./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix053_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix053_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix053_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix053_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:30:08,178 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:30:08,246 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:30:08,252 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:30:08,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:30:08,282 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:30:08,283 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:30:08,283 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:30:08,284 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:30:08,287 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:30:08,288 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:30:08,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:30:08,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:30:08,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:30:08,291 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:30:08,291 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:30:08,291 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:30:08,291 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:30:08,292 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:30:08,292 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:30:08,292 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:30:08,293 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:30:08,293 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:30:08,293 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:30:08,293 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:30:08,294 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:30:08,294 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:30:08,294 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:30:08,295 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:30:08,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:30:08,296 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:30:08,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:30:08,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:30:08,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:30:08,297 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:30:08,297 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:30:08,297 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:30:08,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:30:08,298 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:30:08,298 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:30:08,298 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:30:08,299 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:30:08,299 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:30:08,299 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:30:08,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:30:08,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:30:08,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:30:08,575 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:30:08,576 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:30:08,577 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix053_tso.oepc.i [2024-06-20 16:30:09,797 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:30:10,026 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:30:10,027 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix053_tso.oepc.i [2024-06-20 16:30:10,047 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c2e49e5c/35870296f7554fd1ae9f76c6ae4599bd/FLAGb80a3f64d [2024-06-20 16:30:10,060 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c2e49e5c/35870296f7554fd1ae9f76c6ae4599bd [2024-06-20 16:30:10,062 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:30:10,062 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:30:10,063 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix053_tso.oepc.yml/witness.yml [2024-06-20 16:30:10,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:30:10,268 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:30:10,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:30:10,269 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:30:10,274 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:30:10,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:30:10" (1/2) ... [2024-06-20 16:30:10,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50546b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:30:10, skipping insertion in model container [2024-06-20 16:30:10,276 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:30:10" (1/2) ... [2024-06-20 16:30:10,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1dab875d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:30:10, skipping insertion in model container [2024-06-20 16:30:10,277 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:30:10" (2/2) ... [2024-06-20 16:30:10,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50546b30 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:10, skipping insertion in model container [2024-06-20 16:30:10,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:30:10" (2/2) ... [2024-06-20 16:30:10,278 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:30:10,427 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:30:10,429 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:30:10,429 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:30:10,430 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:30:10,430 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:30:10,430 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:30:10,431 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-06-20 16:30:10,477 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:30:10,842 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:30:10,863 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:30:11,024 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:30:11,073 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:30:11,074 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11 WrapperNode [2024-06-20 16:30:11,074 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:30:11,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:30:11,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:30:11,076 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:30:11,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,120 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,166 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 156 [2024-06-20 16:30:11,166 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:30:11,171 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:30:11,171 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:30:11,172 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:30:11,182 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,201 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,228 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:30:11,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,247 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,259 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,261 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,269 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:30:11,273 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:30:11,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:30:11,274 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:30:11,274 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (1/1) ... [2024-06-20 16:30:11,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:30:11,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:30:11,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:30:11,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:30:11,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:30:11,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:30:11,356 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:30:11,357 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:30:11,357 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:30:11,358 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:30:11,358 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:30:11,358 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:30:11,358 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:30:11,358 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:30:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:30:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:30:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:30:11,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:30:11,361 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:30:11,519 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:30:11,521 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:30:11,906 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:30:11,906 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:30:12,194 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:30:12,194 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:30:12,195 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:30:12 BoogieIcfgContainer [2024-06-20 16:30:12,195 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:30:12,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:30:12,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:30:12,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:30:12,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:30:10" (1/4) ... [2024-06-20 16:30:12,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d994b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:30:12, skipping insertion in model container [2024-06-20 16:30:12,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:30:10" (2/4) ... [2024-06-20 16:30:12,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d994b35 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:30:12, skipping insertion in model container [2024-06-20 16:30:12,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:30:11" (3/4) ... [2024-06-20 16:30:12,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d994b35 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:30:12, skipping insertion in model container [2024-06-20 16:30:12,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:30:12" (4/4) ... [2024-06-20 16:30:12,206 INFO L112 eAbstractionObserver]: Analyzing ICFG mix053_tso.oepc.i [2024-06-20 16:30:12,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:30:12,224 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:30:12,224 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:30:12,290 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:30:12,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:30:12,371 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-20 16:30:12,371 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:30:12,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:30:12,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:30:12,378 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-20 16:30:12,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:30:12,399 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;@73f2d407, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:30:12,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:30:12,405 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:30:12,405 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:30:12,406 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:30:12,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:12,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:30:12,407 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)] === [2024-06-20 16:30:12,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash 389701297, now seen corresponding path program 1 times [2024-06-20 16:30:12,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:12,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121022515] [2024-06-20 16:30:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:13,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:13,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121022515] [2024-06-20 16:30:13,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121022515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:13,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:13,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:30:13,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387515810] [2024-06-20 16:30:13,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:13,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:30:13,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:30:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:30:13,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:30:13,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:13,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:13,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:30:13,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:15,655 INFO L124 PetriNetUnfolderBase]: 8188/11556 cut-off events. [2024-06-20 16:30:15,656 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-20 16:30:15,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23109 conditions, 11556 events. 8188/11556 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 63575 event pairs, 6210 based on Foata normal form. 1/11371 useless extension candidates. Maximal degree in co-relation 23096. Up to 11164 conditions per place. [2024-06-20 16:30:15,733 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 42 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-20 16:30:15,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 225 flow [2024-06-20 16:30:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:30:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:30:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-20 16:30:15,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-20 16:30:15,746 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 93 transitions. [2024-06-20 16:30:15,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 225 flow [2024-06-20 16:30:15,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:30:15,756 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-20 16:30:15,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-20 16:30:15,761 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-20 16:30:15,761 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-20 16:30:15,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:15,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:15,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:15,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:30:15,763 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)] === [2024-06-20 16:30:15,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:15,763 INFO L85 PathProgramCache]: Analyzing trace with hash 841653080, now seen corresponding path program 1 times [2024-06-20 16:30:15,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:15,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813723094] [2024-06-20 16:30:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:15,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:16,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:16,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813723094] [2024-06-20 16:30:16,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813723094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:16,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:16,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:30:16,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863319630] [2024-06-20 16:30:16,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:16,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:30:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:30:16,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:30:16,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:30:16,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:16,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:16,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:30:16,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:18,604 INFO L124 PetriNetUnfolderBase]: 9573/13147 cut-off events. [2024-06-20 16:30:18,604 INFO L125 PetriNetUnfolderBase]: For 2477/2477 co-relation queries the response was YES. [2024-06-20 16:30:18,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29985 conditions, 13147 events. 9573/13147 cut-off events. For 2477/2477 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 69585 event pairs, 6546 based on Foata normal form. 4/13148 useless extension candidates. Maximal degree in co-relation 29973. Up to 12974 conditions per place. [2024-06-20 16:30:18,679 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 53 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-20 16:30:18,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 319 flow [2024-06-20 16:30:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:30:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:30:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-20 16:30:18,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2024-06-20 16:30:18,682 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 118 transitions. [2024-06-20 16:30:18,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 319 flow [2024-06-20 16:30:18,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:30:18,685 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-20 16:30:18,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-20 16:30:18,686 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-20 16:30:18,686 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-20 16:30:18,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:18,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:18,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:18,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:30:18,687 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)] === [2024-06-20 16:30:18,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash 321443458, now seen corresponding path program 1 times [2024-06-20 16:30:18,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:18,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864042391] [2024-06-20 16:30:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:18,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:19,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:19,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864042391] [2024-06-20 16:30:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864042391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:19,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:19,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:30:19,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496582860] [2024-06-20 16:30:19,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:19,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:30:19,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:19,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:30:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:30:19,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:30:19,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:19,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:19,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:30:19,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:21,590 INFO L124 PetriNetUnfolderBase]: 9591/13184 cut-off events. [2024-06-20 16:30:21,591 INFO L125 PetriNetUnfolderBase]: For 7220/7220 co-relation queries the response was YES. [2024-06-20 16:30:21,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33493 conditions, 13184 events. 9591/13184 cut-off events. For 7220/7220 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 69765 event pairs, 5215 based on Foata normal form. 7/13186 useless extension candidates. Maximal degree in co-relation 33479. Up to 12895 conditions per place. [2024-06-20 16:30:21,673 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 71 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-20 16:30:21,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 535 flow [2024-06-20 16:30:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:30:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:30:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-20 16:30:21,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-20 16:30:21,680 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 155 transitions. [2024-06-20 16:30:21,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 535 flow [2024-06-20 16:30:21,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 516 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:30:21,687 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-20 16:30:21,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-20 16:30:21,688 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-20 16:30:21,689 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-20 16:30:21,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:21,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:21,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:21,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:30:21,690 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)] === [2024-06-20 16:30:21,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1390891913, now seen corresponding path program 1 times [2024-06-20 16:30:21,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:21,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830322604] [2024-06-20 16:30:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:22,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:22,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830322604] [2024-06-20 16:30:22,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830322604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:22,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:22,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:30:22,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969432344] [2024-06-20 16:30:22,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:22,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:30:22,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:22,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:30:22,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:30:22,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:30:22,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:22,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:22,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:30:22,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:24,648 INFO L124 PetriNetUnfolderBase]: 9620/13234 cut-off events. [2024-06-20 16:30:24,649 INFO L125 PetriNetUnfolderBase]: For 17233/17239 co-relation queries the response was YES. [2024-06-20 16:30:24,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39126 conditions, 13234 events. 9620/13234 cut-off events. For 17233/17239 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 70281 event pairs, 4299 based on Foata normal form. 18/13247 useless extension candidates. Maximal degree in co-relation 39109. Up to 12860 conditions per place. [2024-06-20 16:30:24,736 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 78 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-06-20 16:30:24,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 680 flow [2024-06-20 16:30:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:30:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:30:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-20 16:30:24,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849673202614379 [2024-06-20 16:30:24,738 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 179 transitions. [2024-06-20 16:30:24,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 680 flow [2024-06-20 16:30:24,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 668 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:30:24,750 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 385 flow [2024-06-20 16:30:24,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-20 16:30:24,752 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-20 16:30:24,752 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 385 flow [2024-06-20 16:30:24,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:24,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:24,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:24,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:30:24,753 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)] === [2024-06-20 16:30:24,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:24,754 INFO L85 PathProgramCache]: Analyzing trace with hash 214448959, now seen corresponding path program 1 times [2024-06-20 16:30:24,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:24,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488559161] [2024-06-20 16:30:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:25,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:25,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488559161] [2024-06-20 16:30:25,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488559161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:25,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:25,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:30:25,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117026300] [2024-06-20 16:30:25,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:25,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:30:25,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:25,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:30:25,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:30:25,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:30:25,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:25,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:25,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:30:25,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:27,441 INFO L124 PetriNetUnfolderBase]: 8216/11594 cut-off events. [2024-06-20 16:30:27,442 INFO L125 PetriNetUnfolderBase]: For 21841/21841 co-relation queries the response was YES. [2024-06-20 16:30:27,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37156 conditions, 11594 events. 8216/11594 cut-off events. For 21841/21841 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 63837 event pairs, 4302 based on Foata normal form. 3/11594 useless extension candidates. Maximal degree in co-relation 37135. Up to 11191 conditions per place. [2024-06-20 16:30:27,554 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 66 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-20 16:30:27,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 581 flow [2024-06-20 16:30:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:30:27,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:30:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 16:30:27,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745098039215686 [2024-06-20 16:30:27,559 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 385 flow. Second operand 5 states and 121 transitions. [2024-06-20 16:30:27,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 581 flow [2024-06-20 16:30:27,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 512 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:30:27,575 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 347 flow [2024-06-20 16:30:27,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-20 16:30:27,583 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-20 16:30:27,584 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 347 flow [2024-06-20 16:30:27,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:27,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:27,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:27,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:30:27,586 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)] === [2024-06-20 16:30:27,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:27,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1950347063, now seen corresponding path program 1 times [2024-06-20 16:30:27,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:27,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641890932] [2024-06-20 16:30:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:27,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:28,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:28,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641890932] [2024-06-20 16:30:28,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641890932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:28,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:28,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:30:28,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535495234] [2024-06-20 16:30:28,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:28,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:30:28,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:28,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:30:28,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:30:28,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:30:28,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:28,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:28,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:30:28,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:30,281 INFO L124 PetriNetUnfolderBase]: 8198/11634 cut-off events. [2024-06-20 16:30:30,282 INFO L125 PetriNetUnfolderBase]: For 25269/25269 co-relation queries the response was YES. [2024-06-20 16:30:30,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37682 conditions, 11634 events. 8198/11634 cut-off events. For 25269/25269 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 64377 event pairs, 4090 based on Foata normal form. 6/11637 useless extension candidates. Maximal degree in co-relation 37659. Up to 11137 conditions per place. [2024-06-20 16:30:30,383 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 74 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-20 16:30:30,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 615 flow [2024-06-20 16:30:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:30:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:30:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 16:30:30,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738562091503268 [2024-06-20 16:30:30,385 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 347 flow. Second operand 6 states and 145 transitions. [2024-06-20 16:30:30,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 615 flow [2024-06-20 16:30:30,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 586 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:30:30,401 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 393 flow [2024-06-20 16:30:30,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-20 16:30:30,405 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-20 16:30:30,405 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 393 flow [2024-06-20 16:30:30,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:30,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:30,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:30,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:30:30,406 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)] === [2024-06-20 16:30:30,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:30,407 INFO L85 PathProgramCache]: Analyzing trace with hash -336936964, now seen corresponding path program 1 times [2024-06-20 16:30:30,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:30,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554050831] [2024-06-20 16:30:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:31,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554050831] [2024-06-20 16:30:31,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554050831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:31,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:31,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:30:31,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140294867] [2024-06-20 16:30:31,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:31,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:30:31,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:30:31,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:30:31,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:30:31,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:31,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:31,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:30:31,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:33,058 INFO L124 PetriNetUnfolderBase]: 9606/13255 cut-off events. [2024-06-20 16:30:33,059 INFO L125 PetriNetUnfolderBase]: For 40303/40315 co-relation queries the response was YES. [2024-06-20 16:30:33,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46540 conditions, 13255 events. 9606/13255 cut-off events. For 40303/40315 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 70435 event pairs, 4983 based on Foata normal form. 14/13264 useless extension candidates. Maximal degree in co-relation 46517. Up to 12914 conditions per place. [2024-06-20 16:30:33,146 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 73 selfloop transitions, 25 changer transitions 0/104 dead transitions. [2024-06-20 16:30:33,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 104 transitions, 732 flow [2024-06-20 16:30:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:30:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:30:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 16:30:33,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2024-06-20 16:30:33,148 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 393 flow. Second operand 6 states and 149 transitions. [2024-06-20 16:30:33,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 104 transitions, 732 flow [2024-06-20 16:30:33,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 689 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:30:33,165 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 446 flow [2024-06-20 16:30:33,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=446, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-20 16:30:33,165 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-20 16:30:33,166 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 446 flow [2024-06-20 16:30:33,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:33,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:33,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:33,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:30:33,167 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)] === [2024-06-20 16:30:33,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:33,167 INFO L85 PathProgramCache]: Analyzing trace with hash -72935074, now seen corresponding path program 2 times [2024-06-20 16:30:33,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:33,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042651269] [2024-06-20 16:30:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:33,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:34,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042651269] [2024-06-20 16:30:34,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042651269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:34,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:34,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:30:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109052038] [2024-06-20 16:30:34,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:34,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:30:34,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:30:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:30:34,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:30:34,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 446 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:34,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:34,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:30:34,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:35,656 INFO L124 PetriNetUnfolderBase]: 9582/13207 cut-off events. [2024-06-20 16:30:35,657 INFO L125 PetriNetUnfolderBase]: For 47027/47027 co-relation queries the response was YES. [2024-06-20 16:30:35,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47482 conditions, 13207 events. 9582/13207 cut-off events. For 47027/47027 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 70067 event pairs, 5003 based on Foata normal form. 3/13198 useless extension candidates. Maximal degree in co-relation 47458. Up to 12884 conditions per place. [2024-06-20 16:30:35,760 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 66 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-20 16:30:35,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 98 transitions, 692 flow [2024-06-20 16:30:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:30:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:30:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 16:30:35,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:30:35,762 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 446 flow. Second operand 6 states and 144 transitions. [2024-06-20 16:30:35,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 98 transitions, 692 flow [2024-06-20 16:30:35,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 649 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:30:35,781 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 466 flow [2024-06-20 16:30:35,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-20 16:30:35,783 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-20 16:30:35,783 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 466 flow [2024-06-20 16:30:35,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:35,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:35,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:35,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:30:35,784 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)] === [2024-06-20 16:30:35,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash 847064636, now seen corresponding path program 1 times [2024-06-20 16:30:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:35,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982539376] [2024-06-20 16:30:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:36,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:36,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982539376] [2024-06-20 16:30:36,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982539376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:36,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:36,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:30:36,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625446498] [2024-06-20 16:30:36,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:36,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:30:36,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:36,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:30:36,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:30:37,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:30:37,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 466 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:37,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:37,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:30:37,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:38,722 INFO L124 PetriNetUnfolderBase]: 9948/13711 cut-off events. [2024-06-20 16:30:38,722 INFO L125 PetriNetUnfolderBase]: For 57909/57918 co-relation queries the response was YES. [2024-06-20 16:30:38,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50876 conditions, 13711 events. 9948/13711 cut-off events. For 57909/57918 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 72743 event pairs, 4405 based on Foata normal form. 15/13719 useless extension candidates. Maximal degree in co-relation 50851. Up to 12950 conditions per place. [2024-06-20 16:30:38,818 INFO L140 encePairwiseOnDemand]: 35/51 looper letters, 103 selfloop transitions, 55 changer transitions 0/164 dead transitions. [2024-06-20 16:30:38,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 164 transitions, 1342 flow [2024-06-20 16:30:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:38,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 16:30:38,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073529411764706 [2024-06-20 16:30:38,821 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 466 flow. Second operand 8 states and 207 transitions. [2024-06-20 16:30:38,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 164 transitions, 1342 flow [2024-06-20 16:30:38,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 164 transitions, 1179 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:38,848 INFO L231 Difference]: Finished difference. Result has 79 places, 107 transitions, 787 flow [2024-06-20 16:30:38,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=787, PETRI_PLACES=79, PETRI_TRANSITIONS=107} [2024-06-20 16:30:38,849 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-20 16:30:38,849 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 107 transitions, 787 flow [2024-06-20 16:30:38,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:38,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:38,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:38,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:30:38,850 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)] === [2024-06-20 16:30:38,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:38,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1855109622, now seen corresponding path program 2 times [2024-06-20 16:30:38,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:38,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502705049] [2024-06-20 16:30:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:38,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:39,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:39,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502705049] [2024-06-20 16:30:39,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502705049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:39,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:39,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:30:39,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920509089] [2024-06-20 16:30:39,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:39,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:30:39,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:39,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:30:39,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:30:40,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:30:40,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 107 transitions, 787 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:40,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:40,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:30:40,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:41,889 INFO L124 PetriNetUnfolderBase]: 10108/13923 cut-off events. [2024-06-20 16:30:41,889 INFO L125 PetriNetUnfolderBase]: For 76337/76349 co-relation queries the response was YES. [2024-06-20 16:30:41,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56688 conditions, 13923 events. 10108/13923 cut-off events. For 76337/76349 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73589 event pairs, 4444 based on Foata normal form. 26/13942 useless extension candidates. Maximal degree in co-relation 56659. Up to 13062 conditions per place. [2024-06-20 16:30:41,984 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 89 selfloop transitions, 65 changer transitions 0/160 dead transitions. [2024-06-20 16:30:41,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 160 transitions, 1393 flow [2024-06-20 16:30:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:30:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:30:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 16:30:41,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957983193277311 [2024-06-20 16:30:41,986 INFO L175 Difference]: Start difference. First operand has 79 places, 107 transitions, 787 flow. Second operand 7 states and 177 transitions. [2024-06-20 16:30:41,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 160 transitions, 1393 flow [2024-06-20 16:30:42,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 160 transitions, 1352 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 16:30:42,035 INFO L231 Difference]: Finished difference. Result has 84 places, 116 transitions, 996 flow [2024-06-20 16:30:42,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=996, PETRI_PLACES=84, PETRI_TRANSITIONS=116} [2024-06-20 16:30:42,035 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-20 16:30:42,036 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 116 transitions, 996 flow [2024-06-20 16:30:42,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:42,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:42,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:42,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:30:42,037 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)] === [2024-06-20 16:30:42,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2033981672, now seen corresponding path program 3 times [2024-06-20 16:30:42,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:42,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110847858] [2024-06-20 16:30:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:42,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:43,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110847858] [2024-06-20 16:30:43,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110847858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:43,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:43,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:30:43,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125045445] [2024-06-20 16:30:43,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:43,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:30:43,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:43,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:30:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:30:43,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:30:43,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 116 transitions, 996 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:43,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:43,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:30:43,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:44,826 INFO L124 PetriNetUnfolderBase]: 10188/14045 cut-off events. [2024-06-20 16:30:44,826 INFO L125 PetriNetUnfolderBase]: For 90099/90103 co-relation queries the response was YES. [2024-06-20 16:30:44,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59794 conditions, 14045 events. 10188/14045 cut-off events. For 90099/90103 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74234 event pairs, 4442 based on Foata normal form. 12/14032 useless extension candidates. Maximal degree in co-relation 59763. Up to 13104 conditions per place. [2024-06-20 16:30:44,930 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 90 selfloop transitions, 79 changer transitions 0/175 dead transitions. [2024-06-20 16:30:44,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 175 transitions, 1792 flow [2024-06-20 16:30:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:30:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:30:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 16:30:44,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-20 16:30:44,932 INFO L175 Difference]: Start difference. First operand has 84 places, 116 transitions, 996 flow. Second operand 7 states and 179 transitions. [2024-06-20 16:30:44,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 175 transitions, 1792 flow [2024-06-20 16:30:45,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 175 transitions, 1623 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 16:30:45,013 INFO L231 Difference]: Finished difference. Result has 87 places, 130 transitions, 1205 flow [2024-06-20 16:30:45,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1205, PETRI_PLACES=87, PETRI_TRANSITIONS=130} [2024-06-20 16:30:45,014 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 33 predicate places. [2024-06-20 16:30:45,014 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 130 transitions, 1205 flow [2024-06-20 16:30:45,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:45,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:45,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:45,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:30:45,015 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)] === [2024-06-20 16:30:45,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1677740952, now seen corresponding path program 4 times [2024-06-20 16:30:45,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:45,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154506530] [2024-06-20 16:30:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:45,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:46,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:46,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154506530] [2024-06-20 16:30:46,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154506530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:46,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:46,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:30:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915994854] [2024-06-20 16:30:46,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:46,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:30:46,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:46,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:30:46,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:30:46,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:30:46,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 130 transitions, 1205 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:46,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:46,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:30:46,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:47,903 INFO L124 PetriNetUnfolderBase]: 10156/13991 cut-off events. [2024-06-20 16:30:47,903 INFO L125 PetriNetUnfolderBase]: For 90531/90541 co-relation queries the response was YES. [2024-06-20 16:30:47,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59247 conditions, 13991 events. 10156/13991 cut-off events. For 90531/90541 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73965 event pairs, 4424 based on Foata normal form. 18/13985 useless extension candidates. Maximal degree in co-relation 59215. Up to 13087 conditions per place. [2024-06-20 16:30:48,006 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 85 selfloop transitions, 81 changer transitions 0/172 dead transitions. [2024-06-20 16:30:48,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 172 transitions, 1739 flow [2024-06-20 16:30:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:30:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:30:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 16:30:48,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-20 16:30:48,008 INFO L175 Difference]: Start difference. First operand has 87 places, 130 transitions, 1205 flow. Second operand 7 states and 175 transitions. [2024-06-20 16:30:48,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 172 transitions, 1739 flow [2024-06-20 16:30:48,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 172 transitions, 1608 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-20 16:30:48,107 INFO L231 Difference]: Finished difference. Result has 92 places, 130 transitions, 1250 flow [2024-06-20 16:30:48,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1250, PETRI_PLACES=92, PETRI_TRANSITIONS=130} [2024-06-20 16:30:48,108 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-20 16:30:48,108 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 130 transitions, 1250 flow [2024-06-20 16:30:48,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:48,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:48,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:48,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:30:48,109 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)] === [2024-06-20 16:30:48,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:48,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1677732024, now seen corresponding path program 1 times [2024-06-20 16:30:48,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:48,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698601920] [2024-06-20 16:30:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:48,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:49,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:49,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698601920] [2024-06-20 16:30:49,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698601920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:49,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:49,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:49,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603755052] [2024-06-20 16:30:49,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:49,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:49,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:49,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:49,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:49,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:30:49,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 130 transitions, 1250 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:49,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:49,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:30:49,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:51,184 INFO L124 PetriNetUnfolderBase]: 8746/12331 cut-off events. [2024-06-20 16:30:51,184 INFO L125 PetriNetUnfolderBase]: For 85074/85076 co-relation queries the response was YES. [2024-06-20 16:30:51,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52926 conditions, 12331 events. 8746/12331 cut-off events. For 85074/85076 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 67609 event pairs, 3825 based on Foata normal form. 6/12334 useless extension candidates. Maximal degree in co-relation 52891. Up to 11846 conditions per place. [2024-06-20 16:30:51,271 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 142 selfloop transitions, 17 changer transitions 0/166 dead transitions. [2024-06-20 16:30:51,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 166 transitions, 1706 flow [2024-06-20 16:30:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:30:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:30:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:30:51,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:30:51,273 INFO L175 Difference]: Start difference. First operand has 92 places, 130 transitions, 1250 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:30:51,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 166 transitions, 1706 flow [2024-06-20 16:30:51,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 166 transitions, 1499 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:51,344 INFO L231 Difference]: Finished difference. Result has 92 places, 133 transitions, 1129 flow [2024-06-20 16:30:51,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1129, PETRI_PLACES=92, PETRI_TRANSITIONS=133} [2024-06-20 16:30:51,345 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-20 16:30:51,345 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 133 transitions, 1129 flow [2024-06-20 16:30:51,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:51,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:51,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:51,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:30:51,346 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)] === [2024-06-20 16:30:51,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1519240989, now seen corresponding path program 1 times [2024-06-20 16:30:51,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:51,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989332301] [2024-06-20 16:30:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:52,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:52,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989332301] [2024-06-20 16:30:52,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989332301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:52,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:52,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:30:52,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833962443] [2024-06-20 16:30:52,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:52,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:30:52,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:52,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:30:52,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:30:52,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:30:52,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 133 transitions, 1129 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:52,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:52,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:30:52,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:53,703 INFO L124 PetriNetUnfolderBase]: 8739/12560 cut-off events. [2024-06-20 16:30:53,704 INFO L125 PetriNetUnfolderBase]: For 94771/94773 co-relation queries the response was YES. [2024-06-20 16:30:53,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54446 conditions, 12560 events. 8739/12560 cut-off events. For 94771/94773 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 70156 event pairs, 3988 based on Foata normal form. 2/12559 useless extension candidates. Maximal degree in co-relation 54411. Up to 11903 conditions per place. [2024-06-20 16:30:53,797 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 134 selfloop transitions, 10 changer transitions 0/151 dead transitions. [2024-06-20 16:30:53,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 151 transitions, 1499 flow [2024-06-20 16:30:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:30:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:30:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-20 16:30:53,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2024-06-20 16:30:53,799 INFO L175 Difference]: Start difference. First operand has 92 places, 133 transitions, 1129 flow. Second operand 5 states and 117 transitions. [2024-06-20 16:30:53,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 151 transitions, 1499 flow [2024-06-20 16:30:53,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 151 transitions, 1439 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:30:53,881 INFO L231 Difference]: Finished difference. Result has 92 places, 137 transitions, 1144 flow [2024-06-20 16:30:53,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1144, PETRI_PLACES=92, PETRI_TRANSITIONS=137} [2024-06-20 16:30:53,882 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-20 16:30:53,882 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 137 transitions, 1144 flow [2024-06-20 16:30:53,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:53,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:53,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:53,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:30:53,883 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)] === [2024-06-20 16:30:53,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:53,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2142980314, now seen corresponding path program 1 times [2024-06-20 16:30:53,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:53,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168508057] [2024-06-20 16:30:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:53,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:54,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:54,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168508057] [2024-06-20 16:30:54,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168508057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:54,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:54,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:30:54,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262669125] [2024-06-20 16:30:54,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:54,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:30:54,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:54,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:30:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:30:55,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:30:55,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 137 transitions, 1144 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:55,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:55,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:30:55,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:56,788 INFO L124 PetriNetUnfolderBase]: 10222/14132 cut-off events. [2024-06-20 16:30:56,789 INFO L125 PetriNetUnfolderBase]: For 130587/130610 co-relation queries the response was YES. [2024-06-20 16:30:56,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65282 conditions, 14132 events. 10222/14132 cut-off events. For 130587/130610 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74794 event pairs, 4407 based on Foata normal form. 30/14155 useless extension candidates. Maximal degree in co-relation 65246. Up to 13133 conditions per place. [2024-06-20 16:30:56,909 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 100 selfloop transitions, 86 changer transitions 0/192 dead transitions. [2024-06-20 16:30:56,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 192 transitions, 1858 flow [2024-06-20 16:30:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:30:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:30:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:30:56,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-20 16:30:56,912 INFO L175 Difference]: Start difference. First operand has 92 places, 137 transitions, 1144 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:30:56,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 192 transitions, 1858 flow [2024-06-20 16:30:57,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 192 transitions, 1813 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 16:30:57,006 INFO L231 Difference]: Finished difference. Result has 96 places, 145 transitions, 1398 flow [2024-06-20 16:30:57,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1398, PETRI_PLACES=96, PETRI_TRANSITIONS=145} [2024-06-20 16:30:57,007 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-06-20 16:30:57,007 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 145 transitions, 1398 flow [2024-06-20 16:30:57,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:57,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:57,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:57,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:30:57,008 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)] === [2024-06-20 16:30:57,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1569188622, now seen corresponding path program 2 times [2024-06-20 16:30:57,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:57,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475079532] [2024-06-20 16:30:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:57,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:58,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:58,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475079532] [2024-06-20 16:30:58,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475079532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:58,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:58,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:30:58,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439390177] [2024-06-20 16:30:58,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:58,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:30:58,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:30:58,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:30:58,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:30:58,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 145 transitions, 1398 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:58,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:58,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:30:58,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:59,795 INFO L124 PetriNetUnfolderBase]: 10298/14238 cut-off events. [2024-06-20 16:30:59,795 INFO L125 PetriNetUnfolderBase]: For 147607/147632 co-relation queries the response was YES. [2024-06-20 16:30:59,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67817 conditions, 14238 events. 10298/14238 cut-off events. For 147607/147632 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 75387 event pairs, 4379 based on Foata normal form. 30/14261 useless extension candidates. Maximal degree in co-relation 67780. Up to 13200 conditions per place. [2024-06-20 16:30:59,912 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 101 selfloop transitions, 90 changer transitions 0/197 dead transitions. [2024-06-20 16:30:59,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 197 transitions, 2132 flow [2024-06-20 16:30:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:30:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:30:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 16:30:59,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957983193277311 [2024-06-20 16:30:59,914 INFO L175 Difference]: Start difference. First operand has 96 places, 145 transitions, 1398 flow. Second operand 7 states and 177 transitions. [2024-06-20 16:30:59,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 197 transitions, 2132 flow [2024-06-20 16:31:00,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 197 transitions, 1828 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:00,179 INFO L231 Difference]: Finished difference. Result has 97 places, 153 transitions, 1419 flow [2024-06-20 16:31:00,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1419, PETRI_PLACES=97, PETRI_TRANSITIONS=153} [2024-06-20 16:31:00,180 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-20 16:31:00,180 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 153 transitions, 1419 flow [2024-06-20 16:31:00,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:00,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:00,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:00,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:31:00,180 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)] === [2024-06-20 16:31:00,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:00,181 INFO L85 PathProgramCache]: Analyzing trace with hash 331646868, now seen corresponding path program 3 times [2024-06-20 16:31:00,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:00,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770014654] [2024-06-20 16:31:00,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:00,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:01,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:01,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770014654] [2024-06-20 16:31:01,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770014654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:01,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:01,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:01,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641850885] [2024-06-20 16:31:01,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:01,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:01,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:01,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:01,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:01,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:01,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 153 transitions, 1419 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:01,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:01,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:01,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:03,134 INFO L124 PetriNetUnfolderBase]: 10266/14200 cut-off events. [2024-06-20 16:31:03,134 INFO L125 PetriNetUnfolderBase]: For 158479/158527 co-relation queries the response was YES. [2024-06-20 16:31:03,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68227 conditions, 14200 events. 10266/14200 cut-off events. For 158479/158527 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 75302 event pairs, 4403 based on Foata normal form. 42/14211 useless extension candidates. Maximal degree in co-relation 68190. Up to 13173 conditions per place. [2024-06-20 16:31:03,228 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 98 selfloop transitions, 87 changer transitions 0/191 dead transitions. [2024-06-20 16:31:03,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 191 transitions, 1921 flow [2024-06-20 16:31:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:31:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:31:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 16:31:03,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-20 16:31:03,230 INFO L175 Difference]: Start difference. First operand has 97 places, 153 transitions, 1419 flow. Second operand 7 states and 169 transitions. [2024-06-20 16:31:03,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 191 transitions, 1921 flow [2024-06-20 16:31:03,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 191 transitions, 1712 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:03,357 INFO L231 Difference]: Finished difference. Result has 100 places, 153 transitions, 1399 flow [2024-06-20 16:31:03,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1399, PETRI_PLACES=100, PETRI_TRANSITIONS=153} [2024-06-20 16:31:03,357 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2024-06-20 16:31:03,358 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 153 transitions, 1399 flow [2024-06-20 16:31:03,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:03,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:03,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:03,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:31:03,358 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:03,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash 424650733, now seen corresponding path program 1 times [2024-06-20 16:31:03,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:03,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822185203] [2024-06-20 16:31:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:03,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:04,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:04,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822185203] [2024-06-20 16:31:04,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822185203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:04,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:04,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186896298] [2024-06-20 16:31:04,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:04,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:04,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:04,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:04,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:04,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:04,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 153 transitions, 1399 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:04,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:04,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:04,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:06,194 INFO L124 PetriNetUnfolderBase]: 10302/14244 cut-off events. [2024-06-20 16:31:06,194 INFO L125 PetriNetUnfolderBase]: For 173915/173935 co-relation queries the response was YES. [2024-06-20 16:31:06,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69308 conditions, 14244 events. 10302/14244 cut-off events. For 173915/173935 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 75588 event pairs, 3806 based on Foata normal form. 22/14261 useless extension candidates. Maximal degree in co-relation 69270. Up to 13587 conditions per place. [2024-06-20 16:31:06,298 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 147 selfloop transitions, 46 changer transitions 0/199 dead transitions. [2024-06-20 16:31:06,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 199 transitions, 2085 flow [2024-06-20 16:31:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:31:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:31:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 16:31:06,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789915966386555 [2024-06-20 16:31:06,300 INFO L175 Difference]: Start difference. First operand has 100 places, 153 transitions, 1399 flow. Second operand 7 states and 171 transitions. [2024-06-20 16:31:06,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 199 transitions, 2085 flow [2024-06-20 16:31:06,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 199 transitions, 1831 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:31:06,405 INFO L231 Difference]: Finished difference. Result has 100 places, 159 transitions, 1333 flow [2024-06-20 16:31:06,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1333, PETRI_PLACES=100, PETRI_TRANSITIONS=159} [2024-06-20 16:31:06,405 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2024-06-20 16:31:06,405 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 159 transitions, 1333 flow [2024-06-20 16:31:06,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:06,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:06,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:06,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:31:06,406 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)] === [2024-06-20 16:31:06,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:06,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1997847635, now seen corresponding path program 2 times [2024-06-20 16:31:06,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:06,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649368561] [2024-06-20 16:31:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:06,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:07,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:07,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649368561] [2024-06-20 16:31:07,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649368561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:07,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:07,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:07,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599566570] [2024-06-20 16:31:07,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:07,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:07,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:07,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:07,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:07,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 159 transitions, 1333 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:07,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:07,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:07,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:09,360 INFO L124 PetriNetUnfolderBase]: 10287/14222 cut-off events. [2024-06-20 16:31:09,360 INFO L125 PetriNetUnfolderBase]: For 193842/193854 co-relation queries the response was YES. [2024-06-20 16:31:09,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70988 conditions, 14222 events. 10287/14222 cut-off events. For 193842/193854 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 75483 event pairs, 4473 based on Foata normal form. 14/14231 useless extension candidates. Maximal degree in co-relation 70949. Up to 13702 conditions per place. [2024-06-20 16:31:09,474 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 146 selfloop transitions, 45 changer transitions 0/197 dead transitions. [2024-06-20 16:31:09,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 197 transitions, 1845 flow [2024-06-20 16:31:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:31:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:31:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:31:09,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:31:09,477 INFO L175 Difference]: Start difference. First operand has 100 places, 159 transitions, 1333 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:31:09,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 197 transitions, 1845 flow [2024-06-20 16:31:09,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 197 transitions, 1744 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 16:31:09,604 INFO L231 Difference]: Finished difference. Result has 104 places, 159 transitions, 1334 flow [2024-06-20 16:31:09,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1334, PETRI_PLACES=104, PETRI_TRANSITIONS=159} [2024-06-20 16:31:09,605 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-06-20 16:31:09,605 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 159 transitions, 1334 flow [2024-06-20 16:31:09,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:09,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:09,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:09,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:31:09,605 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)] === [2024-06-20 16:31:09,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:09,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1882371767, now seen corresponding path program 1 times [2024-06-20 16:31:09,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:09,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525084585] [2024-06-20 16:31:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:09,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:11,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:11,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525084585] [2024-06-20 16:31:11,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525084585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:11,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:11,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:11,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861948826] [2024-06-20 16:31:11,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:11,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:11,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:11,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:11,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:11,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:11,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 159 transitions, 1334 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-20 16:31:11,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:11,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:11,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:13,061 INFO L124 PetriNetUnfolderBase]: 10487/14508 cut-off events. [2024-06-20 16:31:13,061 INFO L125 PetriNetUnfolderBase]: For 221330/221345 co-relation queries the response was YES. [2024-06-20 16:31:13,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73604 conditions, 14508 events. 10487/14508 cut-off events. For 221330/221345 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77350 event pairs, 4088 based on Foata normal form. 44/14545 useless extension candidates. Maximal degree in co-relation 73563. Up to 13216 conditions per place. [2024-06-20 16:31:13,191 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 112 selfloop transitions, 96 changer transitions 0/214 dead transitions. [2024-06-20 16:31:13,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 214 transitions, 1970 flow [2024-06-20 16:31:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 16:31:13,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-20 16:31:13,193 INFO L175 Difference]: Start difference. First operand has 104 places, 159 transitions, 1334 flow. Second operand 8 states and 200 transitions. [2024-06-20 16:31:13,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 214 transitions, 1970 flow [2024-06-20 16:31:13,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 214 transitions, 1868 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:13,368 INFO L231 Difference]: Finished difference. Result has 106 places, 162 transitions, 1491 flow [2024-06-20 16:31:13,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=106, PETRI_TRANSITIONS=162} [2024-06-20 16:31:13,369 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 52 predicate places. [2024-06-20 16:31:13,369 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 162 transitions, 1491 flow [2024-06-20 16:31:13,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-20 16:31:13,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:13,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:13,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:31:13,370 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:13,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:13,370 INFO L85 PathProgramCache]: Analyzing trace with hash -298647906, now seen corresponding path program 1 times [2024-06-20 16:31:13,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:13,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301604988] [2024-06-20 16:31:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:13,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:14,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:14,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301604988] [2024-06-20 16:31:14,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301604988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:14,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:14,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:31:14,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851891766] [2024-06-20 16:31:14,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:14,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:31:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:31:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:31:14,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:14,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 162 transitions, 1491 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:14,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:14,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:14,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:16,036 INFO L124 PetriNetUnfolderBase]: 10503/14555 cut-off events. [2024-06-20 16:31:16,036 INFO L125 PetriNetUnfolderBase]: For 242232/242240 co-relation queries the response was YES. [2024-06-20 16:31:16,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76963 conditions, 14555 events. 10503/14555 cut-off events. For 242232/242240 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77805 event pairs, 4466 based on Foata normal form. 10/14562 useless extension candidates. Maximal degree in co-relation 76921. Up to 14242 conditions per place. [2024-06-20 16:31:16,175 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 169 selfloop transitions, 17 changer transitions 0/192 dead transitions. [2024-06-20 16:31:16,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 192 transitions, 2001 flow [2024-06-20 16:31:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 16:31:16,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-20 16:31:16,177 INFO L175 Difference]: Start difference. First operand has 106 places, 162 transitions, 1491 flow. Second operand 6 states and 138 transitions. [2024-06-20 16:31:16,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 192 transitions, 2001 flow [2024-06-20 16:31:16,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 192 transitions, 1790 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:16,353 INFO L231 Difference]: Finished difference. Result has 106 places, 166 transitions, 1380 flow [2024-06-20 16:31:16,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1380, PETRI_PLACES=106, PETRI_TRANSITIONS=166} [2024-06-20 16:31:16,353 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 52 predicate places. [2024-06-20 16:31:16,353 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 166 transitions, 1380 flow [2024-06-20 16:31:16,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:16,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:16,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:16,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:31:16,354 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:16,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash -183225305, now seen corresponding path program 2 times [2024-06-20 16:31:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:16,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444040470] [2024-06-20 16:31:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:17,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444040470] [2024-06-20 16:31:17,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444040470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:17,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:17,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:17,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369191356] [2024-06-20 16:31:17,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:17,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:17,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:17,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:17,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:17,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 166 transitions, 1380 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-20 16:31:17,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:17,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:17,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:19,953 INFO L124 PetriNetUnfolderBase]: 10539/14574 cut-off events. [2024-06-20 16:31:19,953 INFO L125 PetriNetUnfolderBase]: For 265407/265411 co-relation queries the response was YES. [2024-06-20 16:31:19,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79226 conditions, 14574 events. 10539/14574 cut-off events. For 265407/265411 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77599 event pairs, 4118 based on Foata normal form. 8/14545 useless extension candidates. Maximal degree in co-relation 79183. Up to 13537 conditions per place. [2024-06-20 16:31:20,064 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 112 selfloop transitions, 98 changer transitions 0/216 dead transitions. [2024-06-20 16:31:20,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 216 transitions, 2014 flow [2024-06-20 16:31:20,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 16:31:20,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47794117647058826 [2024-06-20 16:31:20,066 INFO L175 Difference]: Start difference. First operand has 106 places, 166 transitions, 1380 flow. Second operand 8 states and 195 transitions. [2024-06-20 16:31:20,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 216 transitions, 2014 flow [2024-06-20 16:31:20,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 216 transitions, 1946 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:20,225 INFO L231 Difference]: Finished difference. Result has 110 places, 169 transitions, 1581 flow [2024-06-20 16:31:20,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1581, PETRI_PLACES=110, PETRI_TRANSITIONS=169} [2024-06-20 16:31:20,226 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2024-06-20 16:31:20,226 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 169 transitions, 1581 flow [2024-06-20 16:31:20,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-20 16:31:20,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:20,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:20,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:31:20,226 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)] === [2024-06-20 16:31:20,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1687990199, now seen corresponding path program 3 times [2024-06-20 16:31:20,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:20,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403211965] [2024-06-20 16:31:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:20,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:21,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:21,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403211965] [2024-06-20 16:31:21,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403211965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:21,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:21,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:21,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012853306] [2024-06-20 16:31:21,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:21,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:21,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:21,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 169 transitions, 1581 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-20 16:31:21,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:21,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:21,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:24,014 INFO L124 PetriNetUnfolderBase]: 10575/14630 cut-off events. [2024-06-20 16:31:24,014 INFO L125 PetriNetUnfolderBase]: For 296384/296392 co-relation queries the response was YES. [2024-06-20 16:31:24,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82973 conditions, 14630 events. 10575/14630 cut-off events. For 296384/296392 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 78062 event pairs, 4102 based on Foata normal form. 12/14605 useless extension candidates. Maximal degree in co-relation 82929. Up to 13589 conditions per place. [2024-06-20 16:31:24,142 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 113 selfloop transitions, 100 changer transitions 0/219 dead transitions. [2024-06-20 16:31:24,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 219 transitions, 2229 flow [2024-06-20 16:31:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:24,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 16:31:24,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2024-06-20 16:31:24,144 INFO L175 Difference]: Start difference. First operand has 110 places, 169 transitions, 1581 flow. Second operand 8 states and 194 transitions. [2024-06-20 16:31:24,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 219 transitions, 2229 flow [2024-06-20 16:31:24,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 219 transitions, 1988 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:24,320 INFO L231 Difference]: Finished difference. Result has 112 places, 172 transitions, 1619 flow [2024-06-20 16:31:24,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1619, PETRI_PLACES=112, PETRI_TRANSITIONS=172} [2024-06-20 16:31:24,321 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-20 16:31:24,321 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 172 transitions, 1619 flow [2024-06-20 16:31:24,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-20 16:31:24,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:24,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:24,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:31:24,321 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)] === [2024-06-20 16:31:24,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash 719661657, now seen corresponding path program 4 times [2024-06-20 16:31:24,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:24,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492958870] [2024-06-20 16:31:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:24,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:25,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:25,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492958870] [2024-06-20 16:31:25,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492958870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:25,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:25,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:25,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810872129] [2024-06-20 16:31:25,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:25,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:25,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:25,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:25,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:25,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:25,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 172 transitions, 1619 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-20 16:31:25,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:25,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:25,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:27,842 INFO L124 PetriNetUnfolderBase]: 10560/14597 cut-off events. [2024-06-20 16:31:27,842 INFO L125 PetriNetUnfolderBase]: For 326392/326400 co-relation queries the response was YES. [2024-06-20 16:31:27,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85145 conditions, 14597 events. 10560/14597 cut-off events. For 326392/326400 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77584 event pairs, 3796 based on Foata normal form. 12/14572 useless extension candidates. Maximal degree in co-relation 85100. Up to 13180 conditions per place. [2024-06-20 16:31:27,977 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 108 selfloop transitions, 111 changer transitions 0/225 dead transitions. [2024-06-20 16:31:27,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 225 transitions, 2293 flow [2024-06-20 16:31:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 16:31:27,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2024-06-20 16:31:27,978 INFO L175 Difference]: Start difference. First operand has 112 places, 172 transitions, 1619 flow. Second operand 8 states and 198 transitions. [2024-06-20 16:31:27,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 225 transitions, 2293 flow [2024-06-20 16:31:28,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 225 transitions, 2042 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:28,192 INFO L231 Difference]: Finished difference. Result has 114 places, 175 transitions, 1674 flow [2024-06-20 16:31:28,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1674, PETRI_PLACES=114, PETRI_TRANSITIONS=175} [2024-06-20 16:31:28,193 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2024-06-20 16:31:28,193 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 175 transitions, 1674 flow [2024-06-20 16:31:28,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-20 16:31:28,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:28,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:28,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:31:28,194 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:28,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:28,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1738954716, now seen corresponding path program 2 times [2024-06-20 16:31:28,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:28,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402459793] [2024-06-20 16:31:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:28,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:29,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:29,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402459793] [2024-06-20 16:31:29,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402459793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:29,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:29,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:31:29,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723118196] [2024-06-20 16:31:29,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:29,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:31:29,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:29,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:31:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:31:29,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:29,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 175 transitions, 1674 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:29,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:29,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:29,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:30,895 INFO L124 PetriNetUnfolderBase]: 10553/14635 cut-off events. [2024-06-20 16:31:30,896 INFO L125 PetriNetUnfolderBase]: For 356515/356539 co-relation queries the response was YES. [2024-06-20 16:31:30,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87600 conditions, 14635 events. 10553/14635 cut-off events. For 356515/356539 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 78288 event pairs, 4457 based on Foata normal form. 18/14644 useless extension candidates. Maximal degree in co-relation 87554. Up to 14298 conditions per place. [2024-06-20 16:31:31,027 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 170 selfloop transitions, 24 changer transitions 0/200 dead transitions. [2024-06-20 16:31:31,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 200 transitions, 2204 flow [2024-06-20 16:31:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 16:31:31,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43790849673202614 [2024-06-20 16:31:31,028 INFO L175 Difference]: Start difference. First operand has 114 places, 175 transitions, 1674 flow. Second operand 6 states and 134 transitions. [2024-06-20 16:31:31,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 200 transitions, 2204 flow [2024-06-20 16:31:31,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 200 transitions, 1924 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:31,250 INFO L231 Difference]: Finished difference. Result has 114 places, 179 transitions, 1527 flow [2024-06-20 16:31:31,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1527, PETRI_PLACES=114, PETRI_TRANSITIONS=179} [2024-06-20 16:31:31,250 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2024-06-20 16:31:31,250 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 179 transitions, 1527 flow [2024-06-20 16:31:31,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:31,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:31,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:31,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:31:31,251 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)] === [2024-06-20 16:31:31,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1744662684, now seen corresponding path program 1 times [2024-06-20 16:31:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:31,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001430510] [2024-06-20 16:31:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:31,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:32,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:32,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001430510] [2024-06-20 16:31:32,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001430510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:32,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:32,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:31:32,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042996250] [2024-06-20 16:31:32,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:31:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:31:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:31:32,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:32,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 179 transitions, 1527 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:32,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:32,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:32,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:33,914 INFO L124 PetriNetUnfolderBase]: 9174/13151 cut-off events. [2024-06-20 16:31:33,914 INFO L125 PetriNetUnfolderBase]: For 323437/323439 co-relation queries the response was YES. [2024-06-20 16:31:33,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78982 conditions, 13151 events. 9174/13151 cut-off events. For 323437/323439 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 73631 event pairs, 3774 based on Foata normal form. 2/13150 useless extension candidates. Maximal degree in co-relation 78935. Up to 12511 conditions per place. [2024-06-20 16:31:34,034 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 183 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2024-06-20 16:31:34,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 204 transitions, 2047 flow [2024-06-20 16:31:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 16:31:34,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2024-06-20 16:31:34,035 INFO L175 Difference]: Start difference. First operand has 114 places, 179 transitions, 1527 flow. Second operand 6 states and 140 transitions. [2024-06-20 16:31:34,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 204 transitions, 2047 flow [2024-06-20 16:31:34,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 204 transitions, 1944 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:34,239 INFO L231 Difference]: Finished difference. Result has 116 places, 183 transitions, 1529 flow [2024-06-20 16:31:34,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1529, PETRI_PLACES=116, PETRI_TRANSITIONS=183} [2024-06-20 16:31:34,240 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 62 predicate places. [2024-06-20 16:31:34,240 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 183 transitions, 1529 flow [2024-06-20 16:31:34,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:34,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:34,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:34,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:31:34,240 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)] === [2024-06-20 16:31:34,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:34,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1738948764, now seen corresponding path program 2 times [2024-06-20 16:31:34,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:34,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376430116] [2024-06-20 16:31:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:34,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:35,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:35,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376430116] [2024-06-20 16:31:35,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376430116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:35,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:35,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:31:35,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825291163] [2024-06-20 16:31:35,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:35,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:31:35,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:35,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:31:35,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:31:35,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:35,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 183 transitions, 1529 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:35,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:35,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:35,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:36,927 INFO L124 PetriNetUnfolderBase]: 9167/13162 cut-off events. [2024-06-20 16:31:36,927 INFO L125 PetriNetUnfolderBase]: For 346529/346537 co-relation queries the response was YES. [2024-06-20 16:31:36,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81512 conditions, 13162 events. 9167/13162 cut-off events. For 346529/346537 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 73800 event pairs, 3775 based on Foata normal form. 6/13163 useless extension candidates. Maximal degree in co-relation 81464. Up to 12484 conditions per place. [2024-06-20 16:31:37,037 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 177 selfloop transitions, 21 changer transitions 0/205 dead transitions. [2024-06-20 16:31:37,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 205 transitions, 2049 flow [2024-06-20 16:31:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 16:31:37,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542483660130719 [2024-06-20 16:31:37,038 INFO L175 Difference]: Start difference. First operand has 116 places, 183 transitions, 1529 flow. Second operand 6 states and 139 transitions. [2024-06-20 16:31:37,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 205 transitions, 2049 flow [2024-06-20 16:31:37,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 205 transitions, 1974 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:37,259 INFO L231 Difference]: Finished difference. Result has 118 places, 187 transitions, 1581 flow [2024-06-20 16:31:37,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1581, PETRI_PLACES=118, PETRI_TRANSITIONS=187} [2024-06-20 16:31:37,259 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-20 16:31:37,259 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 187 transitions, 1581 flow [2024-06-20 16:31:37,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:37,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:37,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:37,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:31:37,260 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)] === [2024-06-20 16:31:37,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1738940828, now seen corresponding path program 1 times [2024-06-20 16:31:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:37,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443525078] [2024-06-20 16:31:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:37,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:38,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:38,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443525078] [2024-06-20 16:31:38,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443525078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:38,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:38,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:38,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388736517] [2024-06-20 16:31:38,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:38,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:38,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:38,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:38,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:38,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:38,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 187 transitions, 1581 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:38,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:38,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:38,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:40,369 INFO L124 PetriNetUnfolderBase]: 10882/15357 cut-off events. [2024-06-20 16:31:40,369 INFO L125 PetriNetUnfolderBase]: For 445383/445385 co-relation queries the response was YES. [2024-06-20 16:31:40,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97860 conditions, 15357 events. 10882/15357 cut-off events. For 445383/445385 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 84354 event pairs, 4596 based on Foata normal form. 2/15356 useless extension candidates. Maximal degree in co-relation 97811. Up to 14786 conditions per place. [2024-06-20 16:31:40,496 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 193 selfloop transitions, 18 changer transitions 0/217 dead transitions. [2024-06-20 16:31:40,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 217 transitions, 2164 flow [2024-06-20 16:31:40,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:31:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:31:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-20 16:31:40,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42296918767507 [2024-06-20 16:31:40,497 INFO L175 Difference]: Start difference. First operand has 118 places, 187 transitions, 1581 flow. Second operand 7 states and 151 transitions. [2024-06-20 16:31:40,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 217 transitions, 2164 flow [2024-06-20 16:31:40,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 217 transitions, 2062 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:40,740 INFO L231 Difference]: Finished difference. Result has 122 places, 195 transitions, 1632 flow [2024-06-20 16:31:40,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1632, PETRI_PLACES=122, PETRI_TRANSITIONS=195} [2024-06-20 16:31:40,741 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-20 16:31:40,741 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 195 transitions, 1632 flow [2024-06-20 16:31:40,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:40,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:40,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:40,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:31:40,742 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)] === [2024-06-20 16:31:40,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:40,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1513307369, now seen corresponding path program 1 times [2024-06-20 16:31:40,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:40,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32814253] [2024-06-20 16:31:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:40,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:41,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:41,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32814253] [2024-06-20 16:31:41,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32814253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:41,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:41,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:41,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685949907] [2024-06-20 16:31:41,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:41,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:41,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:41,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:41,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:41,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:41,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 195 transitions, 1632 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:41,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:41,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:41,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:44,257 INFO L124 PetriNetUnfolderBase]: 12114/16800 cut-off events. [2024-06-20 16:31:44,257 INFO L125 PetriNetUnfolderBase]: For 572458/572469 co-relation queries the response was YES. [2024-06-20 16:31:44,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113704 conditions, 16800 events. 12114/16800 cut-off events. For 572458/572469 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 91616 event pairs, 3727 based on Foata normal form. 28/16801 useless extension candidates. Maximal degree in co-relation 113653. Up to 14567 conditions per place. [2024-06-20 16:31:44,412 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 146 selfloop transitions, 101 changer transitions 0/254 dead transitions. [2024-06-20 16:31:44,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 254 transitions, 2572 flow [2024-06-20 16:31:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 16:31:44,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:31:44,415 INFO L175 Difference]: Start difference. First operand has 122 places, 195 transitions, 1632 flow. Second operand 8 states and 204 transitions. [2024-06-20 16:31:44,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 254 transitions, 2572 flow [2024-06-20 16:31:44,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 254 transitions, 2481 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:44,741 INFO L231 Difference]: Finished difference. Result has 126 places, 199 transitions, 1884 flow [2024-06-20 16:31:44,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1884, PETRI_PLACES=126, PETRI_TRANSITIONS=199} [2024-06-20 16:31:44,742 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 72 predicate places. [2024-06-20 16:31:44,742 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 199 transitions, 1884 flow [2024-06-20 16:31:44,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:44,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:44,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:44,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:31:44,743 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:44,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:44,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1459378659, now seen corresponding path program 2 times [2024-06-20 16:31:44,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:44,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974476824] [2024-06-20 16:31:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:44,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:45,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:45,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974476824] [2024-06-20 16:31:45,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974476824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:45,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:45,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:45,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217545875] [2024-06-20 16:31:45,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:45,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:45,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:45,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:45,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:45,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:45,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 199 transitions, 1884 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:45,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:45,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:45,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:48,685 INFO L124 PetriNetUnfolderBase]: 12274/17027 cut-off events. [2024-06-20 16:31:48,685 INFO L125 PetriNetUnfolderBase]: For 617605/617616 co-relation queries the response was YES. [2024-06-20 16:31:48,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118070 conditions, 17027 events. 12274/17027 cut-off events. For 617605/617616 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 93033 event pairs, 4665 based on Foata normal form. 28/17038 useless extension candidates. Maximal degree in co-relation 118018. Up to 15451 conditions per place. [2024-06-20 16:31:49,251 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 149 selfloop transitions, 99 changer transitions 0/255 dead transitions. [2024-06-20 16:31:49,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 255 transitions, 2622 flow [2024-06-20 16:31:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 16:31:49,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49754901960784315 [2024-06-20 16:31:49,253 INFO L175 Difference]: Start difference. First operand has 126 places, 199 transitions, 1884 flow. Second operand 8 states and 203 transitions. [2024-06-20 16:31:49,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 255 transitions, 2622 flow [2024-06-20 16:31:49,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 255 transitions, 2479 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:49,657 INFO L231 Difference]: Finished difference. Result has 130 places, 201 transitions, 2020 flow [2024-06-20 16:31:49,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2020, PETRI_PLACES=130, PETRI_TRANSITIONS=201} [2024-06-20 16:31:49,658 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-20 16:31:49,658 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 201 transitions, 2020 flow [2024-06-20 16:31:49,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:49,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:49,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:49,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:31:49,659 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:49,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:49,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1572418026, now seen corresponding path program 1 times [2024-06-20 16:31:49,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896108518] [2024-06-20 16:31:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:49,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:50,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:50,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896108518] [2024-06-20 16:31:50,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896108518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:50,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:50,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481207240] [2024-06-20 16:31:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:50,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:50,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 201 transitions, 2020 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:50,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:50,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:50,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:53,157 INFO L124 PetriNetUnfolderBase]: 12396/17228 cut-off events. [2024-06-20 16:31:53,157 INFO L125 PetriNetUnfolderBase]: For 653574/653612 co-relation queries the response was YES. [2024-06-20 16:31:53,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121092 conditions, 17228 events. 12396/17228 cut-off events. For 653574/653612 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 94879 event pairs, 5027 based on Foata normal form. 30/17253 useless extension candidates. Maximal degree in co-relation 121038. Up to 16618 conditions per place. [2024-06-20 16:31:53,530 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 189 selfloop transitions, 47 changer transitions 0/243 dead transitions. [2024-06-20 16:31:53,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 243 transitions, 2710 flow [2024-06-20 16:31:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:31:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:31:53,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:31:53,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:31:53,532 INFO L175 Difference]: Start difference. First operand has 130 places, 201 transitions, 2020 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:31:53,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 243 transitions, 2710 flow [2024-06-20 16:31:53,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 243 transitions, 2463 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:53,941 INFO L231 Difference]: Finished difference. Result has 131 places, 206 transitions, 1976 flow [2024-06-20 16:31:53,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1976, PETRI_PLACES=131, PETRI_TRANSITIONS=206} [2024-06-20 16:31:53,941 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 77 predicate places. [2024-06-20 16:31:53,941 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 206 transitions, 1976 flow [2024-06-20 16:31:53,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:53,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:53,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:53,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:31:53,942 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:53,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2114647611, now seen corresponding path program 3 times [2024-06-20 16:31:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:53,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351032334] [2024-06-20 16:31:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:53,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:55,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351032334] [2024-06-20 16:31:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351032334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:55,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015187371] [2024-06-20 16:31:55,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:55,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:55,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:55,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 206 transitions, 1976 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:55,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:55,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:55,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:58,215 INFO L124 PetriNetUnfolderBase]: 12655/17653 cut-off events. [2024-06-20 16:31:58,215 INFO L125 PetriNetUnfolderBase]: For 719220/719257 co-relation queries the response was YES. [2024-06-20 16:31:58,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127768 conditions, 17653 events. 12655/17653 cut-off events. For 719220/719257 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 98030 event pairs, 4075 based on Foata normal form. 46/17692 useless extension candidates. Maximal degree in co-relation 127713. Up to 15871 conditions per place. [2024-06-20 16:31:58,362 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 162 selfloop transitions, 101 changer transitions 0/270 dead transitions. [2024-06-20 16:31:58,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 270 transitions, 3006 flow [2024-06-20 16:31:58,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 16:31:58,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122549019607843 [2024-06-20 16:31:58,364 INFO L175 Difference]: Start difference. First operand has 131 places, 206 transitions, 1976 flow. Second operand 8 states and 209 transitions. [2024-06-20 16:31:58,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 270 transitions, 3006 flow [2024-06-20 16:31:58,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 270 transitions, 2841 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 16:31:58,732 INFO L231 Difference]: Finished difference. Result has 134 places, 210 transitions, 2170 flow [2024-06-20 16:31:58,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2170, PETRI_PLACES=134, PETRI_TRANSITIONS=210} [2024-06-20 16:31:58,733 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 80 predicate places. [2024-06-20 16:31:58,733 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 210 transitions, 2170 flow [2024-06-20 16:31:58,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:58,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:58,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:58,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:31:58,733 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:58,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash -456696335, now seen corresponding path program 4 times [2024-06-20 16:31:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:58,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666445105] [2024-06-20 16:31:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:58,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:59,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666445105] [2024-06-20 16:31:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666445105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:59,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:59,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627604460] [2024-06-20 16:31:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:59,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:59,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:59,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:59,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 210 transitions, 2170 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:59,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:59,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:59,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:03,045 INFO L124 PetriNetUnfolderBase]: 12819/17873 cut-off events. [2024-06-20 16:32:03,045 INFO L125 PetriNetUnfolderBase]: For 770335/770368 co-relation queries the response was YES. [2024-06-20 16:32:03,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131370 conditions, 17873 events. 12819/17873 cut-off events. For 770335/770368 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 99370 event pairs, 4753 based on Foata normal form. 46/17912 useless extension candidates. Maximal degree in co-relation 131314. Up to 16515 conditions per place. [2024-06-20 16:32:03,196 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 166 selfloop transitions, 92 changer transitions 0/265 dead transitions. [2024-06-20 16:32:03,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 265 transitions, 2940 flow [2024-06-20 16:32:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 16:32:03,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4877450980392157 [2024-06-20 16:32:03,200 INFO L175 Difference]: Start difference. First operand has 134 places, 210 transitions, 2170 flow. Second operand 8 states and 199 transitions. [2024-06-20 16:32:03,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 265 transitions, 2940 flow [2024-06-20 16:32:03,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 265 transitions, 2777 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:03,760 INFO L231 Difference]: Finished difference. Result has 138 places, 212 transitions, 2283 flow [2024-06-20 16:32:03,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2283, PETRI_PLACES=138, PETRI_TRANSITIONS=212} [2024-06-20 16:32:03,761 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2024-06-20 16:32:03,761 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 212 transitions, 2283 flow [2024-06-20 16:32:03,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:03,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:03,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:03,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:32:03,761 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:03,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2064528181, now seen corresponding path program 5 times [2024-06-20 16:32:03,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:03,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554296731] [2024-06-20 16:32:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:03,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:04,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554296731] [2024-06-20 16:32:04,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554296731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:04,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:04,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:04,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800434511] [2024-06-20 16:32:04,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:04,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:04,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:04,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:04,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:05,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:05,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 212 transitions, 2283 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:05,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:05,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:05,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:08,393 INFO L124 PetriNetUnfolderBase]: 12983/18141 cut-off events. [2024-06-20 16:32:08,394 INFO L125 PetriNetUnfolderBase]: For 813012/813049 co-relation queries the response was YES. [2024-06-20 16:32:08,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134622 conditions, 18141 events. 12983/18141 cut-off events. For 813012/813049 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 101404 event pairs, 4797 based on Foata normal form. 52/18186 useless extension candidates. Maximal degree in co-relation 134564. Up to 16759 conditions per place. [2024-06-20 16:32:08,563 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 167 selfloop transitions, 96 changer transitions 0/270 dead transitions. [2024-06-20 16:32:08,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 270 transitions, 3079 flow [2024-06-20 16:32:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:08,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 16:32:08,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49754901960784315 [2024-06-20 16:32:08,565 INFO L175 Difference]: Start difference. First operand has 138 places, 212 transitions, 2283 flow. Second operand 8 states and 203 transitions. [2024-06-20 16:32:08,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 270 transitions, 3079 flow [2024-06-20 16:32:09,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 270 transitions, 2849 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:09,175 INFO L231 Difference]: Finished difference. Result has 140 places, 214 transitions, 2341 flow [2024-06-20 16:32:09,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2341, PETRI_PLACES=140, PETRI_TRANSITIONS=214} [2024-06-20 16:32:09,176 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-06-20 16:32:09,176 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 214 transitions, 2341 flow [2024-06-20 16:32:09,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:09,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:09,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:09,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:32:09,176 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:09,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:09,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1777626361, now seen corresponding path program 1 times [2024-06-20 16:32:09,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:09,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381422230] [2024-06-20 16:32:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:09,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:10,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:10,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381422230] [2024-06-20 16:32:10,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381422230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:10,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:10,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:10,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967473806] [2024-06-20 16:32:10,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:10,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:10,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:10,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:10,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:10,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 214 transitions, 2341 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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) [2024-06-20 16:32:10,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:10,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:10,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:13,910 INFO L124 PetriNetUnfolderBase]: 13075/18249 cut-off events. [2024-06-20 16:32:13,911 INFO L125 PetriNetUnfolderBase]: For 846916/846949 co-relation queries the response was YES. [2024-06-20 16:32:13,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136273 conditions, 18249 events. 13075/18249 cut-off events. For 846916/846949 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 102113 event pairs, 4771 based on Foata normal form. 34/18266 useless extension candidates. Maximal degree in co-relation 136214. Up to 16227 conditions per place. [2024-06-20 16:32:14,082 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 163 selfloop transitions, 99 changer transitions 0/269 dead transitions. [2024-06-20 16:32:14,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 269 transitions, 3117 flow [2024-06-20 16:32:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 16:32:14,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-20 16:32:14,083 INFO L175 Difference]: Start difference. First operand has 140 places, 214 transitions, 2341 flow. Second operand 8 states and 200 transitions. [2024-06-20 16:32:14,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 269 transitions, 3117 flow [2024-06-20 16:32:14,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 269 transitions, 2875 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:14,829 INFO L231 Difference]: Finished difference. Result has 142 places, 216 transitions, 2387 flow [2024-06-20 16:32:14,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2387, PETRI_PLACES=142, PETRI_TRANSITIONS=216} [2024-06-20 16:32:14,830 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 88 predicate places. [2024-06-20 16:32:14,830 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 216 transitions, 2387 flow [2024-06-20 16:32:14,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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) [2024-06-20 16:32:14,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:14,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:14,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:32:14,830 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:14,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:14,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1572716556, now seen corresponding path program 2 times [2024-06-20 16:32:14,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:14,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414058448] [2024-06-20 16:32:14,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:14,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:15,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:15,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414058448] [2024-06-20 16:32:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414058448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:15,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:15,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:15,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150541196] [2024-06-20 16:32:15,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:15,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:15,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:15,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:15,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:15,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 216 transitions, 2387 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:15,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:15,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:15,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand