16:14,747 INFO L125 PetriNetUnfolderBase]: For 141260/141267 co-relation queries the response was YES. [2024-06-21 16:16:14,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78321 conditions, 16635 events. 11939/16635 cut-off events. For 141260/141267 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 92950 event pairs, 5063 based on Foata normal form. 13/16622 useless extension candidates. Maximal degree in co-relation 78284. Up to 15054 conditions per place. [2024-06-21 16:16:14,921 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 106 selfloop transitions, 93 changer transitions 0/206 dead transitions. [2024-06-21 16:16:14,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 206 transitions, 2254 flow [2024-06-21 16:16:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 16:16:14,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 16:16:14,924 INFO L175 Difference]: Start difference. First operand has 93 places, 143 transitions, 1312 flow. Second operand 7 states and 196 transitions. [2024-06-21 16:16:14,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 206 transitions, 2254 flow [2024-06-21 16:16:15,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 206 transitions, 2127 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 16:16:15,049 INFO L231 Difference]: Finished difference. Result has 98 places, 159 transitions, 1595 flow [2024-06-21 16:16:15,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1595, PETRI_PLACES=98, PETRI_TRANSITIONS=159} [2024-06-21 16:16:15,050 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-21 16:16:15,050 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 159 transitions, 1595 flow [2024-06-21 16:16:15,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:15,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:15,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:15,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:16:15,051 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:15,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:15,051 INFO L85 PathProgramCache]: Analyzing trace with hash -845425865, now seen corresponding path program 4 times [2024-06-21 16:16:15,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:15,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790842454] [2024-06-21 16:16:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:15,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:15,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:15,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790842454] [2024-06-21 16:16:15,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790842454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:15,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:15,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:15,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694941475] [2024-06-21 16:16:15,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:15,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:15,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:15,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:15,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 159 transitions, 1595 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:15,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:15,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:15,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:17,917 INFO L124 PetriNetUnfolderBase]: 11954/16666 cut-off events. [2024-06-21 16:16:17,917 INFO L125 PetriNetUnfolderBase]: For 175110/175127 co-relation queries the response was YES. [2024-06-21 16:16:17,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82714 conditions, 16666 events. 11954/16666 cut-off events. For 175110/175127 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 93287 event pairs, 5039 based on Foata normal form. 22/16662 useless extension candidates. Maximal degree in co-relation 82675. Up to 15072 conditions per place. [2024-06-21 16:16:18,019 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 96 selfloop transitions, 108 changer transitions 0/211 dead transitions. [2024-06-21 16:16:18,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 211 transitions, 2414 flow [2024-06-21 16:16:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 16:16:18,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-21 16:16:18,033 INFO L175 Difference]: Start difference. First operand has 98 places, 159 transitions, 1595 flow. Second operand 7 states and 194 transitions. [2024-06-21 16:16:18,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 211 transitions, 2414 flow [2024-06-21 16:16:18,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 211 transitions, 2219 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 16:16:18,134 INFO L231 Difference]: Finished difference. Result has 102 places, 167 transitions, 1748 flow [2024-06-21 16:16:18,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1748, PETRI_PLACES=102, PETRI_TRANSITIONS=167} [2024-06-21 16:16:18,135 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-21 16:16:18,135 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 167 transitions, 1748 flow [2024-06-21 16:16:18,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:18,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:18,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:18,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:16:18,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:18,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash -845416937, now seen corresponding path program 1 times [2024-06-21 16:16:18,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:18,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260980923] [2024-06-21 16:16:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:18,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:18,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:18,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260980923] [2024-06-21 16:16:18,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260980923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:18,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:18,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:18,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815560277] [2024-06-21 16:16:18,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:18,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:18,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:19,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:16:19,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 167 transitions, 1748 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:19,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:19,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:16:19,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:20,958 INFO L124 PetriNetUnfolderBase]: 10579/15010 cut-off events. [2024-06-21 16:16:20,959 INFO L125 PetriNetUnfolderBase]: For 159454/159459 co-relation queries the response was YES. [2024-06-21 16:16:21,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74723 conditions, 15010 events. 10579/15010 cut-off events. For 159454/159459 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 85909 event pairs, 4299 based on Foata normal form. 12/14948 useless extension candidates. Maximal degree in co-relation 74682. Up to 14195 conditions per place. [2024-06-21 16:16:21,065 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 173 selfloop transitions, 26 changer transitions 0/207 dead transitions. [2024-06-21 16:16:21,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 207 transitions, 2396 flow [2024-06-21 16:16:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-21 16:16:21,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148247978436657 [2024-06-21 16:16:21,071 INFO L175 Difference]: Start difference. First operand has 102 places, 167 transitions, 1748 flow. Second operand 7 states and 191 transitions. [2024-06-21 16:16:21,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 207 transitions, 2396 flow [2024-06-21 16:16:21,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 207 transitions, 2206 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:21,177 INFO L231 Difference]: Finished difference. Result has 105 places, 171 transitions, 1675 flow [2024-06-21 16:16:21,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1675, PETRI_PLACES=105, PETRI_TRANSITIONS=171} [2024-06-21 16:16:21,178 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-21 16:16:21,178 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 171 transitions, 1675 flow [2024-06-21 16:16:21,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:21,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:21,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:21,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:16:21,178 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:21,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash -2054183823, now seen corresponding path program 1 times [2024-06-21 16:16:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:21,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206073012] [2024-06-21 16:16:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:21,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:21,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206073012] [2024-06-21 16:16:21,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206073012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:21,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:21,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:16:21,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526342328] [2024-06-21 16:16:21,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:21,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:16:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:21,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:16:21,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:16:21,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:16:21,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 171 transitions, 1675 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:21,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:21,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:16:21,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:23,533 INFO L124 PetriNetUnfolderBase]: 10572/14996 cut-off events. [2024-06-21 16:16:23,533 INFO L125 PetriNetUnfolderBase]: For 175172/175174 co-relation queries the response was YES. [2024-06-21 16:16:23,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76505 conditions, 14996 events. 10572/14996 cut-off events. For 175172/175174 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 85581 event pairs, 4456 based on Foata normal form. 2/14922 useless extension candidates. Maximal degree in co-relation 76463. Up to 14310 conditions per place. [2024-06-21 16:16:23,642 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 167 selfloop transitions, 10 changer transitions 0/185 dead transitions. [2024-06-21 16:16:23,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 185 transitions, 2073 flow [2024-06-21 16:16:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:16:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:16:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 16:16:23,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830188679245283 [2024-06-21 16:16:23,644 INFO L175 Difference]: Start difference. First operand has 105 places, 171 transitions, 1675 flow. Second operand 5 states and 128 transitions. [2024-06-21 16:16:23,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 185 transitions, 2073 flow [2024-06-21 16:16:23,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 185 transitions, 1978 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 16:16:23,749 INFO L231 Difference]: Finished difference. Result has 105 places, 171 transitions, 1609 flow [2024-06-21 16:16:23,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1609, PETRI_PLACES=105, PETRI_TRANSITIONS=171} [2024-06-21 16:16:23,750 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-21 16:16:23,750 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 171 transitions, 1609 flow [2024-06-21 16:16:23,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:23,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:23,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:23,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:16:23,751 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:23,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:23,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1641857879, now seen corresponding path program 1 times [2024-06-21 16:16:23,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:23,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195427960] [2024-06-21 16:16:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:23,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:24,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:24,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195427960] [2024-06-21 16:16:24,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195427960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:24,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:24,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:24,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019766295] [2024-06-21 16:16:24,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:24,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:24,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:24,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:24,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:24,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:24,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 171 transitions, 1609 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:24,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:24,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:24,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:26,510 INFO L124 PetriNetUnfolderBase]: 12155/17006 cut-off events. [2024-06-21 16:16:26,510 INFO L125 PetriNetUnfolderBase]: For 223112/223139 co-relation queries the response was YES. [2024-06-21 16:16:26,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87777 conditions, 17006 events. 12155/17006 cut-off events. For 223112/223139 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 96019 event pairs, 5122 based on Foata normal form. 34/17021 useless extension candidates. Maximal degree in co-relation 87734. Up to 15273 conditions per place. [2024-06-21 16:16:26,644 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 117 selfloop transitions, 113 changer transitions 0/237 dead transitions. [2024-06-21 16:16:26,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 237 transitions, 2695 flow [2024-06-21 16:16:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-21 16:16:26,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5309973045822103 [2024-06-21 16:16:26,646 INFO L175 Difference]: Start difference. First operand has 105 places, 171 transitions, 1609 flow. Second operand 7 states and 197 transitions. [2024-06-21 16:16:26,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 237 transitions, 2695 flow [2024-06-21 16:16:26,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 237 transitions, 2662 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:26,770 INFO L231 Difference]: Finished difference. Result has 110 places, 190 transitions, 2155 flow [2024-06-21 16:16:26,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2155, PETRI_PLACES=110, PETRI_TRANSITIONS=190} [2024-06-21 16:16:26,771 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-21 16:16:26,771 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 190 transitions, 2155 flow [2024-06-21 16:16:26,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:26,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:26,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:26,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:16:26,771 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:26,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1641863459, now seen corresponding path program 2 times [2024-06-21 16:16:26,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:26,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250788682] [2024-06-21 16:16:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:26,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:27,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250788682] [2024-06-21 16:16:27,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250788682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:27,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:27,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:27,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638483780] [2024-06-21 16:16:27,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:27,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:27,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:27,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:27,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:27,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 190 transitions, 2155 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:27,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:27,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:27,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:29,971 INFO L124 PetriNetUnfolderBase]: 12133/16969 cut-off events. [2024-06-21 16:16:29,971 INFO L125 PetriNetUnfolderBase]: For 258584/258603 co-relation queries the response was YES. [2024-06-21 16:16:30,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93104 conditions, 16969 events. 12133/16969 cut-off events. For 258584/258603 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 95618 event pairs, 5134 based on Foata normal form. 28/16978 useless extension candidates. Maximal degree in co-relation 93059. Up to 15259 conditions per place. [2024-06-21 16:16:30,171 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 118 selfloop transitions, 120 changer transitions 0/245 dead transitions. [2024-06-21 16:16:30,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 245 transitions, 3133 flow [2024-06-21 16:16:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-21 16:16:30,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390835579514824 [2024-06-21 16:16:30,173 INFO L175 Difference]: Start difference. First operand has 110 places, 190 transitions, 2155 flow. Second operand 7 states and 200 transitions. [2024-06-21 16:16:30,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 245 transitions, 3133 flow [2024-06-21 16:16:30,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 245 transitions, 2944 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 16:16:30,489 INFO L231 Difference]: Finished difference. Result has 116 places, 197 transitions, 2459 flow [2024-06-21 16:16:30,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2459, PETRI_PLACES=116, PETRI_TRANSITIONS=197} [2024-06-21 16:16:30,490 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-21 16:16:30,490 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 197 transitions, 2459 flow [2024-06-21 16:16:30,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:30,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:30,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:30,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:16:30,491 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:30,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2001458605, now seen corresponding path program 3 times [2024-06-21 16:16:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:30,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872367437] [2024-06-21 16:16:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:30,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:31,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872367437] [2024-06-21 16:16:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872367437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:31,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:31,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:31,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244312956] [2024-06-21 16:16:31,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:31,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:31,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:31,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:31,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 197 transitions, 2459 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:31,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:31,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:31,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:33,355 INFO L124 PetriNetUnfolderBase]: 12148/17016 cut-off events. [2024-06-21 16:16:33,356 INFO L125 PetriNetUnfolderBase]: For 289992/290077 co-relation queries the response was YES. [2024-06-21 16:16:33,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96490 conditions, 17016 events. 12148/17016 cut-off events. For 289992/290077 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 96311 event pairs, 5169 based on Foata normal form. 66/17030 useless extension candidates. Maximal degree in co-relation 96442. Up to 15282 conditions per place. [2024-06-21 16:16:33,520 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 112 selfloop transitions, 124 changer transitions 0/243 dead transitions. [2024-06-21 16:16:33,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 243 transitions, 3275 flow [2024-06-21 16:16:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 16:16:33,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-21 16:16:33,522 INFO L175 Difference]: Start difference. First operand has 116 places, 197 transitions, 2459 flow. Second operand 7 states and 188 transitions. [2024-06-21 16:16:33,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 243 transitions, 3275 flow [2024-06-21 16:16:33,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 243 transitions, 3101 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:33,741 INFO L231 Difference]: Finished difference. Result has 119 places, 206 transitions, 2701 flow [2024-06-21 16:16:33,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2701, PETRI_PLACES=119, PETRI_TRANSITIONS=206} [2024-06-21 16:16:33,741 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-21 16:16:33,742 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 206 transitions, 2701 flow [2024-06-21 16:16:33,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:33,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:33,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:33,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:16:33,742 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:33,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:33,742 INFO L85 PathProgramCache]: Analyzing trace with hash 744813113, now seen corresponding path program 1 times [2024-06-21 16:16:33,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:33,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299594742] [2024-06-21 16:16:33,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:33,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:34,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:34,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299594742] [2024-06-21 16:16:34,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299594742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:34,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:34,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:16:34,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986359340] [2024-06-21 16:16:34,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:34,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:16:34,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:34,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:16:34,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:16:34,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:16:34,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 206 transitions, 2701 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:34,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:34,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:16:34,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:36,266 INFO L124 PetriNetUnfolderBase]: 10739/15414 cut-off events. [2024-06-21 16:16:36,266 INFO L125 PetriNetUnfolderBase]: For 268732/268734 co-relation queries the response was YES. [2024-06-21 16:16:36,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87920 conditions, 15414 events. 10739/15414 cut-off events. For 268732/268734 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 89148 event pairs, 4440 based on Foata normal form. 4/15400 useless extension candidates. Maximal degree in co-relation 87871. Up to 14517 conditions per place. [2024-06-21 16:16:36,405 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 207 selfloop transitions, 14 changer transitions 0/229 dead transitions. [2024-06-21 16:16:36,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 229 transitions, 3243 flow [2024-06-21 16:16:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:16:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:16:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 16:16:36,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-21 16:16:36,415 INFO L175 Difference]: Start difference. First operand has 119 places, 206 transitions, 2701 flow. Second operand 6 states and 151 transitions. [2024-06-21 16:16:36,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 229 transitions, 3243 flow [2024-06-21 16:16:36,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 229 transitions, 3031 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:36,629 INFO L231 Difference]: Finished difference. Result has 121 places, 210 transitions, 2576 flow [2024-06-21 16:16:36,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2576, PETRI_PLACES=121, PETRI_TRANSITIONS=210} [2024-06-21 16:16:36,629 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-21 16:16:36,630 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 210 transitions, 2576 flow [2024-06-21 16:16:36,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:36,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:36,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:36,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:16:36,630 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:36,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:36,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1892556864, now seen corresponding path program 1 times [2024-06-21 16:16:36,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:36,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653113369] [2024-06-21 16:16:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:36,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:37,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:37,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653113369] [2024-06-21 16:16:37,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653113369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:37,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:37,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:37,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524532931] [2024-06-21 16:16:37,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:37,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:37,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:37,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:37,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:37,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:16:37,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 210 transitions, 2576 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:37,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:37,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:16:37,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:39,642 INFO L124 PetriNetUnfolderBase]: 11575/16298 cut-off events. [2024-06-21 16:16:39,642 INFO L125 PetriNetUnfolderBase]: For 328598/328676 co-relation queries the response was YES. [2024-06-21 16:16:39,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96566 conditions, 16298 events. 11575/16298 cut-off events. For 328598/328676 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 92693 event pairs, 3697 based on Foata normal form. 54/16320 useless extension candidates. Maximal degree in co-relation 96515. Up to 15001 conditions per place. [2024-06-21 16:16:39,782 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 181 selfloop transitions, 41 changer transitions 0/256 dead transitions. [2024-06-21 16:16:39,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 256 transitions, 3370 flow [2024-06-21 16:16:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 16:16:39,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-21 16:16:39,785 INFO L175 Difference]: Start difference. First operand has 121 places, 210 transitions, 2576 flow. Second operand 7 states and 192 transitions. [2024-06-21 16:16:39,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 256 transitions, 3370 flow [2024-06-21 16:16:40,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 256 transitions, 3313 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:40,022 INFO L231 Difference]: Finished difference. Result has 124 places, 216 transitions, 2737 flow [2024-06-21 16:16:40,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2519, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2737, PETRI_PLACES=124, PETRI_TRANSITIONS=216} [2024-06-21 16:16:40,023 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-21 16:16:40,023 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 216 transitions, 2737 flow [2024-06-21 16:16:40,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:40,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:40,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:40,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:16:40,024 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:40,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:40,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1321520404, now seen corresponding path program 2 times [2024-06-21 16:16:40,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:40,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823533892] [2024-06-21 16:16:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:40,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:40,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823533892] [2024-06-21 16:16:40,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823533892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:40,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:40,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:16:40,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891700342] [2024-06-21 16:16:40,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:40,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:16:40,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:40,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:16:40,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:16:40,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:16:40,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 216 transitions, 2737 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:40,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:40,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:16:40,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:42,778 INFO L124 PetriNetUnfolderBase]: 11550/16258 cut-off events. [2024-06-21 16:16:42,779 INFO L125 PetriNetUnfolderBase]: For 362952/363014 co-relation queries the response was YES. [2024-06-21 16:16:42,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99252 conditions, 16258 events. 11550/16258 cut-off events. For 362952/363014 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 92157 event pairs, 4416 based on Foata normal form. 38/16264 useless extension candidates. Maximal degree in co-relation 99200. Up to 15116 conditions per place. [2024-06-21 16:16:43,134 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 180 selfloop transitions, 40 changer transitions 0/254 dead transitions. [2024-06-21 16:16:43,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 254 transitions, 3307 flow [2024-06-21 16:16:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:16:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:16:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 16:16:43,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 16:16:43,136 INFO L175 Difference]: Start difference. First operand has 124 places, 216 transitions, 2737 flow. Second operand 7 states and 189 transitions. [2024-06-21 16:16:43,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 254 transitions, 3307 flow [2024-06-21 16:16:43,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 254 transitions, 3171 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-21 16:16:43,442 INFO L231 Difference]: Finished difference. Result has 128 places, 216 transitions, 2693 flow [2024-06-21 16:16:43,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2601, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2693, PETRI_PLACES=128, PETRI_TRANSITIONS=216} [2024-06-21 16:16:43,443 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-21 16:16:43,443 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 216 transitions, 2693 flow [2024-06-21 16:16:43,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:43,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:43,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:43,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:16:43,444 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:43,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:43,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1206044536, now seen corresponding path program 1 times [2024-06-21 16:16:43,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:43,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307604789] [2024-06-21 16:16:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:43,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:44,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:44,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307604789] [2024-06-21 16:16:44,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307604789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:44,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:44,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:44,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255103976] [2024-06-21 16:16:44,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:44,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:44,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:44,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 216 transitions, 2693 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:44,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:44,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:44,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:46,878 INFO L124 PetriNetUnfolderBase]: 12480/17383 cut-off events. [2024-06-21 16:16:46,878 INFO L125 PetriNetUnfolderBase]: For 410319/410335 co-relation queries the response was YES. [2024-06-21 16:16:46,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106610 conditions, 17383 events. 12480/17383 cut-off events. For 410319/410335 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 97159 event pairs, 4696 based on Foata normal form. 62/17435 useless extension candidates. Maximal degree in co-relation 106556. Up to 15366 conditions per place. [2024-06-21 16:16:47,028 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 134 selfloop transitions, 133 changer transitions 0/274 dead transitions. [2024-06-21 16:16:47,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 274 transitions, 3719 flow [2024-06-21 16:16:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-21 16:16:47,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306603773584906 [2024-06-21 16:16:47,030 INFO L175 Difference]: Start difference. First operand has 128 places, 216 transitions, 2693 flow. Second operand 8 states and 225 transitions. [2024-06-21 16:16:47,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 274 transitions, 3719 flow [2024-06-21 16:16:47,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 274 transitions, 3627 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:16:47,311 INFO L231 Difference]: Finished difference. Result has 130 places, 220 transitions, 2965 flow [2024-06-21 16:16:47,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2601, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2965, PETRI_PLACES=130, PETRI_TRANSITIONS=220} [2024-06-21 16:16:47,312 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-21 16:16:47,312 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 220 transitions, 2965 flow [2024-06-21 16:16:47,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:47,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:47,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:47,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:16:47,313 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:47,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:47,313 INFO L85 PathProgramCache]: Analyzing trace with hash 715456622, now seen corresponding path program 1 times [2024-06-21 16:16:47,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:47,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475006515] [2024-06-21 16:16:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:47,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:47,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:47,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475006515] [2024-06-21 16:16:47,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475006515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:47,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:47,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:16:47,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357067823] [2024-06-21 16:16:47,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:47,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:16:47,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:47,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:16:47,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:16:48,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:48,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 220 transitions, 2965 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:48,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:48,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:48,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:50,455 INFO L124 PetriNetUnfolderBase]: 12503/17416 cut-off events. [2024-06-21 16:16:50,455 INFO L125 PetriNetUnfolderBase]: For 441224/441240 co-relation queries the response was YES. [2024-06-21 16:16:50,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111647 conditions, 17416 events. 12503/17416 cut-off events. For 441224/441240 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 97217 event pairs, 4733 based on Foata normal form. 18/17431 useless extension candidates. Maximal degree in co-relation 111592. Up to 16855 conditions per place. [2024-06-21 16:16:50,646 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 220 selfloop transitions, 29 changer transitions 0/256 dead transitions. [2024-06-21 16:16:50,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 256 transitions, 3789 flow [2024-06-21 16:16:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:16:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:16:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 16:16:50,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-21 16:16:50,648 INFO L175 Difference]: Start difference. First operand has 130 places, 220 transitions, 2965 flow. Second operand 6 states and 155 transitions. [2024-06-21 16:16:50,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 256 transitions, 3789 flow [2024-06-21 16:16:51,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 256 transitions, 3467 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:16:51,141 INFO L231 Difference]: Finished difference. Result has 130 places, 227 transitions, 2855 flow [2024-06-21 16:16:51,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2855, PETRI_PLACES=130, PETRI_TRANSITIONS=227} [2024-06-21 16:16:51,141 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-21 16:16:51,141 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 227 transitions, 2855 flow [2024-06-21 16:16:51,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:51,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:51,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:51,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:16:51,142 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:51,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash 334108094, now seen corresponding path program 2 times [2024-06-21 16:16:51,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:51,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973418329] [2024-06-21 16:16:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:51,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:52,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:52,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973418329] [2024-06-21 16:16:52,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973418329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:52,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:52,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:52,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474210887] [2024-06-21 16:16:52,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:52,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:52,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:52,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:52,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:52,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:52,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 227 transitions, 2855 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:52,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:52,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:52,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:55,021 INFO L124 PetriNetUnfolderBase]: 12574/17506 cut-off events. [2024-06-21 16:16:55,021 INFO L125 PetriNetUnfolderBase]: For 461278/461298 co-relation queries the response was YES. [2024-06-21 16:16:55,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111066 conditions, 17506 events. 12574/17506 cut-off events. For 461278/461298 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 97716 event pairs, 4715 based on Foata normal form. 26/17501 useless extension candidates. Maximal degree in co-relation 111010. Up to 15821 conditions per place. [2024-06-21 16:16:55,167 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 124 selfloop transitions, 148 changer transitions 0/279 dead transitions. [2024-06-21 16:16:55,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 279 transitions, 3819 flow [2024-06-21 16:16:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-21 16:16:55,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2024-06-21 16:16:55,169 INFO L175 Difference]: Start difference. First operand has 130 places, 227 transitions, 2855 flow. Second operand 8 states and 218 transitions. [2024-06-21 16:16:55,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 279 transitions, 3819 flow [2024-06-21 16:16:55,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 279 transitions, 3437 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:16:55,524 INFO L231 Difference]: Finished difference. Result has 131 places, 231 transitions, 2871 flow [2024-06-21 16:16:55,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2871, PETRI_PLACES=131, PETRI_TRANSITIONS=231} [2024-06-21 16:16:55,525 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-21 16:16:55,525 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 231 transitions, 2871 flow [2024-06-21 16:16:55,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:55,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:55,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:55,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:16:55,525 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:55,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:55,526 INFO L85 PathProgramCache]: Analyzing trace with hash -933279208, now seen corresponding path program 3 times [2024-06-21 16:16:55,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:55,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163420068] [2024-06-21 16:16:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:56,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:56,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163420068] [2024-06-21 16:16:56,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163420068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:56,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:56,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:56,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437896629] [2024-06-21 16:16:56,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:56,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:56,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:56,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:56,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:56,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:16:56,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 231 transitions, 2871 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:56,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:56,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:16:56,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:59,208 INFO L124 PetriNetUnfolderBase]: 12645/17597 cut-off events. [2024-06-21 16:16:59,209 INFO L125 PetriNetUnfolderBase]: For 501595/501607 co-relation queries the response was YES. [2024-06-21 16:16:59,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115840 conditions, 17597 events. 12645/17597 cut-off events. For 501595/501607 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 98093 event pairs, 4743 based on Foata normal form. 18/17584 useless extension candidates. Maximal degree in co-relation 115785. Up to 15918 conditions per place. [2024-06-21 16:16:59,387 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 137 selfloop transitions, 140 changer transitions 0/284 dead transitions. [2024-06-21 16:16:59,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 284 transitions, 3953 flow [2024-06-21 16:16:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-21 16:16:59,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165094339622641 [2024-06-21 16:16:59,389 INFO L175 Difference]: Start difference. First operand has 131 places, 231 transitions, 2871 flow. Second operand 8 states and 219 transitions. [2024-06-21 16:16:59,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 284 transitions, 3953 flow [2024-06-21 16:16:59,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 284 transitions, 3589 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 16:16:59,911 INFO L231 Difference]: Finished difference. Result has 133 places, 235 transitions, 2897 flow [2024-06-21 16:16:59,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2897, PETRI_PLACES=133, PETRI_TRANSITIONS=235} [2024-06-21 16:16:59,912 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-06-21 16:16:59,912 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 235 transitions, 2897 flow [2024-06-21 16:16:59,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:59,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:59,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:59,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:16:59,913 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:16:59,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:59,913 INFO L85 PathProgramCache]: Analyzing trace with hash 342678974, now seen corresponding path program 4 times [2024-06-21 16:16:59,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:59,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037243872] [2024-06-21 16:16:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:59,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:00,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:00,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037243872] [2024-06-21 16:17:00,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037243872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:00,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:00,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:00,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076490060] [2024-06-21 16:17:00,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:00,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:00,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:00,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:00,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:01,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:17:01,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 235 transitions, 2897 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:01,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:01,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:17:01,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:04,005 INFO L124 PetriNetUnfolderBase]: 12665/17635 cut-off events. [2024-06-21 16:17:04,005 INFO L125 PetriNetUnfolderBase]: For 542838/542858 co-relation queries the response was YES. [2024-06-21 16:17:04,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118716 conditions, 17635 events. 12665/17635 cut-off events. For 542838/542858 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 98540 event pairs, 4283 based on Foata normal form. 26/17630 useless extension candidates. Maximal degree in co-relation 118660. Up to 15362 conditions per place. [2024-06-21 16:17:04,190 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 120 selfloop transitions, 163 changer transitions 0/290 dead transitions. [2024-06-21 16:17:04,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 290 transitions, 3923 flow [2024-06-21 16:17:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 16:17:04,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-21 16:17:04,192 INFO L175 Difference]: Start difference. First operand has 133 places, 235 transitions, 2897 flow. Second operand 8 states and 222 transitions. [2024-06-21 16:17:04,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 290 transitions, 3923 flow [2024-06-21 16:17:04,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 290 transitions, 3567 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:04,600 INFO L231 Difference]: Finished difference. Result has 135 places, 239 transitions, 2984 flow [2024-06-21 16:17:04,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2984, PETRI_PLACES=135, PETRI_TRANSITIONS=239} [2024-06-21 16:17:04,601 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-21 16:17:04,601 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 239 transitions, 2984 flow [2024-06-21 16:17:04,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:04,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:04,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:04,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:17:04,602 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:17:04,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash 415513418, now seen corresponding path program 2 times [2024-06-21 16:17:04,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:04,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042485969] [2024-06-21 16:17:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:04,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:05,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:05,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042485969] [2024-06-21 16:17:05,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042485969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:05,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:05,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:17:05,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483670866] [2024-06-21 16:17:05,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:05,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:17:05,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:05,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:17:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:17:05,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:17:05,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 239 transitions, 2984 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:05,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:05,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:17:05,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:08,164 INFO L124 PetriNetUnfolderBase]: 12654/17637 cut-off events. [2024-06-21 16:17:08,165 INFO L125 PetriNetUnfolderBase]: For 582783/582807 co-relation queries the response was YES. [2024-06-21 16:17:08,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121857 conditions, 17637 events. 12654/17637 cut-off events. For 582783/582807 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 98566 event pairs, 4738 based on Foata normal form. 23/17654 useless extension candidates. Maximal degree in co-relation 121800. Up to 17074 conditions per place. [2024-06-21 16:17:08,356 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 225 selfloop transitions, 29 changer transitions 0/261 dead transitions. [2024-06-21 16:17:08,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 261 transitions, 3574 flow [2024-06-21 16:17:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:17:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:17:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 16:17:08,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-21 16:17:08,357 INFO L175 Difference]: Start difference. First operand has 135 places, 239 transitions, 2984 flow. Second operand 6 states and 147 transitions. [2024-06-21 16:17:08,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 261 transitions, 3574 flow [2024-06-21 16:17:08,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 261 transitions, 3137 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:08,985 INFO L231 Difference]: Finished difference. Result has 135 places, 239 transitions, 2617 flow [2024-06-21 16:17:08,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2547, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2617, PETRI_PLACES=135, PETRI_TRANSITIONS=239} [2024-06-21 16:17:08,986 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-21 16:17:08,986 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 239 transitions, 2617 flow [2024-06-21 16:17:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:08,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:08,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:08,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:17:08,987 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:17:08,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1607900804, now seen corresponding path program 1 times [2024-06-21 16:17:08,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:08,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204691015] [2024-06-21 16:17:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:08,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:09,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:09,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204691015] [2024-06-21 16:17:09,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204691015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:09,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:09,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:17:09,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564575082] [2024-06-21 16:17:09,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:09,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:17:09,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:09,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:17:09,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:17:09,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:17:09,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 239 transitions, 2617 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:09,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:09,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:17:09,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:12,072 INFO L124 PetriNetUnfolderBase]: 11268/16143 cut-off events. [2024-06-21 16:17:12,072 INFO L125 PetriNetUnfolderBase]: For 518623/518631 co-relation queries the response was YES. [2024-06-21 16:17:12,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108287 conditions, 16143 events. 11268/16143 cut-off events. For 518623/518631 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 93742 event pairs, 4125 based on Foata normal form. 8/16117 useless extension candidates. Maximal degree in co-relation 108229. Up to 15224 conditions per place. [2024-06-21 16:17:12,410 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 233 selfloop transitions, 25 changer transitions 0/266 dead transitions. [2024-06-21 16:17:12,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 266 transitions, 3360 flow [2024-06-21 16:17:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:17:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:17:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 16:17:12,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:17:12,411 INFO L175 Difference]: Start difference. First operand has 135 places, 239 transitions, 2617 flow. Second operand 6 states and 159 transitions. [2024-06-21 16:17:12,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 266 transitions, 3360 flow [2024-06-21 16:17:12,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 266 transitions, 3279 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:12,766 INFO L231 Difference]: Finished difference. Result has 136 places, 243 transitions, 2652 flow [2024-06-21 16:17:12,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2652, PETRI_PLACES=136, PETRI_TRANSITIONS=243} [2024-06-21 16:17:12,766 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 80 predicate places. [2024-06-21 16:17:12,767 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 243 transitions, 2652 flow [2024-06-21 16:17:12,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:12,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:12,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:12,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:17:12,769 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:17:12,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:12,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1614364304, now seen corresponding path program 2 times [2024-06-21 16:17:12,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:12,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473687981] [2024-06-21 16:17:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:12,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:13,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:13,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473687981] [2024-06-21 16:17:13,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473687981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:13,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:13,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:17:13,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964043335] [2024-06-21 16:17:13,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:13,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:17:13,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:13,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:17:13,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:17:13,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:17:13,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 243 transitions, 2652 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:13,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:13,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:17:13,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:16,001 INFO L124 PetriNetUnfolderBase]: 11222/16068 cut-off events. [2024-06-21 16:17:16,001 INFO L125 PetriNetUnfolderBase]: For 543582/543584 co-relation queries the response was YES. [2024-06-21 16:17:16,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108944 conditions, 16068 events. 11222/16068 cut-off events. For 543582/543584 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 93159 event pairs, 4137 based on Foata normal form. 2/16031 useless extension candidates. Maximal degree in co-relation 108885. Up to 15162 conditions per place. [2024-06-21 16:17:16,181 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 227 selfloop transitions, 26 changer transitions 0/261 dead transitions. [2024-06-21 16:17:16,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 261 transitions, 3214 flow [2024-06-21 16:17:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:17:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:17:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 16:17:16,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-21 16:17:16,182 INFO L175 Difference]: Start difference. First operand has 136 places, 243 transitions, 2652 flow. Second operand 6 states and 155 transitions. [2024-06-21 16:17:16,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 261 transitions, 3214 flow [2024-06-21 16:17:16,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 261 transitions, 3159 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 16:17:16,570 INFO L231 Difference]: Finished difference. Result has 139 places, 243 transitions, 2658 flow [2024-06-21 16:17:16,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2658, PETRI_PLACES=139, PETRI_TRANSITIONS=243} [2024-06-21 16:17:16,575 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-21 16:17:16,576 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 243 transitions, 2658 flow [2024-06-21 16:17:16,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:16,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:16,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:16,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:17:16,576 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:17:16,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash -945505760, now seen corresponding path program 1 times [2024-06-21 16:17:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:16,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140933427] [2024-06-21 16:17:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:16,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:17,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:17,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140933427] [2024-06-21 16:17:17,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140933427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:17,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:17,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909816009] [2024-06-21 16:17:17,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:17,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:17,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:17,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:17:17,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 243 transitions, 2658 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:17,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:17,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:17:17,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand